Title :
DS/CDMA coherent detection system with a suppressed pilot channel
Author :
Abeta, Sadayuki ; Sampei, Seiichi ; Morinaga, Norihiko
Author_Institution :
Dept. of Commun. Eng., Osaka Univ., Japan
fDate :
28 Nov- 2 Dec 1994
Abstract :
This paper proposes a DS/CDMA coherent detection system using a suppressed pilot channel to achieve coherent RAKE diversity combining for up-link land mobile communication systems. At the receiver we apply a chip timing recovery scheme based on block demodulation and maximum likelihood estimation, and measure the complex delay profile. Proposed adaptive RAKE diversity performance in the case of QPSK is evaluated by computer simulation. As a result, the BER performance of the proposed system is superior to that of the conventional systems
Keywords :
Rayleigh channels; code division multiple access; delays; demodulation; digital radio; diversity reception; error statistics; fading; land mobile radio; maximum likelihood estimation; pseudonoise codes; quadrature phase shift keying; radio receivers; spread spectrum communication; synchronisation; BER performance; DS-CDMA; QPSK; RAKE diversity combining; Rayleigh fading; adaptive RAKE diversity performance; block demodulation; chip timing recovery scheme; coherent detection system; complex delay profile; computer simulation; direct sequence spread spectrum communication; maximum likelihood estimation; receiver; suppressed pilot channel; up-link land mobile communication systems; Delay estimation; Demodulation; Diversity reception; Maximum likelihood estimation; Mobile communication; Multiaccess communication; Quadrature phase shift keying; RAKE receivers; Semiconductor device measurement; Timing;
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
DOI :
10.1109/GLOCOM.1994.513150
