Showing papers on "Time-division multiplexing published in 2016"

Low Complexity Layered Division Multiplexing for ATSC 3.0

Abstract: In this paper, we propose novel transmitter and receiver architectures for low complexity layered division multiplexing (LDM) systems. The proposed transmitter architecture, which is adopted as a baseline technology of the Advanced Television Systems Committee 3.0, shares time and frequency interleavers, FFT, pilot patterns, guard interval, preamble, and bootstrap among different layers, so that the implementation of LDM receivers can be realized with less than 10% complexity increase compared to conventional single layer receivers. With such low complexity increment, we show simulation and laboratory test results that the proposed LDM system has significant performance advantage (3–9 dB) over traditional TDM systems, and maintains its performance up to the velocity of 260 km/h in mobile reception.

Prospects and research issues in multi-dimensional all optical networks

Abstract: Research into all optical network (AON) technology has been ongoing over the past decade, and new features are constantly being developed The advantages of AON include large-bandwidth provisioning, low-latency transmission and low energy consumption The basic concept underlying AON is transmission of data signals entirely through the optical domain from source to destination nodes, with no optical-electrical-optical (O-E-O) conversion at intermediate nodes The technologies used to implement AON have undergone a series of evolutions, which encompass time division multiplexing (TDM), frequency division multiplexing (FDM), and space division multiplexing (SDM) Multi-dimensional AON (MD-AON), which leads the trend of AONs future architecture, provides a vibrant state for emerging applications such as cloud computing and Internet of Things (IoT) In this article, we review the evolution of AON architectures based on the different all optical switching and multiplexing technologies (ie, TDM, FDM, and SDM), which is one of the main areas of focus in this article The other main area is detailed discussion of implementations such as data plane and control plane technologies as well as resource optimization technologies for realizing AON We also introduce several AON testbeds with their compositions and functions, and some potential application scenarios that can be implemented based on these testbeds

ACE-BOC: dual-frequency constant envelope multiplexing for satellite navigation

Abstract: In the signal design of new generation global navigation satellite systems, there is a strong demand for multiplexing multiple binary spreading signals on two adjacent frequencies into an integrated signal with a constant envelope. In this paper, a dual-frequency constant envelope multiplexing (DCEM) technique with high-design flexibility based on subcarrier waveform reconstruction, named asymmetric constant envelope binary offset carrier (ACE-BOC), is presented. This multiplexing technique can be seen as a generalized alternate BOC. It can combine four or fewer independent, bipolar, direct sequence spread spectrum signals onto two sidebands of a spectrum-split integrated signal, where each sideband consists of two or fewer signals with arbitrary power ratio modulated onto the quadrature components. The design principle, diversified generation methods of ACE-BOC signals, as well as the characteristics in both time and frequency domains are investigated. Multiplexing efficiency and receiving performance of this signal are also analyzed. Analysis with typical examples shows that, for both transmitters and receivers, ACE-BOC signals have multiple processing forms. Compared with existing DCEM methods, ACE-BOC has much higher design flexibility in the number of signal components, power ratio among components, hardware complexity of both transmitters and receivers, and spectrum compatibility. Such high-level design flexibility provides system designers great room in signal scheme optimization for varied navigation applications in the future.

Physical Layer Framing for ATSC 3.0

Abstract: An ATSC 3.0 physical layer frame consists of a bootstrap immediately followed by a preamble containing layer 1 control signaling and then one or more subframes carrying payload data. Subframes within a particular frame may be of the same or different types, with different subframe types being configured for different classes of receivers (e.g., mobile versus fixed). This paper focuses on the subframe structure, configuration, and contents, including subframe boundary symbols which carry additional pilots to assist with channel estimation at the receiver and cell multiplexing which maps physical layer pipe (PLP) payload data to physical layer resources within each subframe. Various methods for cell multiplexing multiple PLPs within a subframe are discussed and described, including time division multiplexing, frequency division multiplexing, time-frequency division multiplexing, and layered division multiplexing. Frequency interleaving, pilot insertion, and guard interval insertion are also covered, including a method of distributing extra samples to guard intervals in order to obtain frame lengths equal to an integer number of milliseconds.

Orthogonal Power Division Multiple Access: A Green Communication Perspective

Abstract: In cellular networks, since Media Access Control (MAC) layer plays a key role in every access equipment, it fascinates that little progress on multiple access protocol could save considerable energy. Accordingly, this paper studies a novel MAC protocol, i.e., the power division multiple access (PDMA) protocol, with the purpose of green communication. As a fundamental study of PDMA, we first propose a power division multiplexing (PDM) scheme, analogous to the time division multiplexing and frequency division multiplexing. It is proved that the transmit power could be divided into multiple regular power segments (PSs) to simultaneously transmit multiple independent information/data streams in peer to peer communications. Based on our fundamental studies of PDM, an orthogonal PDMA (OPDMA) protocol is proposed to utilize multiplexing and degraded channel gains for energy saving. By adopting the orthogonal PSs proposed in OPDMA, multiple information streams in different channels could be transmitted efficiently and concurrently with quality of service guarantee. This paper shows that the proposed OPDMA not only has low computational complexity as the conventional Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA) protocols but also gains better energy efficiency, which consists with the energy saving requirement in green communications.

All-Optical Programmable Disaggregated Data Centre Network Realized by FPGA-Based Switch and Interface Card

Abstract: This paper reports an FPGA-based switch and interface card (SIC) and its application scenario in an all-optical, programmable disaggregated data center network (DCN). Our novel SIC is designed and implemented to replace traditional optical network interface cards, plugged into the server directly, supporting optical packet switching (OPS)/optical circuit switching (OCS) or time division multiplexing (TDM)/wavelength division multiplexing (WDM) traffic on demand. Placing the SIC in each server/blade, we eliminate electronics from the top of rack (ToR) switch by pushing all the functionality on each blade while enabling direct intrarack blade-to-blade communication to deliver ultralow chip-to-chip latency. We demonstrate the disaggregated DCN architecture scenarios along with all-optical dimension-programmable N × M spectrum selective Switches (SSS) and an architecture-on-demand (AoD) optical backplane. OPS and OCS complement each other as do TDM and WDM, which can support variable traffic flows. A flat disaggregated DCN architecture is realized by connecting the optical ToR switches directly to either an optical top of cluster switch or the intracluster AoD optical backplane, while clusters are further interconnected to an intercluster AoD for scaling out.

Bidirectional Fiber-Wireless Access Technology for 5G Mobile Spectral Aggregation and Cell Densification

Abstract: Empowered by spectral aggregation and cell densification, future 5G mobile data networks pose a huge challenge to building next-generation mobile fronthaul systems with higher capacity, scalability, and energy efficiency. Under this circumstance, traditional solutions based on the Common Public Radio Interface or channel aggregation with digital signal processing (DSP) are not sufficient to support heterogeneous ubiquitous wireless access. In this paper, we demonstrate a point-to-multipoint bidirectional mobile fronthaul system. Wavelength division multiplexing plus frequency division multiplexing is applied to support independent asynchronous small cells. Intensity-modulation and direct-detection downlink (DL) as well as field-modulation and heterodyne-detection uplink (UL) are proposed. Combined with efficient virtual tone-based DSP for phase recovery and carrier-frequency-offset estimation, signal degradations from beating among incoherent asynchronous UL signals are mitigated. Proof-of-concept experiments are demonstrated where 20 and 16 80-MHz component carriers are transmitted over 25-km standard single-mode fiber for DL and UL, respectively. Less than 6% error vector magnitudes with 64-, 16-, and 4-ary quadrature amplitude modulation are obtained.

Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol

Abstract: Advanced ACTPol is an instrument upgrade for the six-meter Atacama Cosmology Telescope (ACT) designed to measure the cosmic microwave background (CMB) temperature and polarization with arcminute-scale angular resolution. To achieve its science goals, Advanced ACTPol utilizes a larger readout multiplexing factor than any previous CMB experiment to measure detector arrays with approximately two thousand transition-edge sensor (TES) bolometers in each 150 mm detector wafer. We present the implementation and testing of the Advanced ACTPol time-division multiplexing readout architecture with a 64-row multiplexing factor. This includes testing of individual multichroic detector pixels and superconducting quantum interference device (SQUID) multiplexing chips as well as testing and optimizing of the integrated readout electronics. In particular, we describe the new automated multiplexing SQUID tuning procedure developed to select and optimize the thousands of SQUID parameters required to readout each Advanced ACTPol array. The multichroic detector pixels in each array use separate channels for each polarization and each of the two frequencies, such that four TESes must be read out per pixel. Challenges addressed include doubling the number of detectors per multiplexed readout channel compared to ACTPol and optimizing the Nyquist inductance to minimize detector and SQUID noise aliasing.

A Multichannel Medium Access Control Protocol for Vehicular Power Line Communication Systems

Abstract: In-vehicle communications are emerging to play an important role in the continued development of reliable and efficient X-by-Wire applications in new vehicles. Since vehicle devices, sensors, and the electronic control unit (ECU) are already connected to power wires, the advancement of power line communications (PLCs) can provide a very low cost and virtually free platform for in-vehicle communications. In this paper, we propose a medium access control (MAC) protocol for vehicular PLC systems, where multiple nodes are competing for transmission over the direct current (dc) power line. The proposed protocol uses a combination of time and frequency multiplexing and consists of two key features: 1) a distributed channel selection policy to arbitrate packet transmission across different channels and provide robustness against interference and noise and 2) a distributed collision resolution algorithm to allow efficient nodes completion over selected channels. Specifically, the collision resolution algorithm is optimized with respect to the channel policy such that the success probability of transmission in each channel is maximized. Numerical results are also supplemented to validate the performance of the proposed protocol and provide useful guidelines for developing a robust contention-based MAC protocol for vehicular PLC systems.

Silicon mode multiplexer processing dual-path mode-division multiplexing signals.

Abstract: Great strides have been made in the optical interconnect for a mode-division multiplexing (MDM) system. The mode multiplexer/demultiplexer (MUX/DEMUX) is the crucial component for the MDM system. We propose and demonstrate a scheme that is different from the reported multiplexing schemes, mode MUX that tackles dual-path MDM signals simultaneously and avoids mode conflict. The performance is experimentally demonstrated by integrating the proposed MUX and DEMUX into a MDM link, with ∼1 dB of insertion loss and ∼18 dB extinction ratio over the C-band. Single-wavelength, non-return-to-zero on–off keying signals at 10 Gb/s carried on dual-path different modes are successfully processed with open and clear eye diagrams, and <1 dB power penalty are obtained.

Time-division multiplexing holographic display using angular-spectrum layer-oriented method (Invited Paper)

Abstract: A time-division multiplexing method for computer-generated holograms (CGHs) is proposed to solve the problem of the limited space-bandwidth product. A three-dimensional (3-D) scene is divided into multiple layers at different depths. The CGH corresponding to each layer is calculated by an angular-spectrum algorithm that is effective at a wide range of propagation distances. All of the CGHs are combined into several group-CGHs. These group-CGHs are sequentially uploaded onto one spatial light modulator at a high frame rate. The space-bandwidth product can be benefited by the time-division processing of the CGHs. The proposed method provides a new approach to achieve high quality 3-D display with a fast and accurate CGH computation.

Digital domain power division multiplexing DDO-OFDM transmission with successive interference cancellation

Abstract: Two independent 25-Gb/s DDO-OFDM signals are simultaneously transmitted over 25km SMF using digital domain power division multiplexing and successive interference cancellation With optimized power division ratio and enhanced SD-FEC, the spectral efficiency can be doubled

Direct Digital Demultiplexing of Analog TDM Signals for Cable Reduction in Ultrasound Imaging Catheters

Abstract: In real-time catheter-based 3-D ultrasound imaging applications, gathering data from the transducer arrays is difficult, as there is a restriction on cable count due to the diameter of the catheter. Although area and power hungry multiplexing circuits integrated at the catheter tip are used in some applications, these are unsuitable for use in small sized catheters for applications, such as intracardiac imaging. Furthermore, the length requirement for catheters and limited power available to on-chip cable drivers leads to limited signal strength at the receiver end. In this paper, an alternative approach using analog time-division multiplexing (TDM) is presented, which addresses the cable restrictions of ultrasound catheters. A novel digital demultiplexing technique is also described, which allows for a reduction in the number of analog signal processing stages required. The TDM and digital demultiplexing schemes are demonstrated for an intracardiac imaging system that would operate in the 4- to 11-MHz range. A TDM integrated circuit (IC) with an 8:1 multiplexer is interfaced with a fast analog-to-digital converter (ADC) through a microcoaxial catheter cable bundle, and processed with a field-programmable gate array register-transfer level simulation. Input signals to the TDM IC are recovered with −40-dB crosstalk between the channels on the same microcoax, showing the feasibility of this system for ultrasound imaging applications.

Optical pulse division multiplexing-based OBI reduction for single wavelength uplink multiple access in IM/DD OFDMA-PON.

Abstract: Orthogonal frequency division multiple access-based passive optical network (OFDMA-PON) is considered as a strong candidate for next-generation optical access network. In intensity modulation/direct detection system, OFDMA-PON downlink transmission is relatively stable, but critical issues exist in uplink multiple access. Because of different optical paths, optical beat interference (OBI) and timing offset effect are generated, which seriously disturb signal detection. We propose optical pulse division multiplexing-based OBI reduction. By considering both the spectrum broadening effect and the time domain near orthogonality, OBI could be reduced. We demonstrate that the spectral efficiency can be improved from 0.37 to 3.8 bit/s/Hz in 1-GHz signal bandwidth.

Non-Orthogonal Unicast and Broadcast Transmission via Joint Beamforming and LDM in Cellular Networks

Abstract: -Research efforts to incorporate multicast and broadcast transmission into the cellular network architecture are gaining momentum, particularly for multimedia streaming applications. Layered division multiplexing (LDM), a form of nonorthogonal multiple access (NOMA), can potentially improve unicast throughput and broadcast coverage with respect to traditional orthogonal frequency division multiplexing (FDM) or time division multiplexing (TDM), by simultaneously using the same frequency and time resources for multiple unicast or broadcast transmissions. In this paper, the performance of LDM-based unicast and broadcast transmission in a cellular network is studied by assuming a single frequency network (SFN) operation for the broadcast layer, while allowing for arbitrarily clustered cooperation for the transmission of unicast data streams. Beamforming and power allocation between unicast and broadcast layers, and hence the so-called injection level in the LDM literature, are optimized with the aim of minimizing the sum-power under constraints on the user-specific unicast rates and on the common broadcast rate. The problem is tackled by means of successive convex approximation (SCA) techniques, as well as through the calculation of performance upper bounds by means of semidefinite relaxation (SDR). Numerical results are provided to compare the orthogonal and non-orthogonal multiplexing of broadcast and unicast traffic.

Stereoscopic imaging apparatus and method, and display

Abstract: Embodiments of the present disclosure provide a stereoscopic imaging apparatus and method, and a display. The stereoscopic imaging apparatus includes: a display panel, which includes multiple pixel units, and is configured to display images in a time division multiplexing scheme; and an electro-optic modulation layer, which includes multiple electro-optic modulation units respectively arranged at positions corresponding to the multiple pixel units, and is configured to alternately deflect light rays of the images displayed on the multiple pixel units into different projection directions under the effect of electric fields that change in a time division multiplexing scheme, where the electric fields that change in a time division multiplexing scheme change synchronously with the images displayed in a time division multiplexing scheme. The technical solutions of the embodiments of the present disclosure can improve resolution of auto-stereoscopic display.

Distributed ultrahigh-speed disturbance quantitative detection method and device

Abstract: The invention discloses a distributed ultrahigh-speed disturbance quantitative detection method. Ultrahigh-speed disturbance detection can be realized through a time division multiplexing method; and phase demodulation is carried out through phase demodulation methods such as Hilbert transformation and orthogonal transformation so as to be able to realize real-time detection on the disturbance position, frequency and amplitude. The invention further discloses a distributed ultrahigh-speed disturbance quantitative detection device, which comprises a pulse generator, a laser, a first coupler, a pulse modulator, an erbium-doped optical fiber amplifier, a circulator, an optical fiber sensing unit, a second coupler, a balance detector, a band-pass filter, a power amplifier and a data acquisition card. According to the invention, the repetition frequency of detecting light pulses is improved through a time division multiplexing technology, so that a reflecting grating based phi-OTDR system is enabled to realize ultrahigh-speed disturbance detection; and real-time detection for the disturbance position, frequency and amplitude is realized through the phase demodulation method by using a coherent detection structure and combining a phase unwrapping algorithm.

Duplex communication method, base station and terminal

Abstract: The invention discloses a bidirectional communication method and equipment. One of an uplink control channel and a downlink control channel is transmitted in a first sub-band and a third sub-band of available continuous bands, and the control channels of different directions are transmitted in the first sub-band and the third sub-band at the same time; and uplink data and downlink data are transmitted in the second sub-band of the available continuous bands according to a time division multiplexing mode, wherein the first sub-band and the third sub-band are arranged at the two ends of the available continuous bands. With application of the bidirectional communication method and equipment, the spectral utilization rate and the performance of a wireless communication system can be enhanced.

WDM Orthogonal Subcarrier Multiplexing

Abstract: Electro-optical transceivers can be implemented employing all-analog signal processing in order to achieve low values of power consumption and latency. This paper shows that the spectral efficiency of such solutions can be increased by combining orthogonal multicarrier techniques and off-the-shelf microwave components. A real-time 108-Gbit/s experiment was performed emulating a wavelength division multiplexing (WDM) system composed of five optical channels. The optical carriers were provided by an externally injected gain switched optical frequency comb. Each optical channel transmitted a 21.6-Gbit/s orthogonal subcarrier multiplexing (SCM) signal that was modulated and demodulated in the electrical domain without the requirement for digital signal processing. The net data rate remained higher than 100 Gbit/s after taking into account forward error correction overheads. The use of orthogonally overlapping subchannels achieves an unprecedented spectral efficiency in all-analog real-time broadband WDM/SCM links.

Secure Transmissions via Compressive Sensing in Multicarrier Systems

Abstract: In this paper, we consider an encryption scheme based on compressive sensing for multicarrier systems, where artificial noise is selectively transmitted together with a sparse message signal in the frequency domain to make an adversary's attack difficult. In order to minimize the impact of artificial noise on the performance of a legitimate receiver, the channel state information at the transmitter is exploited under the assumption of channel reciprocity in time division multiplexing mode. We consider attack to estimate the measurement matrix using the maximum likelihood approach and find the probability of correct recovery (or successful attack) under certain assumptions which might be favorable for the adversary.

Opportunistic wake-up transmissions via time-division multiplexing in ofdma-based 802.11ax

Abstract: Mobile platform power management is an important problem especially for battery-powered small form factor platforms such as smartphones, tablets, wearable devices, Internet of Things (IOT) devices, and the like. A wake-up packet scheduler, a packet manager and a padding manager interact and cooperate to insert at least one wake-up packet on a sub-channel in a padding area after a data frame, the wake-up packet usable by a low-power wake-up radio in, for example, an IEEE 802.11 wireless communication environment.

Combined Optical and Electrical Spectrum Shaping for High-Baud-Rate Nyquist-WDM Transceivers

Abstract: We discuss the benefits and limitations of optical time-division multiplexing (OTDM) techniques based on the optical generation of a periodic train of sinc pulses for wavelength-division multiplexing (WDM) transmission at high baud rates. It is shown how the modulated OTDM spectrum bandwidth is related to the optical comb parameters and the pulse shaping of the modulating waveforms in the electrical domain. Such dependence may result in broadening of the modulated spectra, which can degrade the performance of Nyquist-WDM systems due to interchannel crosstalk penalties. However, it is shown and experimentally demonstrated that the same technique of optical pulse train generation can be allied with digital pulse shaping to improve the confinement of the modulated spectrum toward the Nyquist limit independently of the number of OTDM tributaries used. To investigate the benefits of the proposed approach, we demonstrate the first WDM Nyquist-OTDM signal generation based on the periodic train of sinc pulses and electrical spectrum shaping. Straight line transmission of five 112.5-Gbd Nyquist-OTDM dual-polarization quadrature phase-shift keying (QPSK) channels is demonstrated over a dispersion uncompensated link up to 640 km, with full-field coherent detection at the receiver. It is shown that such a design strategy effectively improves the spectral confinement of the modulated OTDM signal, providing a minimum intercarrier crosstalk penalty of 1.5 dB in baud-rate-spaced Nyquist-WDM systems.

Multichannel Wireless Neural Recording AFE Architectures: Analysis, Modeling, and Tradeoffs

Abstract: This paper presents theoretical analyses of three analog-to-digital-conversion-based and one analog-to-time-conversion-based AFE architectures. They are particularly focused on the significant parameters that affect the design of neural recording implants.

Time division multiplexed orbital angular momentum based communication

Abstract: Optical signals with different orbital angular momentum (OAM) modes are used to multiplex data directed to different receiver together using time division multiplexing. The OAM based multiplexing may be used in addition to other multiplexing schemes such as time division multiplexing, polarization multiplexing and so on. Capacity of existing optical network infrastructure can be increased significantly using OAM modulation, and data communication can be secured at the same time.

Adaptive M-PAM for Multiuser MISO Indoor VLC Systems

Abstract: In multiuser multiple input single output (MISO) visible light communication (VLC) systems using LEDs with limited rise-times, it is essential to find effective M-ary modulation schemes to increase the bit rate. In this paper, we propose an adaptive M-ary pulse amplitude modulation (M- PAM) algorithm to support multiple users. The proposed algorithm can adjust the modulation constellation size for each user to maximize the bit rate under different channel environments such as shadowing, light dimming, and the impact of multiple access interference. In our MISO approach, multiple LED lamps coordinate to provide users with maximum data rates. We compare optical code division multiplexing access (OCDMA) using our adaptive M-PAM with time division multiplexing access (TDMA). The OCDMA technique can offer a higher bit rate when the number of users is larger than the length of the OCDMA code.

Space‐Division Multiplexing and MIMO Processing

Abstract: This chapter first describes various optical fibers that can support space‐division multiplexing (SDM) transmission. It then reviews SDM transmission techniques that can be utilized in case the crosstalk between the spatial channels is small, for example, in multi‐core fibers (MCFs). The chapter also introduces the general principles for SDM transmission over optical fibers in the presence of coupling between the spatial channels, describes the basic properties of the fiber‐optic multimode channel, such as differential group delay (DGD) and mode‐dependent loss (MDL), as well as the strategies to reduce the impact of the DGD. It further discusses experimental results for multiple‐input multiple‐output (MIMO) transmission and MIMO digital signal processing (DSP) techniques specific to SDM systems. The second part of the chapter describes methods for SDM component characterization and components required for SDM transmission systems such as mode couplers, SDM wavelength‐selective switches (WSSs), and SDM optical amplifiers.

Extended Field-of-view and Increased-signal 3D Holographic Illumination with Time-division Multiplexing

Abstract: We both extend the field-of-view and increase the signal in two-photon computer generated holography by using galvanometer mirrors to time-sequentially reposition multiple 3D holograms. We apply this toward 3D two-photon in vivo neuronal calcium imaging.

Poster: A TDM approach for latency reduction of ultra-reliable low-latency data in 5G

Abstract: 5G enhanced Vehicle-to-Everything (eV2X) is envisioned to offer simultaneous support for ultra-reliable ultra-low latency (URLLC) services such as collision warnings and high bandwidth cooperated driving services such as sensor sharing. In this paper, we propose a time division multiplexing approach and provide corresponding downlink design considerations for transmitting ultra-low latency high-priority user data over other services. Our approach can reduce Hybrid ARQ (HARQ) Round Trip Time (RTT) by half and attain the 5G eV2X goal of 99.999% reliability within 1ms under co-existence.

Power division multiplexing

Abstract: At present, the non-orthogonal multiple access (NOMA) protocol has been considered as an emerging access technology for the near 5G networks. However, the related resource division multiplexing technique has not been well studied. Referring to the development of TDMA and FDMA, they are all based on the fundamental studies of time division multiplexing (TDM) and frequency division multiplexing (FDM), respectively. Accordingly, this paper proposes a new multiplexing technique, termed as power division multiplexing (PDM), to support the power division based MAC protocol which the NOMA belongs to. In PDM, we consider the transmit power is divided into multiple power segments (PSs) similar to the time-slots/sub-bands in TDM/FDM. The multiple PSs are used to concurrently deliver different informations in a same channel. By analysis, we prove that PDM outperforms TDM and FDM with regard to QoS requirement. Thus, the proposed PDM has potentials for the future cellular network.

Heterodyne-interference-type optical fiber hydrophone time division multiplexing array and demodulation method

Abstract: A heterodyne-interference-type optical fiber hydrophone time division multiplexing array and a demodulation method are disclosed. The optical fiber hydrophone time division multiplexing array comprises a narrow linewidth laser, a first coupler, a first acoustic-optical modulator, a second acoustic-optical modulator, a first optical fiber delay ring, a second coupler, a first circulator, a second circulator, a first photoelectric detector, a second photoelectric detector, a reference probe and a hydrophone sensing array. The sensing array adopts a parallel structure. Pulse light enters into each probe of the array through the delay ring in a time sharing mode so as to generate a sensing light signal. The reference probe is used for generating a reference light signal. The sensing light signal and the reference light signal are collected by the photoelectric detectors and then are converted into analog electronic signals. A signal demodulation module is used to carry out analog-to-digital conversion on the signals respectively. An arc tangent algorithm is used to resolve a submarine sound signal perceived by the sensing array.