Title :
Applications of space-time adaptive processing in wireless communications
Author :
Haimovich, A.M. ; Shah, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
This paper studies the application of space-time adaptive processing (STAP) to increase the performance of wireless communications. STAP applied to CDMA systems is an efficient means to increase the capacity by providing diversity paths to combat multipath and by suppressing interference through spatial-temporal filtering. STAP may also be used to harden commercial systems for military applications by rejecting narrowband interferences in overlay situations. The main advantage of interference suppression in the spatial domain is its robustness with respect to the interference bandwidth. The performance of several STAP architectures is reviewed. The performance of wireless systems with array processing or STAP is degraded by errors in the estimation of the covariance matrix due to finite sample effects. Full and reduced-rank methods are analyzed with respect to their robustness to finite sample effects
Keywords :
adaptive signal processing; array signal processing; cochannel interference; code division multiple access; covariance matrices; direction-of-arrival estimation; filtering theory; interference suppression; military communication; multipath channels; radio networks; signal sampling; CDMA systems; STAP; array processing; cochannel interference; commercial systems; covariance matrix estimation; diversity paths; finite sample effects; full-rank methods; interference bandwidth; interference suppression; military applications; multipath; narrowband interference; reduced-rank methods; space-time adaptive processing; spatial-temporal filtering; wireless communications; wireless systems; Array signal processing; Bandwidth; Degradation; Estimation error; Filtering; Interference suppression; Multiaccess communication; Narrowband; Robustness; Wireless communication;
Conference_Titel :
MILCOM 97 Proceedings
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4249-6
DOI :
10.1109/MILCOM.1997.644869