Title :
Reduced rank noncoherent interference suppression for CDMA communications
Author :
Koc, Ali T. ; Ozdemir, Ozgur ; Torlak, Murat
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Richardson, TX, USA
Abstract :
Noncoherent receivers are used for frequency-selective fading channels where the estimation of channel is difficult. The channel estimation can be more cumbersome for asynchronous code division multiple access (A-CDMA) systems due to multiaccess interference. A noncoherent reduced rank receiver which has less complexity as compared to noncoherent full rank linear minimum mean square error (MMSE) receiver is proposed for A-CDMA systems. The receiver for multipath channels consists of a reduced rank filter and a decision feedback differential detector (DF-DD) for each path. A generic bit error rate formula is provided for noncoherent reduced rank multistage decision feedback differential detection scheme.
Keywords :
channel estimation; code division multiple access; error statistics; fading channels; least mean squares methods; multipath channels; radio receivers; radiofrequency interference; A-CDMA; DF-DD; asynchronous code division multiple access system; bit error rate formula; channel estimation; decision feedback differential detector; frequency-selective fading channel; multiaccess interference; multipath channel; multistage detection scheme; noncoherent reduced rank receiver; Channel estimation; Detectors; Feedback; Filters; Frequency estimation; Frequency-selective fading channels; Interference suppression; Mean square error methods; Multiaccess communication; Multipath channels;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth Asilomar Conference on
Print_ISBN :
0-7803-8622-1
DOI :
10.1109/ACSSC.2004.1399272
