A Modified Schmidl-Cox OFDM Timing Detector

TL;DR

This paper introduces a simple modification to the Schmidl-Cox OFDM timing detector that enhances stability during signal transitions, normalizes its metric for easier thresholding, and improves its SNR performance.

Contribution

The paper presents a novel modification to the Schmidl-Cox detector that stabilizes timing detection during signal transitions and standardizes its metric scale.

Findings

Stabilized timing detection during no-signal to signal transitions.

Normalized detector metric between 0 and 1 for all scenarios.

Improved timing detector SNR performance.

Abstract

We describe a simple modification of the Schmidl-Cox detector for establishing timing in OFDM transmissions that stabilizes performance in transitions from no-signal to signal, or vice-versa. Moreover, the proposed modification scales the detector's metric between 0 and 1 for all scenarios, simplifying threshold setting, and improves timing detector SNR.