Title :
Improved space-time turbo codes with full spatial diversity over integer ring
Author :
Kim, Tae Min ; Lee, Jae Hong
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
In this paper, we propose the space-time turbo codes designed over integer ring for BPSK and QPSK modulation. The proposed space-time turbo codes achieve the full spatial diversity and can be decoded using the iterative diversity and can be decoded using the iterative binary soft-input soft-output (SISO) algorithm. The BPSK/QPSK binary rank criterion is used to find the interleavers, which guarantee the full spatial diversity. It is shown that the proposed codes have a signal-to-noise ratio (SNR) gain of 0.5 dB at FER of 10-3 over the space-time turbo codes with the iterative non-binary maximum a posteriori probability (MAP) decoding, proposed by Su and Geraniotis [H. Su and E. Geraniotis, Jan 2001], both in a quasi-static fading and in an independent Rayleigh fading channel.
Keywords :
Rayleigh channels; diversity reception; iterative decoding; maximum likelihood decoding; modulation coding; quadrature phase shift keying; space-time codes; turbo codes; 0.5 dB; BPSK modulation; MAP decoding; QPSK modulation; Rayleigh fading channel; SNR; a posteriori probability; binary rank criterion; integer ring; iterative binary SISO algorithm; quadrature phase shift keying; signal-to-noise ratio; soft-input soft-output; space-time turbo codes; spatial diversity; Binary phase shift keying; Fading; Gain; Iterative algorithms; Iterative decoding; Modulation coding; Quadrature phase shift keying; Rayleigh channels; Signal to noise ratio; Turbo codes;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207639
