Title :
A novel receiver for DS-CDMA downlink
Author :
Hui, Huang ; Wu Lili ; Guisheng, Liao
Author_Institution :
Key Lab for Radar Signal Process., Xidian Univ., Xi´´an, China
Abstract :
In this paper, the method of detection for the DS-CDMA downlink operating in a frequency selective fading environment is considered. A novel detection method using constant modulus algorithm (CMA) is proposed. With the projection of the equalizer output on the unoccupied spreading codes being zero as a constraint condition, we give an adaptive and a batch linearly constrained CMAs. The proposed method can be used in periodic or aperiodic spreading system and overcomes the shortcoming that the conventional CMA cannot guarantee to converge to a desired user. Simulation results demonstrate that the proposed method offers high detection performance and is capable of combating both channel fading and multiple-access interference.
Keywords :
code division multiple access; fading channels; mobile radio; multiuser detection; radio links; radio receivers; radiofrequency interference; spread spectrum communication; CDMA receiver; DS-CDMA downlink; channel fading; constant modulus algorithm; detection method; equalizer output projection; frequency selective fading environment; multiple-access interference; multiuser detection; periodic spreading system; Base stations; Downlink; Equalizers; Fading; Filters; Multiaccess communication; Multiple access interference; Receiving antennas; Signal processing algorithms; Transmitting antennas;
Conference_Titel :
Communication Technology Proceedings, 2003. ICCT 2003. International Conference on
Print_ISBN :
7-5635-0686-1
DOI :
10.1109/ICCT.2003.1209690
