NDLI: Interpolation lattice filters for narrowband interference cancellation in PN spread spectrum communication systems

Content Provider	IEEE Xplore Digital Library
Author	Jenq-Nan Lee Jenq-Tay Yuan
Copyright Year	2000
Description	Author affiliation: Dept. of Comput. Sci., Nat. Taiwan Ocean Univ., Keelung, Taiwan (Jenq-Nan Lee)
Abstract	Previous work on the adaptive lattice filters for narrowband interference rejection in a direct sequence (DS) spread spectrum communication system has centered around the use of one-sided prediction only. For two-sided interpolation, that is known to achieve better interference rejection than its one-sided counterpart, only the least-mean-squared (LMS) algorithms have been considered thus far in the literature. However, the LMS algorithm has an extremely slow convergence rate. Consequently, the two-sided interpolation filters using the LMS algorithm may not be applicable for suppression of narrowband interference with a time-variant frequency. In this paper, an order-recursive QR-decomposition-based least squares lattice (QRD-LSL) interpolation filter is presented as a solution to the narrowband interference rejection in a DS spread spectrum system. Computer simulation results show that the QRD-LSL interpolation filters can achieve excellent performance in terms of convergence speed as well as SNR improvement for a multiple tone interference with random phase and second-order autoregressive (AR) interference.
Starting Page	107
Ending Page	111
File Size	534922
Page Count	5
File Format	PDF
ISBN	0780365607
DOI	10.1109/ISSSTA.2000.878091
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-09-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interpolation Lattices Narrowband Least squares approximation Spread spectrum communication Adaptive filters Interference suppression Frequency Least squares methods Computer simulation
Content Type	Text
Resource Type	Article

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