It is well-known that opportunistic transmission schemes are sum- capacity optimal, in the Shannon sense, for symmetric cellular networks with single-antenna transceivers. However, for a practical system operating at non-negligible error probability, the correctly delivered throughput (or spectral efficiency) is a more useful figure- of-merit. In this paper, we present a mathematical model for the average throughput of a practical wireless system with channel-aware user scheduling in a symmetric Rayleigh fading cellular system. By employing an accurate model for the block error probability with turbo coding, and accounting for channel estimation errors, channel feedback quantization, and feedback delay, we present closed- form expressions for the average spectral efficiency of the downlink scheduler.
['Pengcheng Zhan', 'Ramesh Annavajjala', 'A.L. Swindlehurst', 'T. Chauvin']
A realistic performance analysis for practical channel-aware scheduling