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Method of adaptive updating coefficient of equalizing wave filter

An equalization filter, adaptive update technology, applied in the direction of adaptive network, digital technology network, impedance network, etc., can solve the increase of power consumption, increase the power consumption of DSP equalization filter, and the filtering effect of equalization filter 1' will not be There are great improvements and other problems to achieve the effect of reducing power consumption

Inactive Publication Date: 2006-06-28
CENT ACADEME OF SVA GROUP
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Problems solved by technology

In the case of little change in the multipath environment, the equalization filter coefficients generated each time will have little difference, and the filtering effect of the equalization filter 1' will not be greatly improved
Each update coefficient will increase the power consumption of the DSP and the power consumption of the equalization filter
As the update frequency gradually increases, this unnecessary power consumption will increase significantly

Method used

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  • Method of adaptive updating coefficient of equalizing wave filter
  • Method of adaptive updating coefficient of equalizing wave filter
  • Method of adaptive updating coefficient of equalizing wave filter

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Embodiment approach

[0046] Such as Figure 2 ~ Figure 4 As shown, the present invention provides a method for adaptive update of equalization filter coefficients, which is implemented by FPGA hardware and specifically includes the following steps:

[0047] Step 1. Send the data after equalization and filtering by the equalization filter 1 to the ghost cancellation reference signal correlation calculator 101 to perform correlation calculations to obtain correlation calculation values;

[0048] Step 2. Find the positions and values ​​of the peak and sub-peak values ​​of the correlation calculation value;

[0049] Step 3. By comparing with the peak threshold, obtain relevant value information that is higher than the peak threshold within a certain range near the peak;

[0050] Step 4. The over-threshold statistics module 102 performs over-threshold statistics on the related value information obtained in step 3, and judges whether the peak value is an over-threshold peak value;

[0051] Step 5. In a certa...

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Abstract

This invention provides a method for renewing the balance filter coefficient adaptively, which carries out the operation relating to the reference signals for eliminating double images to the digital series after being balanced and filtered to test the effect of anti-multipath match with the analyzed result in an anti-multipath system and judge if the coefficient of the balance filter should be renewed or the error should be reported.

Description

Technical field [0001] The invention belongs to the field of electronic engineering, and relates to a method for adaptive update of equalization filter coefficients, in particular to a method for adaptive update of equalization filter coefficients in an anti-multipath system. Background technique [0002] At the receiving end of the digital anti-multipath system, an equalization filter is provided, which performs equalization and filtering on the received signal to maximize the output signal-to-noise ratio. In general, the tap coefficients of the equalization filter have been constantly updated to adapt to the constantly changing multipath environment, such as figure 1 As shown, in this structure, the DSP (Digital Signal Processing) will continuously analyze the channel characteristics, and the equalization filter coefficient generation module 2'will continuously generate new equalization filter coefficients, and send them to the equalization filter 1'for update operation. In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02H03H21/00
Inventor 竺海安刘才勇顾大为侯钢王国中
Owner CENT ACADEME OF SVA GROUP
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