Comparative Study of Iterative Channel Estimation Schemes for Turbo Decoding with Antenna Diversity Reception in Rayleigh Fading

Deepshikha GARG
Fumiyuki ADACHI

IEICE TRANSACTIONS on Communications   Vol.E86-B    No.3    pp.1149-1152
Publication Date: 2003/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
turbo decoding,  pilot symbol,  iterative channel estimation,  iterative decoding,  

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Turbo decoding with coherent detection requires accurate channel estimation. In this paper, we consider outer-turbo channel estimation (OTCE), which carries out iterative channel estimation before turbo decoding, and inner-turbo channel estimation (ITCE), which incorporates iterative channel estimation into turbo decoding process. The average bit error rate (BER) performances with OTCE and ITCE in a frequency nonselective Rayleigh fading channel with antenna diversity reception are evaluated by means of computer simulations to be compared. It is found that although ITCE is superior to OTCE, OTCE provides the average BER performance very close to ITCE when dual antenna diversity reception is used.