Title :
Filtered spreading sequences for interference avoidance
Author :
Davis, Mark E. ; Milstein, Laurence B.
Author_Institution :
Dept. of ECE, California Univ., San Diego, CA, USA
fDate :
29 Sep-1 Oct 1992
Abstract :
Due to the scarcity of available spectrum, it may be convenient to overlay a DS-spread spectrum system on a band already sparsely occupied by narrowband users. The processing gain of the spread system serves to reduce the cross-interference between the spread and narrowband systems. However, much further isolation can be gained by passing the spreading sequence through a short FIR filter at the transmitter, before spreading. The authors investigate the benefit of doing this, and give numerical results for a specific system
Keywords :
binary sequences; code division multiple access; digital filters; interference suppression; radiofrequency interference; spread spectrum communication; BPSK system; DS-CDMA network; DS-spread spectrum system; FIR filter; cross-interference; filtered spreading sequences; interference avoidance; Artificial intelligence; Binary phase shift keying; Finite impulse response filter; Interference; Multiaccess communication; Narrowband; Power system modeling; Radio frequency; Timing; Transversal filters;
Conference_Titel :
Universal Personal Communications, 1992. ICUPC '92 Proceedings., 1st International Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-0591-4
DOI :
10.1109/ICUPC.1992.240821
