Performance of variable rate and variable power MQAM system based on bit error rate and channel estimates

Ong, Lay Teen; Shikh-Bahaei, Mohammad; Chambers, Jonathon; Lambotharan, Sangarapillai

Performance of variable rate and variable power MQAM system based on bit error rate and channel estimates

conference contribution

posted on 2009-12-08, 10:11 authored by Lay Teen Ong, Mohammad Shikh-Bahaei, Jonathon Chambers, Sangarapillai LambotharanSangarapillai Lambotharan

We consider the effect of an imperfect channel estimate on a variable rate and variable power (VRVP) multilevel quadrature amplitude modulation (MQAM) system, where the transmit power and data rate are varied relative to the estimate of the received signal. Based on the VRVPMQAM system operating over a Rayleigh flat-fading channel, we derive a bit error rate (BER) estimator using a maximum a posteriori (MAP) estimation approach. We apply the BER estimator to the VRVP-MQAM system, and thereby derive and obtain system expressions which are applicable to any channel estimation technique. In addition, the resulting formulations are also useful for analyzing the effect of channel state information (CSI). Consequently, we derive and obtain an optimal solution for our proposed system and generate numerical results to compare the variations of system performance with imperfect CSI.

History

School

Mechanical, Electrical and Manufacturing Engineering

Citation

ONG, L.T. ... et al., 2006. Performance of variable rate and variable power MQAM system based on bit error rate and channel estimates. IN: Proceedings of 2006 International Conference on Communications, Circuits and Systems, Guilin, China, 25-28 June, Vol.2, pp. 1402-1406.

Publisher

Version

VoR (Version of Record)

Publication date

2006

Notes

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