Title :
Interference suppression using cosine-modulated filter banks
Author :
Medley, Michael ; Saulnier, Gary ; Das, Pankaj K.
Abstract :
In order to mitigate narrow-band interference in spread spectrum communications systems, novel communications receivers incorporating transform domain filtering techniques are designed. In this paper, lapped transforms are used to transform the received data signal to the transform domain wherein adaptive excision is performed. Transform domain detection algorithms, which yield bit decisions based on the remaining signal energy, are analyzed and, together with excision, are employed on a block-by-block basis to suppress single-tone interference. System performance is analytically quantified in terms of the overall system bit error rate (BER). Subsequent results are presented for a variety of channel conditions and compared to those obtained using excision algorithms based on orthonormal block transforms
Keywords :
adaptive signal detection; band-pass filters; discrete cosine transforms; interference suppression; low-pass filters; receivers; spread spectrum communication; telecommunication channels; adaptive excision; bit decisions; block-by-block basis; channel conditions; communications receivers; cosine-modulated filter banks; interference suppression; lapped transforms; narrow-band interference; orthonormal block transforms; overall system bit error rate; signal energy; single-tone interference; spread spectrum communications systems; system performance; transform domain detection algorithms; transform domain filtering techniques; Algorithm design and analysis; Bit error rate; Detection algorithms; Filter bank; Filtering; Interference suppression; Narrowband; Signal analysis; Spread spectrum communication; System performance;
Conference_Titel :
Military Communications Conference, 1996. MILCOM '96, Conference Proceedings, IEEE
Conference_Location :
McLean, VA
Print_ISBN :
0-7803-3682-8
DOI :
10.1109/MILCOM.1996.571441