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Low complexity MAP detection using approximate LLR for CDMA iterative receivers

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1 Author(s)
J. Choi ; Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW, Australia

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.

Published in:

IEEE Communications Letters  (Volume:10 ,  Issue: 5 )