Hardware

A Low Power Preamble Detection Methodology for Packet Based Modems

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Executive Summary

In order to achieve frame synchronization in packetbased communication systems, a known sequence (Preamble) is sent at the beginning of each packet. This paper presents a low power scheme for preamble detection using dynamic precision configuration. The proposed scheme is based on the observation that signal processing algorithms at the front end including mixer, Square Root Raised Cosine (SRRC) matched filter and Code Matched Filter (CMF) of the receiver, can be operated with minimum precision during the acquisition phase without incurring significant acquisition performance degradation.

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