Noise estimation method and noise estimation device of multipath channel

A technology of noise estimation and channel estimation, applied in multi-frequency code systems, shaping networks in transmitter/receiver, baseband system components, etc., can solve the problem of high complexity and achieve the effect of reducing complexity

Active Publication Date: 2010-01-13
ALTO BEAM (CHINA) INC
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Problems solved by technology

[0005] The present invention aims to provide a noise estimation method for a multipath channel, which can solve the problem that the noise estimation method using the signal subspace needs to perform high-order statistics on the received signal and has high complexity in the related art

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  • Noise estimation method and noise estimation device of multipath channel
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  • Noise estimation method and noise estimation device of multipath channel

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Embodiment Construction

[0015] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0016] figure 1 A flow chart showing a noise estimation method according to the first embodiment of the present invention includes the following steps:

[0017] Step S10, perform channel estimation on the multipath channel, and obtain the time domain response estimation value h(l) of each path channel of the multipath channel, where l=0, 1, ..., L-1;

[0018] Step S20, setting the noise threshold P T ;

[0019] Step S30, select the power |h(l)| 2 below the noise threshold P T , and calculate the noise estimation value P of the multipath channel according to the time domain response estimation value of the selected path N .

[0020] In the above-mentioned embodiment, channel estimation is first performed on the multipath channel to obtain the time-domain response estimation value h(l) of each path channel of the multipath channe...

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Abstract

The invention provides a noise estimation method of a multipath channel, comprising the following steps: carrying out channel estimation for the multipath channel to obtain a time domain response estimation value of each path channel of the multipath channel; setting a noise threshold; selecting paths of all paths of the each path channel, which have the power lower than the noise threshold, and computing a noise estimation value of the multipath channel according to the time domain response estimation values of the selected paths. The invention solves the problem that a noise estimation method utilizing signal subspace needs to carry out higher-order statistics for received signals in a correlation technique and has higher complexity, thereby achieving the effect on reducing channel noise estimation complexity.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for estimating noise of a multipath channel. Background technique [0002] In a wireless communication system, the signal-to-noise ratio is the ratio of the average power of the signal output by the receiving end to the average power of the noise. , channel decoding, etc. Among them, the noise average power can be obtained by noise estimation of the channel, so the noise estimation of the channel is a crucial technology in wireless communication. [0003] For wireless communication systems with multipath and time-varying channels, related technologies provide a noise estimation method based on OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) using signal subspace. [0004] In the process of realizing the present invention, the inventors found that the noise estimation method using the signal subspace ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L25/02H04L27/26
Inventor 曾朝煌施婷婷
Owner ALTO BEAM (CHINA) INC
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