SISO FB-MAP Detection for Turbo-Coded Differential PSK Systems

For turbo-coded differential phase-shift-keying (DPSK) systems under correlated flat-fading channels, a serial iterative structure of soft-input-soft-output (SISO) forward/backward MAP (FB-MAP) detection and SISO decoder is proposed to reduce the computational complexity of MAP detection without per...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2009-11, Vol.58 (9), p.5288-5293
Main Authors: LO, Ching-Chi, SU, Szu-Lin
Format: Article
Language:English
Subjects:
Applied sciences
Bit error rate
Channels
Circuit properties
Coding, codes
Complexity
Computation
Computational complexity
Computational modeling
Computer simulation
Decoders
Degradation
Demodulation
Demodulators
Differential modulation
Differential quadrature phase shift keying
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Information, signal and communications theory
Iterative decoding
iterative detection and decoding
Iterative methods
iterative processing
maximum a posteriori (MAP) detection
Modulation, demodulation
Phase detection
Phase shift keying
Serials
Signal and communications theory
Signal convertors
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Turbo codes
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Description
Summary:For turbo-coded differential phase-shift-keying (DPSK) systems under correlated flat-fading channels, a serial iterative structure of soft-input-soft-output (SISO) forward/backward MAP (FB-MAP) detection and SISO decoder is proposed to reduce the computational complexity of MAP detection without performance degradation. The simulation results show that the FB-MAP detection scheme offers the same or better bit error rate (BER) performance with lower computational complexity when compared with the a posteriori probability (APP) demodulator, the SISO MAP detection, and the SISO multiple-symbol differential sphere decoder (MSDSD) scheme. Although the computational complexity is higher than the iterative filtered multiple differential detection (IF-MDD) scheme, the proposed detection scheme can have better BER performance.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2009.2028233