BER Performance of OFDM-based 4096-QAM Using Soft Decision Viterbi Decoding in Multipath Fading

Abstract

Fifth-generation (5G) mobile systems are required to increase data rates. Higher-order quadrature amplitude modulation (QAM) can increase data rates within a limited bandwidth. This paper proposes orthogonal frequency division multiplexing (OFDM)-based 4096-QAM in 5G mobile systems. We present the BER performance of OFDM-based 4096-QAM using soft decision Viterbi decoding as parameters of the coding rate in multipath fading channels in comparison with existing QAM and quadrature phase shift keying. We also clarify the influence of phase error for OFDM-based 4096-QAM, i.e., the SNR penalty in the presence of phase error by link-level simulations.