Channel estimation algorithms for DS/BPSK-CDMA communications systems

Author

Bui, Minh Hung ; Azad, Hedayat ; Aghvami, A. Hmid

Author_Institution

Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

3

fYear

1996

fDate

15-18 Oct 1996

Firstpage

1145

Abstract

Different channel estimation algorithms for direct-sequence code-division multiple-access (DS/CDMA) communications systems using binary phase-shift-keying (BPSK) modulation and a RAKE receiver are evaluated under fading multipath conditions. Two strategies are considered: the transmission of a pilot signal in the downlink and the block organization of the data in the uplink. The performance degradation of the system is due mainly to inaccurate estimation of the complex amplitudes rather than the delays; it remains low when using pilot signals with averaging filters or combining preamble information with symbol estimation

Keywords

amplitude estimation; code division multiple access; delays; fading; filtering theory; multipath channels; phase shift keying; pseudonoise codes; radio links; radio receivers; signal processing; spread spectrum communication; DS/BPSK-CDMA communications systems; RAKE receiver; amplitude estimation; averaging filters; binary phase shift keying; blind signal processing; block data organization; channel estimation algorithms; delay estimation; direct sequence code division multiple access; downlink; fading multipath conditions; pilot signal transmission; preamble information; symbol estimation; system performance degradation; uplink; Amplitude estimation; Binary phase shift keying; Channel estimation; Delay estimation; Fading; Modulation coding; Multiaccess communication; Multipath channels; Phase modulation; Phase shift keying;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 1996. PIMRC'96., Seventh IEEE International Symposium on

Conference_Location

Taipei

Print_ISBN

0-7803-3692-5

Type

conf

DOI

10.1109/PIMRC.1996.568462

Filename

568462