Subspace-based approaches for narrowband interference suppression in DS spread spectrum systems

It has been shown that the narrowband (NB) interference suppression capabil ity of a direct sequence (DS) spread spectrum system can be enhanced consid erably by processing the received signal via a subspace based prediction er ror filter. In this paper, a new interference-suppression method utilizing a subspace-based interpolation error filter is presented. The performance o f DS spread spectrum communication systems in the presence of NB interferen ce is studied when linear interpolation filters are employed for the estima tion and-subsequent suppression of the interference. The advantages of line ar interpolation filters over linear prediction filters with an identical n umber of taps are examined. (C) 2000 The Franklin Institute. Published by E lsevier Science Ltd. All rights reserved.