DocumentCode :
345669
Title :
Linear-conjugate/linear filtering for interference rejection in multi-rate DS/CDMA systems
Author :
Buzzi, Stefano ; Lops, Marco ; Tulino, Antonia M.
Author_Institution :
Dipt. di Ingegneria Elettronica e delle Telecommun., Univ. degli Studi di Napoli Federico II, Italy
fYear :
1999
fDate :
1999
Firstpage :
654
Abstract :
In this work we introduce a new multiuser detector for interference suppression in DS/CDMA systems, based on the minimization of a modified MMSE-like cost function, and which may possibly entail an independent processing of the data and of their complex conjugate. The proposed detection structure is then specialized to the relevant case that the interference consists of a secondary CDMA network whose bit-rate is slower than that of the primary network: interestingly, interference suppression entails a periodically time-varying (PTV) detection rule. We also address the issue of adaptive detection, and present a new RLS algorithm suited for the tracking of the PTV solution. As to the performance assessment, we give a closed-form formula for the system error probability, while numerical results show that the new detection structure, and its adaptive version, outperform previously known receivers
Keywords :
adaptive signal detection; code division multiple access; digital filters; error statistics; interference suppression; least mean squares methods; radio receivers; radiofrequency interference; spread spectrum communication; tracking; PTV detection rule; RLS algorithm; adaptive detection; bit-rate; closed-form formula; complex conjugation; detection structure; interference rejection; interference suppression; linear filtering; linear-conjugate; modified MMSE-like cost function; multi-rate DS/CDMA systems; multiuser detector; periodically time-varying detection rule; secondary CDMA network; system error probability; tracking; Bit rate; Cost function; Detectors; Error probability; Interchannel interference; Maximum likelihood detection; Multiaccess communication; Multiple access interference; Telecommunications; Wireless networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE
Conference_Location :
New Orleans, LA
ISSN :
1525-3511
Print_ISBN :
0-7803-5668-3
Type :
conf
DOI :
10.1109/WCNC.1999.796725
Filename :
796725
Link To Document :
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