Block error rate performance analysis of RS coded M-QAM modulated coherent OFDM-FSO system

Anbarasi, K.; Hemanth, C.; Sangeetha, R.

doi:10.1007/s11082-022-04328-w

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…To address this challenge, significant research effort has been put into comparing modulation formats and digital signal processing (DSP) techniques to see how they compare. For instance, there have been reports of quadrature amplitude modulation (QAM) [6], orthogonal frequency division multiplexing (OFDM) [7], differential phase shift keying (DQPSK) [6] and sub-carrier intensity modulation [8]. More recently, the performance of carrierless amplitude and phase modulation (CAP) modulation has been evaluated in an FSO link [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Real-Time FSO System Utilizing Xia and SRRC Pulses in Multi-Band Carrier-Less Amplitude and Phase Modulation

Haigh,

Abadi,

Ghassemlooy

et al. 2024

IEEE Access

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In this paper, we investigate the impact of two pulse shapes on the performance of a real-time free-space optical communication link. The two candidate pulse shapes are the square -root raised cosine and Xia pulse, respectively which are tested as the basis function for multi-band carrier-less amplitude and phase modulation. We first develop a real-time system based on a Xilinx Zynq ZCU102 system -on-chip platform utilising a high-resolution analogue-to-digital-converter. We then generate multi-band carrier-less amplitude and phase modulation formats using it and test the error vector magnitude whilst varying parameters. We emulate the fog environment utilising neutral density filters and evaluate the error performance of the link under increasingly poor visibility conditions. We show that contrary to previous reports, the SRR C pulse shape offers superior performance over the first-order Xia pulse in the FSO environment operating at data rates exceeding 1 Gb/s.

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Section: Introductionmentioning

confidence: 99%

Analysis of a Real-Time FSO System Utilizing Xia and SRRC Pulses in Multi-Band Carrier-Less Amplitude and Phase Modulation

Haigh,

Abadi,

Ghassemlooy

et al. 2024

IEEE Access

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“…Obviously, in the literature, no previous work had compared the performance of FFT-based, DWT-based, and FrFT-based STBC-OFDM systems. OFDM based radio over free space optics technology is becoming a effective alternative for 5G applications [19][20]. Similarly non-orthogonal multiple access system (NOMA) based wireless communication systems support high end multi-media application requirement of 5G and 6G systems [21].…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of STBC-OFDM system using different transforms over LOS and NLOS channel

Kansal,

Mounir

2023

Preprint

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Modern day users demand a robust communication that too an elevated data rate. These expectations can only be fulfilled by a hybrid combination of multiplexing techniques likes of orthogonal frequency division multiplexing (OFDM) and multiple input multiple output (MIMO) antenna systems. OFDM methodology takes care of elevated data rate requirements whereas MIMO facilitate the enhanced reliability, low bit error rate (BER) and higher spectral efficiency characteristics. The performance of conventional MIMO-OFDM system can further be enhanced by utilizing various transforms like fractional Fourier transform (FrFT) or discrete wavelet transform (DWT) in place of traditional fast Fourier transform (FFT) in OFDM. A comprehensive analysis of bit error rate (BER) and spectral efficiency for conventional MIMO-OFDM system based on FFT, FrFT, and DWT has been presented in this paper. The simulated outcome shows a significant reduction in BER and improvement in spectral efficiency in the DWT-based MIMO-OFDM system.

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Flexible real-time gigabit free-space optic demonstrator

Haigh,

Abadi,

Ghassemlooy

et al. 2024

Opt Quant Electron

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Block error rate performance analysis of RS coded M-QAM modulated coherent OFDM-FSO system

Cited by 5 publications

References 23 publications

Analysis of a Real-Time FSO System Utilizing Xia and SRRC Pulses in Multi-Band Carrier-Less Amplitude and Phase Modulation

Analysis of a Real-Time FSO System Utilizing Xia and SRRC Pulses in Multi-Band Carrier-Less Amplitude and Phase Modulation

Performance assessment of STBC-OFDM system using different transforms over LOS and NLOS channel

Flexible real-time gigabit free-space optic demonstrator

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