On Error-Constrained Data Throughput of Rapid Symbol Duration Adaptation with Imperfect Channel Information

Abstract

This paper quantitatively analyzes the effect of noisy outdated channel estimation on symbol-by-symbol (SBS) adaptation. We consider a rudimentary yet simple duration adaptation policy, which prescribes the momentary symbol rate as a linear function of the channel estimation. We present an optimization of such a simple policy to have an error-constrained data throughput as high as possible. The results shows that even with such a rudimentary adaptation policy and with a simple channel estimation scheme, the SBS adaptation achieves significant throughput gains over a frame-by-frame (FBF) adaptation.