Single-Pole IIR Channel Power Prediction with Variable Delays

TL;DR

This paper analyzes a single-pole IIR predictor for wireless channel quality, deriving analytical expressions for its performance with variable delays and demonstrating its advantages for delays under 30 ms at low speeds.

Contribution

It provides the first analytical analysis of a single-pole IIR predictor with random feedback delays in wireless channels.

Findings

Prediction improves throughput for delays under 30 ms

Analytical expressions for MSE and filter parameters are derived

Performance benefits are confirmed through Monte Carlo simulations

Abstract

Exploiting outdated channel quality indicators is crucial in most adaptive wireless communication systems. This is often done through channel prediction based on previous received indicators. In this paper, we analyze the case where the feedback delay experienced by the quality indicators is not constant, but random. Focusing on a single-pole IIR predictor, we obtain analytical expressions for the MSE and the filter parameters, and study the throughput behavior through Monte Carlo simulations. Results show that prediction provides a performance advantage for average delays smaller than 30 ms for low terminal speeds.