Narrowband Interference Mitigation for MUOS

Narrowband interference mitigation in wideband channels is extremely challenging when prior knowledge of the interfering signal cannot be assumed at the receiver. TrellisWare Technologies, Inc.'s proposed solution employs Quantization-Based Estimation (QBE), which is a technique that leverages concepts from source coding theory in the definition of a universal interference signal estimator. When the interference power exceeds the spreading factor of the signal-of-interest (SOI) -- i.e., when addtional interference mitigation beyond that natively provided by the waveform is required -- a properly designed QBE filter can subtract an accurate reconstruction of the interfering waveform from the received signal. The SOI is then recovered by a suitably modified spread spectrum receiver.