Title :
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
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;
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
DOI :
10.1109/PIMRC.1996.568462
