Multirate CDMA Receivers with Adaptive Antennas in Multipath Fading Channels

Author

Ueng, Fang-Biau ; Chen, Jun-Da ; Tsai, Shang-Chun ; Lin, Cen-Lan

Author_Institution

Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung

fYear

2006

fDate

Oct. 2006

Firstpage

1

Lastpage

5

Abstract

Smart antennas, with spatial processing, used in multirate code division multiple access (CDMA) systems can enhance range, reliability and capacity. In this paper, we propose three multirate methodologies, including variable processing gain, variable chip rate and multicode systems in adaptive antenna receiver structures for direct-sequence (DS) CDMA multiuser communications in multipath fading channels. Least mean square (LMS) algorithm is employed in narrowband and wideband receiver structures to adjust the spreading code coefficients. Simulation examples are given to compare the performances of the three proposed multirate receiver structures

Keywords

adaptive antenna arrays; code division multiple access; fading channels; least mean squares methods; multipath channels; multiuser channels; radio receivers; spread spectrum communication; LMS; adaptive antenna; direct-sequence code division multiple access; least mean square algorithm; multipath fading channel; multirate DS-CDMA receiver; multiuser communication; narrowband receiver structure; smart antenna; spatial processing; spreading code coefficient; wideband receiver structure; Adaptive arrays; Adaptive systems; Bandwidth; Broadband antennas; Fading; Gain; Multiaccess communication; Receiving antennas; System performance; Wiener filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication systems, 2006. ICCS 2006. 10th IEEE Singapore International Conference on

Conference_Location

Singapore

Print_ISBN

1-4244-0411-8

Electronic_ISBN

1-4244-0411-8

Type

conf

DOI

10.1109/ICCS.2006.301540

Filename

4085835