Nonwhite noise/interference rejection via blind adaptive filtering

摘要

The paper deals with the issue of non-invasive filtering of the non-white narrow-band interference within the spread spectrum signals. This is done in two steps. First, the signal plus interference, as one quantity and the replica, as the separate one - are whitened in parallel due to power spectrum of interference. Second, the obtained products are processed in accordance with ML cross-correlation principle. The simulation rejects the interference down to -20 dB for a signal-to-interference bandwidth ratio B/b ≈ 10. If the interference is not known, the adaptation is engaged.