Title :
On a new scheme of reference signal generating method for interference suppression in DS-spread spectrum system
Author :
Lee, Bong ; Essman, Joseph
Author_Institution :
Ohio Univ., Athens, OH, USA
fDate :
30 Sep-3 Oct 1990
Abstract :
A reference signal generating loop scheme that improves interference suppression performance in direct-sequence (DS) spread-spectrum systems is proposed. The method makes use of a scaler Wiener filtering technique in the Walsh-Hadamard transform domain. Since it is not based on time-averaging methods, as are methods using a low-pass or chip decision filter, the burst of errors due to the time-delayed reference signal is nearly nonexistent, and the chip error probability is significantly reduced. Simulation results verify that the proposed reference signal is not time-delayed and that an intermittent scattering of errors occurs instead of a burst of errors, even in a high noise environment
Keywords :
filtering and prediction theory; interference suppression; signal synthesis; spread spectrum communication; DS-spread spectrum system; Walsh-Hadamard transform; chip error probability; high noise environment; interference suppression; reference signal generating loop; scaler Wiener filtering; Degradation; Delay; Error probability; Interference suppression; Low pass filters; Narrowband; Signal generators; Spread spectrum communication; Transversal filters; Wiener filter;
Conference_Titel :
Military Communications Conference, 1990. MILCOM '90, Conference Record, A New Era. 1990 IEEE
Conference_Location :
Monterey, CA
DOI :
10.1109/MILCOM.1990.117516
