The performance of turbo-codes in asynchronous DS-CDMA

In this paper, we consider orthogonal/turbo-codes for mobile asynchronous DS-CDMA communications. First, we investigate the performance of turbo-codes with perfect channel state information and without channel state information in AWGN and BSC channels. Then turbo-codes are applied to noncoherent M-...

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Bibliographic Details
Published inGLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record Vol. 3; pp. 1548 - 1551 vol.3
Main Authors Min Wang, Zhen-Song Wang, De-Rong Chen, Jia-Ru Lin
Format Conference Proceeding
LanguageEnglish
Published IEEE 1997
Subjects
Additive white noise
AWGN
Channel state information
Degradation
Fading
Gaussian noise
Mobile communication
Multiaccess communication
Multiple access interference
Turbo codes
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Summary:In this paper, we consider orthogonal/turbo-codes for mobile asynchronous DS-CDMA communications. First, we investigate the performance of turbo-codes with perfect channel state information and without channel state information in AWGN and BSC channels. Then turbo-codes are applied to noncoherent M-ary orthogonal modulation in multipath fading channels. It is shown that due to channel memory introduced by multipath fading and multiple access interference noise, the performance of turbo-codes degraded two orders. Another result is that turbo-codes prefer hard decision to optimum hard decision which is not the case in convolutional codes.
ISBN:9780780341982
0780341988
DOI:10.1109/GLOCOM.1997.644394