Coded FQPSK and SOQPSK with iterative detection

Perrins, Erik; Nelson, Tom; Rice, Michael

doi:10.1109/milcom.2005.1606141

Cited by 7 publications

(5 citation statements)

References 23 publications

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“…There were several methods for detection FQPSK [8][9][10][11][12] , including symbol by symbol detector and optimal detector. The CEEFQPSK is derived from the FQPSK.…”

Section: Performance Analysis and Simulationmentioning

confidence: 99%

A novel modulation for mobile satellite communications

Xie

Bian

et al. 2011

J. Electron.(China)

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It is a challenging problem to design a high performance modulation for mobile satellite communications due to the limited power and bandwidth resource. The paper improves Feher patented Quadrature Phase Shift Keying (FQPSK) by redefining the waveform. The novel FQPSK, with constant envelope, can be used to improve the power efficiency and frequency efficiency of mobile satellite communication. The study shows that the improved FQPSK outperforms conventional FQPSK over AWGN and is immune to the non-linearity of high power amplifier. At last, the impact of flat fading and multi-path fading of channel on the BER performance of improved modulation is analyzed.

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“…There were several methods for detection FQPSK [8][9][10][11][12] , including symbol by symbol detector and optimal detector. The CEEFQPSK is derived from the FQPSK.…”

Section: Performance Analysis and Simulationmentioning

confidence: 99%

A novel modulation for mobile satellite communications

Xie

Bian

et al. 2011

J. Electron.(China)

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“…Unfortunately, there is any specific decoding algorithm in the paper. Paper [13] investigated the performance coded FQPSK in which it is presented as continuous phase modulation (CPM) by Laurent decomposition. Due to the fact that FQPSK can't be decomposed into closed form, the results only are approximative.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimize FQPSK Modulation Concatenated with LDPC Code for Space Information Network

Xie¹,

He²,

Hu³

et al. 2015

Proceedings of the 4th International Conference on Information Technology and Management Innovation

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Because of the limited power and long propagation distance between spacecraft and Earth station, the high power efficiency is more important for space information system than others terrestrial communication system. Motivated by the potentially large gain achievable with iterative decoding, one novel coded modulation scheme based on LDPC code and FQPSK (Feher's QPSK) is designed and optimized in this paper, which can alleviate the challenge of signal power huge loss of communications path in space information system. The novel scheme improves power efficiency utilizing the property that LDPC code enables communication at very low signal noise rate and constant envelope property of FQPSK enables high power amplifier work at saturation states without nonlinear impact. At receiver, using iterative receive algorithm, large gain can be attained. The paper proposes concatenation scheme and optimizes it by computer assisted simulation. At last, the bit error rate performance of optimal scheme is confirmed.

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“…The proposed scheme for CEEFQPSK makes better bit error rate (BER) performance than FQPSK does both in additional white Gaussian noise (AWGN) and non-linear channels. In [3,4], the FQPSK is considered as a trellis-coded modulation which is concatenated with an outer code to improve the power efficiency by using low-complexity iterative detection.…”

Section: Introductionmentioning

confidence: 99%

Low‐density parity‐check‐Feher quadrature phase shift keying signalling with frequency‐offset compensated iterative demodulation and decoding algorithm

Yang

et al. 2014

IET Communications

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Coded FQPSK and SOQPSK with iterative detection

Cited by 7 publications

References 23 publications

A novel modulation for mobile satellite communications

A novel modulation for mobile satellite communications

Design and Optimize FQPSK Modulation Concatenated with LDPC Code for Space Information Network

Low‐density parity‐check‐Feher quadrature phase shift keying signalling with frequency‐offset compensated iterative demodulation and decoding algorithm

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