Pre-survivor sequence balancing algorithm utilizing data reuse

A kind of equalization algorithm and sequence technology, applied in the direction of baseband system components, etc., can solve the problems of short burst signal equalization and low algorithm complexity, and achieve the effect of fast blind equalization and satisfying equalization.

Active Publication Date: 2014-11-05
SHANGHAI NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

The current equalization algorithm for data reuse is mainly through the combination of data reuse and conventional CMA equalization algorithm, the combination of data reuse and affine projection CMA algorithm, and the combination of data reuse and set membership filtering CMA algorithm, etc. The reduction from the order of thousands to the order of hundreds cannot meet the needs of short burst signal equalization, so it is necessary to find an algorithm that uses a small number of symbols and has low algorithm complexity to meet the needs of short burst signal equalization

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  • Pre-survivor sequence balancing algorithm utilizing data reuse
  • Pre-survivor sequence balancing algorithm utilizing data reuse
  • Pre-survivor sequence balancing algorithm utilizing data reuse

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing and embodiment the present invention is further described

[0014] A kind of surviving sequence equalization algorithm utilizing data reuse of the present invention, its steps are as follows:

[0015] Set the receive sequence to known.

[0016] According to the channel model of intersymbol interference, the receiving channel can be expressed as:

[0017] z k = x k + w k = Σ m = 0 L - 1 a k - m f m + w k k=0,1,2,...

[0018] Among them, Z K is the received sequence received by the receiver, ...

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Abstract

The invention discloses a pre-survivor sequence equalization algorithm utilizing data reuse, in particular the pre-survivor sequence equalization algorithm utilizing the data reuse in short burst signal communication to meet requirement for implementation of effective convergence of the equalization algorithm through adopting as fewer symbols as possible, and relates to the field of short burst communication technologies. The pre-survivor sequence equalization algorithm comprises the following steps of: setting a receiving sequence as a known receiving sequence; adopting a pre-survivor sequence algorithm to carry out estimation on an emitting sequence and carry out coarse estimation on a forward channel parameter synchronously; carrying out precise estimation on the forward channel parameter, adopting a single data vector cyclic reuse manner, utilizing the estimation of the emitting sequence and a coarse estimation result of a last forward channel receiving parameter to carry out iteration, and stopping when a value obtained by dividing an error mean square by a mean square value of the receiving sequence is smaller than a threshold; and converting the precise estimation of the forward channel parameter to coefficients of a linear balancer, and guiding the coefficients into a decision-directed least mean square to implement equalization. Through the steps, the pre-survivor sequence equalization algorithm utilizing the data reuse meets the requirement for equalization of short burst signals.

Description

technical field [0001] The present invention relates to the technical field of short burst communication, more specifically, in short burst signal communication, a sequence-by-survival equalization algorithm using data reuse is used to meet the requirement of using as few symbols as possible to achieve effective convergence of the equalization algorithm. Background technique [0002] As we all know, due to the good adaptability, strong anti-intercept ability and high confidentiality of short-term burst signals, this type of signal has been more and more widely used in military and civilian fields. The research on the receiving technology of burst signal has great theoretical significance and practical value. In view of the extensive use of short burst signals in communication, higher and higher requirements are put forward for the convergence speed of the equalization algorithm—that is, the effective convergence of the equalization algorithm is achieved by using as few symbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
Inventor 汪春梅孙洪波
Owner SHANGHAI NORMAL UNIVERSITY
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