Trellis coded quantization/trellis coded continuous phase modulation over Rician channel with imperfect phase reference

Abstract

In this paper, to improve bandwidth efficiency and error performance. trellis coded quantization/trellis continuous phase modulation (TCQ/TCPM) are combined and a trellis coded quantization/trellis coded continuous phase modulation (TCQ/TCCPM) scheme is introduced. Here we use TCQ/TCM system as source coding because of its advantage over classical joint systems in terms of decoding time and complexity. We also present CPM for TCQ/TCM signals. since MM provides low spectral occupancy and is suitable for power and bandwidth limited channels. The bit error performance of TCQ/TCCPM schemes; is derived taking into account quantization noise over Rician channel with imperfect phase reference. The analytical upper bounds are obtained using Chernoff bounding technique. combined with the modified Generating functional approach with no channel state information (CSI) and no side information for the phase noise process. As an example. TCQ/TCCPM scheme for 16CPFSK with modulation index h = 1/2 (16CPFSK-TCQ/TCCPM) is investigated and compared to TCQ/TCM for 16PSK (16PSK-TCQ/TCM). It is shown that 16CPFSK-TCQ/TCCPM hits better bit error performance than 16PSK-TCQ/TCM in all signal-to-noise-ratio (SNR) and quantization noise effect increases at high SNR values for both uniform and optimum quantization. Copyright (C) 2004 AEL.