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High-speed digital receiver parallel adaptive blind equalizing method

A digital receiver, self-adaptive technology, applied in baseband system components, electrical components, transmission systems, etc., can solve problems such as the inability to achieve high-speed equalization

Inactive Publication Date: 2007-08-22
TSINGHUA UNIV
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Problems solved by technology

Moreover, the parallel method can also overcome the problem that high-speed equalization cannot be achieved due to hardware speed limitations.

Method used

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  • High-speed digital receiver parallel adaptive blind equalizing method
  • High-speed digital receiver parallel adaptive blind equalizing method
  • High-speed digital receiver parallel adaptive blind equalizing method

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[0020]In high-speed digital communication, when the channel changes rapidly, it is difficult to track accurately, and high-speed transmission will bring large signal group delay distortion, the initial adjustment of the tap coefficient of the equalizer has nothing to do with the training sequence, that is, self-recovery or "Blind" recovery. See J.G. Proakis, Digital Communications, 4th ed., McGraw-Hill Inc. N.Y., 2001. In addition, it operates on each data symbol, and the training process is uninterrupted, so the blind algorithm will better adapt to the situation of channel time variation and large group delay distortion. The most commonly used algorithm for blind equalization is CMA, which was developed by D.N.Godard in D.N.Godard, "Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems", IEEE Trans.on Communications, vol.COM-28, Nov.1980: 1867 - Proposed in 1875. The CMA method mainly minimizes the defined non-convex cost function, ...

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Abstract

A parallel-adaptive blind balancing method of high speed digital receiver includes utilizing iteration calculation error vector of K number iteration calculation to update tap weight coefficient of balancer and carrying out L path of parallel-adaptive blind balancing treatment on input serial data according to minimum mean square error rule with L being number of parallel path.

Description

technical field [0001] The invention relates to a parallel self-adaptive blind equalization method of a high-speed digital receiver, belonging to the technical field of digital communication. Background technique [0002] In the field of digital communication, receiving signals under fading channel conditions needs to consider the intersymbol interference caused by channel distortion, and to solve this problem requires equalization, that is, a method of reliably recovering the symbol stream from the received signal. In this approach, the equalization process is generally adaptive, ie the equalized symbol stream needs to be input to such a system. These systems automatically adapt the transfer function of the equalizer to the channel conditions to recover the constellation points of the symbol stream. In many circumstances, the adaptive equalization process proceeds in at least two phases or modes of operation: (a) an initial acquisition phase and (b) a tracking phase. Duri...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L29/02
Inventor 詹亚锋包建荣邢腾飞陆建华
Owner TSINGHUA UNIV
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