Title :
A convex projections method for improved narrow-band interference rejection in direct-sequence spread-spectrum systems
Author :
Narayanan, Krishna R. ; Doherty, John F.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
7/1/1997 12:00:00 AM
Abstract :
A method is presented for enhancing the narrow-band interference rejection capability of direct-sequence spread-spectrum systems employing an adaptive notch filter. The method, based on projection onto convex sets, restores that part of the spread-spectrum signal distorted by the filter. Simulation results are presented which show the output bit-error rate (BER) improvement gained by using the signal restoration scheme
Keywords :
adaptive filters; adaptive signal processing; coding errors; error statistics; filtering theory; interference suppression; notch filters; pseudonoise codes; radiofrequency interference; signal reconstruction; signal restoration; spread spectrum communication; BER; POCS; adaptive notch filter; convex projections method; direct-sequence spread-spectrum systems; narrowband interference rejection; output bit-error rate; projection onto convex sets; signal reconstruction; signal restoration; simulation results; spread-spectrum signal; Adaptive filters; Bit error rate; Interference; Mathematical model; Narrowband; Nonlinear distortion; Nonlinear filters; Signal restoration; Spread spectrum communication; Wideband;
Journal_Title :
Communications, IEEE Transactions on
