Title :
Interference rejection in PN spread-spectrum systems with LS linear phase FIR filters
Author :
Theodoridis, S. ; Kalouptsidis, N. ; Proakis, J. ; Koyas, G.
Author_Institution :
Dept. of Comput. Eng., Patras Univ., Patra-Rio, Greece
fDate :
9/1/1989 12:00:00 AM
Abstract :
The effects of a narrowband interference present in a pseudonoise (PN) spread-spectrum system can be minimized by using digital whitening techniques. A new efficient block LS algorithm for the design of an FIR filter with linear phase is derived and used as a whitening filter. Simulations are carried out to demonstrate the effectiveness of the LS optimum linear-phase filter in suppressing a narrowband interference in a PN spread-spectrum system. Comparisons to previously used methods are made. The simulations showed an improvement in the output SNR on the order of 4-5 dB over already existing schemes
Keywords :
filtering and prediction theory; interference suppression; spread spectrum communication; LS linear phase FIR filters; digital whitening; interference rejection; narrowband interference; pseudonoise; spread-spectrum systems; whitening filter; Bandwidth; Filtering algorithms; Finite impulse response filter; Interference suppression; Matched filters; Narrowband; Nonlinear filters; Random sequences; Signal processing algorithms; Spread spectrum communication;
Journal_Title :
Communications, IEEE Transactions on
