New approach for interference excision in spread spectrum using time-frequency distributions

Moeness G. Amin; Gopal Venkatesan; Steve Tyler

doi:10.1117/12.211425

7 June 1995 New approach for interference excision in spread spectrum using time-frequency distributions

Moeness G. Amin, Gopal Venkatesan, Steve Tyler

Proceedings Volume 2563, Advanced Signal Processing Algorithms; (1995) https://doi.org/10.1117/12.211425
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The capability of the time-frequency distributions (TFDs) to properly represent a single as well as multiple component signals in time and frequency permits the application of a new approach for interference excision in spread spectrum communication systems. In this paper, the instantaneous frequency estimate from the TFD is used to construct a finite impulse response filter which substantially reduces the interference power with a minimum possible distortion of the desired signal. The proposed technique is therefore a case of open loop adaptive filtering. Three- and five-coefficient zero phase excision filters are considered. Closed form expressions of the improvement of SNR at the receiver correlator output using the TFD-based adaptive filtering are derived.

Citation Download Citation

Moeness G. Amin, Gopal Venkatesan, and Steve Tyler "New approach for interference excision in spread spectrum using time-frequency distributions", Proc. SPIE 2563, Advanced Signal Processing Algorithms, (7 June 1995); https://doi.org/10.1117/12.211425

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