Title :
Low complexity MAP detection using approximate LLR for CDMA iterative receivers
Author_Institution :
Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW, Australia
fDate :
5/1/2006 12:00:00 AM
Abstract :
In this letter, we approximate the log-likelihood ratio (LLR) to find computationally efficient detectors for the iterative receiver in code division multiple access (CDMA) systems. For approximation, a Taylor series of the LLR is considered. One of the well-known detectors is rederived using a first order approximation, while a new detector is found by a second order approximation.
Keywords :
approximation theory; code division multiple access; iterative decoding; maximum likelihood detection; probability; radio receivers; CDMA iterative receiver; LLR approximation; MAP detection; Taylor series; code division multiple access system; log-likelihood ratio; maximum aposteriori probability; AWGN; Additive white noise; Code division multiplexing; Detectors; Gaussian noise; Iterative decoding; Multiaccess communication; Signal sampling; Stacking; Taylor series;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2006.1633309
