Interference reduction in spread spectrum receivers

摘要

The specification and drawings present a new method, system, apparatus and software product for reducing a narrowband or continuous wave (CW) interference of weak radio frequency signals (e.g., code modulated) in the spread spectrum receivers. A tuneable digital band-reject filter can be placed inside of a receiving and processing module in a processing phase where, e.g., the word-length is large but before any rate-change operation that is causing aliasing. The tuneable digital band-reject filter can be placed after performing a pre-selected matched filtering of the digital signal (the digital signal is typically generated by an RF front end), before further processing involving the rate-change operation.