Journal ArticleDOI
Hadamard precoding for PAPR reduction in optical direct detection OFDM systems
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TLDR
A novel method based on Hadamard precoding is proposed to reduce the peak-to-average power ratio in optical direct detection OFDM system and is successfully applied to an experimental system of optical direct-detection OFDM signal transmission through fiber.Abstract:
The high peak-to-average power ration (PAPR) values of optical orthogond frequency division multiplexing (OFDM) signal limit the system nonlinear tolerance (NLT). In this paper, a novel method based on Hadamard precoding is proposed to reduce the peak-to-average power ratio in optical direct detection OFDM system. The proposed scheme is successfully applied to an experimental system of optical direct-detection OFDM signal transmission through fiber. In this experiment, the 2.5 Gbit/s binary phase shift keying (BPSK) optical OFDM signals with Hadamard precoding are generated and transmitted though a single mode fiber. The experimental results show that the proposed scheme can reduce PAPR by almost 1.5 dB. Meantime the received sensitivity is improved by 2 dB with 100 km fiber transmission compared with that of an ordinary optical direct detection OFDM system.read more
Citations
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OFDM for Optical Communications
TL;DR: This paper gives a tutorial overview of OFDM highlighting the aspects that are likely to be important in optical applications and the constraints imposed by single mode optical fiber, multimode optical fiber and optical wireless.
Journal ArticleDOI
Chaotic Walsh–Hadamard Transform for Physical Layer Security in OFDM-PON
TL;DR: In this article, the authors proposed and experimentally demonstrated an approach to jointly enhance the physical layer security and improve an optical orthogonal frequency division multiplexing (O-OFDM) transmission in passive optical network.
Journal ArticleDOI
PAPR reduction of optical OFDM signals in visible light communications
TL;DR: In this paper, a Vandermonde-like matrix (VLM) pre-coding approach is proposed to reduce the high peak-to-average power ratio (PAPR) of DC-biased optical OFDM (DCO-OFDM) and asymmetrically clipped OFDM signals in visible light communications.
Journal ArticleDOI
Combining discrete cosine transform with clipping for PAPR reduction in intensity-modulated OFDM systems
TL;DR: It is experimentally demonstrated that the optical OFDM transmission system with this proposed scheme can achieve significant performance improvement in terms of PAPR and bit error rate compared with the original optical OfDM systems.
Journal ArticleDOI
Grouped DCT precoding for PAPR reduction in optical direct detection OFDM systems
TL;DR: A new grouped precoding technique based on discrete cosine transform (DCT) is presented for peak to average power ratio (PAPR) reduction of optical intensity modulated/direct detection (IM/DD) orthogonal frequency division multiplexing (OFDM) system.
References
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Journal ArticleDOI
Reducing the peak-to-average power ratio of multicarrier modulation by selected mapping
TL;DR: A method for the reduction of peak-to-average transmit power ratio of multicarrier modulation systems, called selected mapping, is presented, which is appropriate for a wide range of applications.
Journal ArticleDOI
OFDM for Optical Communications
TL;DR: In this paper, the authors give a tutorial overview of OFDM and highlight the aspects that are likely to be important in optical applications, and discuss the constraints imposed by single mode optical fiber, multimode optical fiber and optical wireless.
Journal ArticleDOI
OFDM with reduced peak-to-average power ratio by optimum combination of partial transmit sequences
Stefan Müller,Johannes B. Huber +1 more
TL;DR: In this paper, the authors proposed a very effective and flexible peak power reduction scheme for orthogonal frequency division multiplexing (OFDM) with almost vanishing redundancy, which works with arbitrary numbers of subcarriers and unconstrained signal sets.
Journal ArticleDOI
Effects of clipping and filtering on the performance of OFDM
Xiaodong Li,Leonard J. Cimini +1 more
TL;DR: This work investigates, through extensive computer simulations, the effects of clipping and filtering on the performance of OFDM, including the power spectral density, the crest factor, and the bit-error rate.
Journal ArticleDOI
Linear constellation precoding for OFDM with maximum multipath diversity and coding gains
TL;DR: This paper introduces linear constellation precoding for OFDM transmissions over frequency-selective fading channels by exploiting the correlation structure of OFDM subchannels to perform optimal subcarrier grouping and revealing its performance merits.
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