Title :
Blind interference suppression for DS-CDMA
Author_Institution :
Dept. of Electr. & Comput. Eng., San Diego State Univ., CA, USA
Abstract :
The use of a blind scheme for suppressing interference in direct-sequence code-division multiple-access (DS/CDMA) communication systems is investigated. In particular, we use a blind version of the partial-bit DS-CDMA receiver to successfully suppress narrow-band and near-far multiple-access interference without requiring knowledge of other users´ spreading codes, timing or phase information. Performance results for a 23 user/100 chip BPSK DS/CDMA system indicate that the blind partial-bit DS/CDMA receiver using as little as 33 taps can suppress narrow-band and near-far multiple-access interference, either at the beginning of a transmission or during transmission as interferers gain access to the system
Keywords :
code division multiple access; fading channels; interference suppression; multipath channels; multiuser channels; radio receivers; radiofrequency interference; spread spectrum communication; BPSK; blind interference suppression; blind partial-bit DS/CDMA receiver; direct-sequence code-division multiple-access; multipath fading channels; narrow-band interference; near-far multiple-access interference; performance results; secure communication systems; signal models; Binary phase shift keying; Drives; Interference suppression; Multiaccess communication; Multiple access interference; Narrowband; Power control; Pressing; Spread spectrum communication; Timing;
Conference_Titel :
Military Communications Conference, 1998. MILCOM 98. Proceedings., IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4506-1
DOI :
10.1109/MILCOM.1998.726922
