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Cochannel Interference Rejection in Multipath Channels
Yu T. SU Li-Der JENG Fang-Biau UENG
Publication
IEICE TRANSACTIONS on Communications
Vol.E80-B
pp.1797-1804 Publication Date: 1997/12/25 Online ISSN:
DOI: Print ISSN: 0916-8516 Type of Manuscript: Category: Radio Communication Keyword: spread spectrum communications, interference suppression, adaptive filter, multipath fading,
Full Text: PDF>>
Summary:
In addition to additive thermal noise, a received direct-sequence spread spectrum (DS/SS) signal may suffer from intersymbol interference (ISI) and interference caused by cochannel narrowband users or other narrowband radio frequency interference (RFI). This paper presents a workable solution for removing narrowband interference (NBI) and reducing ISI or inter-chip interference (ICI) when the communication channel can be modeled as an FIR filter and the NBI comes from multiple CW tones, an AR-modeled Gaussian process, or a BPSK signal. Unlike earlier solutions, the proposed scheme is capable of performing the functions of NBI-rejection, ISI/ICI suppression and data detection (code despreading) simultaneously. It is easy to implement and, more importantly, it yields lower bit error rate (BER) and smaller mean squared error (MSE).
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