Parallel Distributed Arithmetic Based K-Best List Sphere Detection Algorithm for LTE Standard

Abstract

3GPP Long Term Evolution (LTE) is the upcoming standard for cellular mobile communication. To meet the requirements of high data rate and low latency interactive services, Orthogonal Frequency Division Multiplexing (OFDM) in combination with MIMO is used. From a bit error rate (BER) performance perspective, maximum likelihood (ML) detection is the preferred detection method for multiple input multiple output (MIMO) communication systems. However, for high transmission rates, the K-best algorithm provides close-to-ML bit error rate (BER) performance with its iterative tree search, while its circuit complexity is reduced compared to an exhaustive search. In this paper, Distributed Arithmetic (DA) using parallel architecture based K-best List Sphere Detector (LSD) for a 3GPP LTE receiver is presented. About 50% of the computation time can be decreased and increase in speed with the help of this architecture.