Title :
APP demodulator for turbo coded multiple symbol differential detection under correlated Rayleigh fading channels
Author :
Vanichchanun, P. ; Sritiapetch, Chantima ; Nakpeerayuth, Suvit ; Wuttisittikulkij, Lunchakorn
Author_Institution :
Dept. of Electr. Eng., Chulalongkorn Univ., Bangkok, Thailand
fDate :
29 Nov.-3 Dec. 2004
Abstract :
In this paper, multiple symbol differential detection (MSDD) with iterative decoding (turbo decoding) of code rate 1/2 is developed to work under correlated slow and fast Rayleigh fading channels by using an APP demodulator with two different approaches. The first approach is to increase the number of the trellis states of differential encoders. In the second approach, the VA is modified and used to find a QPSK symbol sequence associated with each state for the APP demodulator.
Keywords :
Rayleigh channels; correlation methods; demodulators; differential detection; iterative decoding; quadrature phase shift keying; trellis codes; turbo codes; APP demodulator; MSDD; QPSK symbol sequence; code rate; correlated Rayleigh fading channels; correlated slow and fast Rayleigh fading channels; differential encoders; iterative decoding; multiple symbol differential detection; trellis states; turbo coded multiple symbol differential detection; AWGN channels; Demodulation; Fading; Iterative decoding; Phase detection; Phase shift keying; Propagation losses; Quadrature phase shift keying; Rayleigh channels; Turbo codes;
Conference_Titel :
Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE
Print_ISBN :
0-7803-8794-5
DOI :
10.1109/GLOCOM.2004.1378471
