Cochannel interference rejection in multipath channels

Yu-Ted Su*, Li Der Jeng, Fang Biau Ueng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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).

Original languageEnglish
Pages (from-to)1797-1804
Number of pages8
JournalIEICE Transactions on Communications
Issue number12
StatePublished - 25 Dec 1997


  • Adaptive filter
  • Interference suppression
  • Multipath fading
  • Spread spectrum communications

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