Adaptive Subband Transforms in Time-Frequency Excisers for DSSS Communications Systems

Mehmet V. Tazebay, Ali N. Akansu

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

A smart time-frequency exciser for DSSS communications is proposed in this correspondence. This technique utilizes the concept of uncertainty in time-frequency analysis of signals. It brings the novel concept of domain switchable signal processing. Hence, the adaptive time-frequency (ATF) exciser has the capability of deciding the domain of the interference cancellation. Additionally, adaptive subband transforms are utilized for frequency domain excision. For time-domain excision, the ATF excision algorithm utilizes a sliding time window to reject the nonstationary, pulsed (time-localized) interference. It is shown that the proposed adaptive time-frequency exciser-based DSSS communications receiver drastically outperforms the existing systems. Its performance is nearly optimal and very robust to the inter and intradomain variations of the undesired signal.

Original languageEnglish (US)
Pages (from-to)2776-2782
Number of pages7
JournalIEEE Transactions on Signal Processing
Volume43
Issue number11
DOIs
StatePublished - Nov 1995

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

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