Compressed sensing ultra-wide band channel estimation method and system based on cluster position set

Abstract

The invention provides a compressed sensing ultra-wide band channel estimation method and system based on a cluster position set. The compressed sensing ultra-wide band channel estimation method includes the steps of channel cluster information acquisition and channel impact response estimation. The compressed sensing ultra-wide band channel estimation method has the advantages that the channel estimation method is composed of two stages, in the previous stage, the cluster structured characteristic of a channel is estimated, and feedback information is provided; in the later stage, cluster positions estimated in the previous stage are taken as the prior constraint in a channel impact response restructing algorithm, the quasi-static characteristic and the structured characteristic of the channel are fully used in the two stages, according to the quasi-static characteristic, in a period of time, the channel changes slowly, and it can be approximately thought that the channel does not change. According to the estimation method, based on a Bayes compressed sensing frame, it is unnecessary to know the sparse degree of the channel, the cluster position structure characteristic of the channel is integrated into the restructing algorithm, the complexity of implementing the estimation method is low, and the estimation performance is promoted to a certain degree in comparison with a traditional method.

Description

technical field [0001] The invention relates to the technical field of communication signal processing, in particular to a compressed sensing ultra-wideband channel estimation method and system based on a cluster position set. Background technique [0002] In recent years, Impulse Radio Ultra Wideband (IR-UWB), as a low-power, low-cost wireless communication technology that can achieve high-speed short-distance communication, precise ranging and positioning, and through-wall imaging, has received a lot of attention. extensive attention. Compared with other short-distance communication technologies, UWB technology has many advantages such as high data transmission rate, strong anti-interference ability, low transmission power, and simple receiver circuit design. Therefore, it is widely used in home office networks, industrial sensors, public safety, disasters Search and rescue, tracking and positioning and other fields have been greatly favored. At the same time, the resear...

AI Technical Summary

Problems solved by technology

The above schemes simply consider the sparsity of the channel, and the quasi-static characteristics and sparse structural features of the channel are not fully utilized, so that the estimation effect is not good.

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