Abstract:

For the problems of multiple narrowband interferences and interferences with relatively large band in wide-band communication systems, an adaptive interference suppression algorithm based on the model of the generalized sidelobe canceler（GSC）is proposed. Constraining the detector to present a unit response to the desired user’s signature sequence, the detector is decomposed into corresponding constrained and unconstrained components. The unconstrained item is the desired user’s signature sequence and the constrained item is the linear combination of the null space of the signature sequence of the desired user. In the principle of the MOE, the algorithm adaptively adjusts the linear combination weights of the constrained item in order to suppress the interferences and detect the desired signal. Analysis and simulation show that the algorithm is less sensitive to the interference models.

Key words: Narrowband Interference, Kalman Filtering , Generalized Sidelobe Canceler