Performance Analysis of Multi-User Polar Coded CDMA system

Abstract

It is a well-known fact that as the number of users increase in a CDMA system, the bit error rate (BER) performance drops drastically. To overcome, such problems, forward error correction codes come to aid and BER performance is significantly improved. Recently, polar codes have gained much attention in the research which approach theoretical Shannon’s limit after turbo and low density and parity check (LDPC) codes. To the best of our knowledge, this paper presents the use of state of-the-art Polar codes in conjunction with CDMA system for the first time. It is observed that the polar coded CDMA systems outperform convolutional coded CDMA by the margin of more than 4dB under identical conditions. Successive cancellation (SC) decoder is used at the receiver nodes which has low decoding complexity and thus reduces receiver’s complexity.