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Method and apparatus for postprocessing channel estimation

A channel estimation and channel technology, applied in baseband system components and other directions, can solve the problems of channel information loss, difficulty in determining the optimal value, affecting receiver performance, etc., to achieve the effect of improving performance

Inactive Publication Date: 2010-12-22
ST ERICSSON SEMICON BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of these two combining methods have a certain purposelessness, and the selection of the threshold value can only be obtained by experience or simulation, and it is difficult to determine the optimal value, and some smaller effective Taps cannot be preserved, resulting in loss of channel information, which further affects the performance of the entire receiver

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  • Method and apparatus for postprocessing channel estimation
  • Method and apparatus for postprocessing channel estimation
  • Method and apparatus for postprocessing channel estimation

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Embodiment Construction

[0021] In order to make the purpose, steps and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] The purpose of the present invention is to estimate the channel impulse response h from the channel Accurately recovered, because the higher the signal-to-noise ratio, the channel estimation The higher the degree of proximity to the channel impulse response h, the basic principle according to the present invention is to select one or more channel estimates on the same channel based on the principle of improving the signal-to-noise ratio; combine the selected channel estimates, thereby Obtain a channel estimate with the highest SNR; then perform denoising on the channel estimate with the highest SNR to obtain a final channel estimate, which can remove most or all invalid taps and retain Smaller effective taps improve receiver performance.

[0023] Wherein, the chann...

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Abstract

The invention provides a channel estimation post treatment method, including: step S1, one or more channel estimations to one channel are selected based on the principle of making the signal-to-noise ratio of the combined channels to be the highest; stepS2, one or more channel estimations are combined so as to acquire a combined channel estimation; stepS3, noise in the combined channel estimationis removed. The channel estimation post treatment method has the advantages that the method can remove the majority or all of the ineffective pigtails while retaining the small pigtail, thus improving the performance of a receiver.

Description

technical field [0001] The present invention relates to time division synchronous code division multiple access (Time Division-Synchronous Code Division Multiple Access, TD-SDMA), in particular to a TD-SDMA physical layer channel estimation post-processing method and device. Background technique [0002] The physical layer channel of the third-generation mobile communication system Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system has a unique frame structure. figure 1 It is a structure diagram of TD-SCDMA wireless subframe. Such as figure 1 As shown, each subframe is composed of 7 regular time slots (TS0-TS6) and 3 special time slots with a length of 675 μs. On a Time Division Multiple Access (TDMA) channel, the format of information in one time slot is called a burst. The burst used by the TD-SCDMA system consists of two data blocks with a length of 352 chips (chip), a midamble with a length of 144 chips, and a guard interval (Guard Period, GP) w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
Inventor 厉正吉
Owner ST ERICSSON SEMICON BEIJING