SC-FDE

About: SC-FDE is a research topic. Over the lifetime, 438 publications have been published within this topic receiving 7547 citations.

Reverberation Chamber Environment for Testing Communication Systems: Applications to OFDM and SC-FDE

Abstract: The impulse response in a reverberation chamber is investigated from an experimental and theoretical point of view. A full description is thus proposed based on measurements and confirmed by means of theoretical insights. In particular, the K factor of each tap is emphasized. BER simulations for OFDM and single carrier frequency domain equalization (SC-FDE) systems are applied on this channel model and compared to the 802.11n channel model showing some differences mainly for the OFDM transmission.

Peak-to-average power ratio of SC-FDMA systems with localized subcarrier mapping

Abstract: Single carrier frequency division multiple access (SC-FDMA), which combines the single carrier frequency domain equalization (SC-FDE) and frequency division multiple access (FDMA) techniques is a promising broadband wireless access scheme However, previous research has shown that the peak-to-average power ratio (PAPR) of SC-FDMA is high especially in the case of localized subcarrier mapping In this paper, we simulate and analyze the PAPR for SC-FDMA with two subcarrier mapping schemes known as Localized FDMA (LFDMA) and Interleaved FDMA (IFDMA) respectively, and evaluate the PAPR performance of users assigned on different subcarriers in LFDMA To reduce the PAPR, we propose an efficient clipping-based PAPR reduction algorithm Simulation results show that with a small degradation in the system bit error rate (BER) performance the proposed scheme can achieve around 2dB PAPR reduction for LFDMA

A Burst SC-FDE Scheme for High-Speed Communication Based on Radar

Abstract: Recently the radar-based communication has aroused a great interest in the military and academia due to its great potential in increasing performance and reducing costs. However, the application of high-speed data transmission over radar antennas requires a burst waveform robust to nonlinear power amplifiers and multipath propagation effects. Our solution is to apply burst single-carrier frequency domain equalization (SC-FDE) for data transmission, which co-exists with radar equipments in time-division multiplexing mode. In this paper, we present a system that contains a training preamble and lots of data blocks. Based on the training preamble, a joint algorithm is proposed for fast synchronization. Moreover, signals are phase-modulated to combat the effects of nonlinear analog circuits and unique words are inserted between data blocks as guard intervals to eliminate inter block interference. The proposed scheme is evaluated by both simulations and field experimental demonstrations, where bit error rate

Low-Complexity SC-FDE Techniques for Massive MIMO Schemes With Low-Resolution ADCs

Abstract: Massive multiple-input multiple-output (mMIMO) systems are very important for 5G since they are one of the main enablers of the targeted huge capacity gains. On the other hand, the power consumption at the mobile terminals should be as low as possible, making single-carrier waveforms, such as single carrier with frequency-domain equalization (SC-FDE), particularly interesting, since the transmit signals can have a low peak-to-average power ratio (PAPR), allowing a highly efficient power amplification. However, the combination of mMIMO systems with SC-FDE modulations gives rise to implementation difficulties at the receiver side. On one hand, the equalization procedure should avoid matrix inversions, but this might lead to performance degradation. On the other hand, low-resolution analog-to-digital converters (ADCs) should be employed in each receive branch to reduce the implementation complexity, which might lead to severe nonlinear distortion effects. In this work, we study analytically the performance of mMIMO systems based on SC-FDE schemes employing low-complexity, iterative FDE receivers, and low-resolution ADCs. It is shown that the performance degradation associated to low-resolution ADCs can be tolerable if the number of receive antennas is larger than the number of transmit antennas, even when low-complexity FDE receivers are employed.

Wireless communication using ultrasound through metal barriers: Experiment and analysis

Abstract: Many industrial applications need transmission of information through metal barriers without physical penetrations Conventional wireless communication is ineffective due to the Faraday shielding effect Ultrasound can be used to convey information in this situation To achieve lower power consumption and higher data rate simultaneously, an ultrasonic communication system based on single-carrier frequency domain equalization (SC-FDE) has been proposed Compared with conventional ultrasonic communication systems based on orthogonal frequency division multiplexing (OFDM), it has a lower peak-to-average power ratio while maintaining a similar performance in anti-multipath fading Unique word sequences are used to realize the frame synchronization and to estimate the communication channel characteristics A prototype system has been implemented on a field programmable gate array and a digital signal processor It gets an effective bit rate of 436 kbps through a steel barrier within the thickness of 70 mm, and higher data rate will be achieved by using higher frequency channels or higher order modulation methods Due to the low-complexity merit of the transmitter, the proposed system could work for a long time even under battery-powered conditions, which makes it practical for many industrial applications