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Direct-Sequence/Spread-Spectrum Communication System with Sampling Rate Selection Diversity
Yohei SUZUKI Anas M. BOSTAMAM Mamiko INAMORI Yukitoshi SANADA
Publication
IEICE TRANSACTIONS on Communications
Vol.E91-B
No.1
pp.267-273 Publication Date: 2008/01/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.1.267 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: oversamping, diversity, direct-sequence/spread-spectrum (DS/SS), RAKE receiver, multipath channel, cognitive radio,
Full Text: PDF>>
Summary:
In this paper, sampling rate selection diversity (SRSD) scheme for Direct-Sequence/Spread-Spectrum (DS/SS) is proposed. In DS/SS communication systems, oversampling may be employed to increase the signal-to-noise ratio (SNR). However, oversampling enlarges the power consumption because signal processing of the receiver has to be carried out at a higher clock rate. Higher sampling rate does not always maximize the SNR. In the proposed SRSD scheme, the power consumption can be reduced by selecting the optimum sampling rate depending on the characteristics of the channel. The proposed SRSD scheme can also reduce the BER more than the conventional oversampling scheme under certain channel conditions.
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