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A Novel Detection Scheme for Reducing the Effect of Residual Doppler Frequency Offset in Spread Spectrum Systems  

Yoo Seung-Soo (건국대학교 전자통신공학부)
Kim Sun-Yong (건국대학교 전자통신공학부)
Song Iick-Ho (한국과학기술대학교 전자전산학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.6A, 2006 , pp. 586-592 More about this Journal
Abstract
In this paper, a novel detection method called the joint multiple frequency cell (JMFC) detection is addressed for spread spectrum code acquisition in the presence of residual Doppler frequency offset (RDFO). When the RDFO exists, the correlation peak used for detection during the acquisition process is split into several lower neighboring peaks, resulting in severe degradation in the detection performance, and consequently, in the overall acquisition performance. In the JMFC detection, a decision variable for detection is formed by combining several consecutive correlator outputs, so that the reduction in the correlation value due to the RDFO can be alleviated. Numerical results show that the proposed scheme can offer better detection performance over the conventional scheme based on the cell-by-cell detection.
Keywords
Spread Spectrum; Code Acquisition; Residual Doppler Frequency Offset; JMFC;
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