How accurate channel prediction needs to be for adaptive modulation in Rayleigh MIMO channels?

Shengli Zhou, Georgios B. Giannakis

Research output: Contribution to journalConference article

2 Scopus citations

Abstract

Adaptive modulation improves the system throughput considerably by matching transmitter parameters to time-varying wireless fading channels, Crucial to adaptive modulation is the quality of channel state information (CSI) at the transmitter. In this paper, we consider a channel predictor based on pilot symbol assisted modulation (PSAM) for multi-input multi-output (MIMO) Rayleigh fading channels. We analyze the impact of the channel prediction error on the bit error rate (BER) performance of an adaptive system assuming perfect CSI. Our numerical results reveal the critical value of the normalized prediction error, below which the predicted channels can be treated as perfect by the adaptive modulator; otherwise, explicit consideration of the channel imperfection must be accounted for at the transmitter.

Original languageEnglish (US)
Pages (from-to)81-84
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume4
StatePublished - Sep 25 2003
Event2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hong Kong
Duration: Apr 6 2003Apr 10 2003

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