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

A channel estimation and compressed sensing technology, applied in the direction of baseband system components, etc., can solve the problems of insufficient utilization of channel quasi-static characteristics and sparse structural features, poor estimation effect, etc.

Inactive Publication Date: 2014-11-26
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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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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  • Compressed sensing ultra-wide band channel estimation method and system based on cluster position set
  • Compressed sensing ultra-wide band channel estimation method and system based on cluster position set
  • Compressed sensing ultra-wide band channel estimation method and system based on cluster position set

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Embodiment Construction

[0030] refer to figure 1 , the system architecture of the present invention includes three parts: a transmitter, a multipath channel, and a receiver. The transmitter part includes an information bit generation module, a modulation and signaling control module, a pulse shaping module, and a transmitting antenna, and the signal is radiated by the transmitting antenna; The multipath channel is the object to be estimated in the present invention; the receiver part includes a receiving antenna, an analog front end, and a digital back end. Among them, the analog front-end involves the compressed sampling and quantization of the received signal, and the digital back-end mainly performs calculation processing on the compressed sampling sequence obtained by the analog front-end. In the whole process of channel estimation, the analog front-end is divided into two stages to perform two independent compression measurements. The first stage is the channel cluster information acquisition st...

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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...

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Application Information

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IPC IPC(8): H04L25/02
Inventor 吴绍华刘松李杨王野张钦宇
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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