Linear MMSE interference suppression in asynchronous random-CDMA

Author

Yoon, Young C.

Author_Institution

Centre for Wireless Commun., Waterloo Univ., Ont., Canada

Volume

2

fYear

2000

fDate

2000

Firstpage

1465

Abstract

This paper considers interference suppression, based on linear minimum mean square error (MMSE) filtering, in random code-division multiple-access (random-CDMA) systems such as IS-95 and wideband-CDMA using long pseudo-noise (PN) sequences. It examines the design of the MMSE receiver and its performance in terms of probability of bit error (P_e). Expressions for P_e are derived for systems with multiple bit rates (and spreading factors), variable signal powers and chip pulse shaping. Numerical examples show substantial P_e gains in systems with one to two high-powered users and square-root raised cosine (Sqrt-RC) pulse shaping with 100% excess bandwidth

Keywords

AWGN channels; broadband networks; code division multiple access; error statistics; filtering theory; interference suppression; land mobile radio; least mean squares methods; pseudonoise codes; pulse shaping; radio networks; radio receivers; radiofrequency interference; random processes; sequences; AWGN channel; IS-95; MMSE receiver; PN sequences; SNR; asynchronous random-CDMA systems; bit error probability; chip pulse shaping; excess bandwidth; high-powered users; linear MMSE filtering; linear MMSE interference suppression; long pseudo-noise sequences; minimum mean square error; multiple bit rates; performance; random code-division multiple-access; spreading factors; square-root raised cosine pulse shaping; system model; variable signal powers; wideband-CDMA; AWGN; Bit rate; Filtering; Interference suppression; Multiaccess communication; Multiple access interference; Nonlinear filters; Performance analysis; Pulse shaping methods; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st

Conference_Location

Tokyo

ISSN

1090-3038

Print_ISBN

0-7803-5718-3

Type

conf

DOI

10.1109/VETECS.2000.851369

Filename

851369