Method and system for wireless channel measurement based on wavelet decomposition threshold de-nosing

A wavelet decomposition and wireless channel technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as impulse response errors
CN102594472AInactive Publication Date: 2012-07-18BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and a system for wireless channel measurement based on wavelet decomposition threshold de-nosing. The method includes the following steps: (1) using a spread spectrum sliding correlation method to finish wireless channel measurement so as to obtain channel impulse response containing noise, (2) conducting multi-resolution wavelet decomposition for the channel impulse response and leading the channel impulse response to be converted from time domain to wavelet domain, (3) reasonably selecting a threshold function and a threshold and processing wavelet coefficients corresponding to the noise according to the threshold function; (4) conducting wavelet reconstruction and leading the de-noised channel impulse response to be converted from the wavelet domain back to the time domain, and (5) storing the de-noised channel impulse response for researching channel characteristics. Through steps of wavelet decomposition, threshold de-nosing, wavelet reconstruction and the like, the method and the system can reduce interference on the channel impulse response caused by the noise, improve accuracy and effectiveness of channel measurement results, and provide reliable data basis for follow-up researching of channel characteristics.
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Description

technical field

[0001] The present invention relates to the field of wireless mobile communication, in particular to a method and device for wireless channel measurement based on wavelet decomposition threshold denoising. Background technique

[0002] Wireless channel is a key factor affecting the performance of wireless mobile communication system. The characteristics of wireless channels in space-time correlation, frequency selectivity and many other aspects pose challenges to the design of mobile communication systems. Therefore, the study of wireless channel propagation characteristics is the premise and key to the study of new mobile communication technologies.

[0003] The best way to understand the real channel characteristics is to measure the wireless channel in various actual geographical environments, and it is widely used by countries all over the world. Commonly used wireless channel measurement methods include direct pulse measurement, frequency domain channe...

Claims

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