H - Electricity – 03 – H
Patent
H - Electricity
03
H
H03H 2/00 (2006.01) H03H 17/00 (2006.01) H04B 1/707 (2006.01) H04J 13/00 (2006.01)
Patent
CA 2281863
A narrow band interference excision circuit for use in broadband digital data communication systems such as CDMA systems. The excision circuit is comprised of a matrix of polyphase filters that divide the input signal into a plurality of narrow subbands. Each narrow subband signal is examined to determine if narrowband interference exists in that bin. This is done preferably by taking the average of the absolute amplitude of the signals in the bin. If a signal in a bin has an absolute amplitude which far exceeds the average in the bin, the entire bin signal is eliminated. A bank of polyphase synthesis filters reassembles the composite signal. An equalization circuit with an error predictor comprised of an adaptive FIR filter and a correlator is coupled to adapt coefficients of the filter to colored noise and generate a colored noise cancellation signal to remove colored noise from the input to the slicer.
Rakib Selim Shlomo
Zarai Yoram
Johnson Ernest Peter
Terayon Communications Systems Inc.
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