Channel estimation processing for performance improvement in low SNR regime

摘要

Disclosed is an improved channel estimation by post-processing of the channel response that is generated by a Golay correlator The processing is done using time-domain operations such as gating and filtering. Gating is performed on the estimated channel response taps in order to reduce the noise level. Pre-filtering the channel response through a filter matched to the transmitted pulse-shape improves the probability of detecting the channel peaks. Post-filtering the processed channel impulse response to eliminate the high frequency effects that are added by the windowing and gating operations.

主权项

1. A channel estimation method, comprising:
receiving a data stream transmitted over a channel from a device capable of performing wireless communications; generating a channel response of the received data stream by using a Golay correlator, wherein the Golay correlator generates a first Golay sequence (Ga) and a second Golay sequence (Gb); applying an overlap-add method to the first and second Golay sequences to generate a series of sequences; processing using time-domain operations the generated series of sequences to improve channel estimation generated by the Golay correlator.