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Survivor-by-Sequence Balance Method Using Data Reuse

An equalization method and sequence technology, applied in the direction of baseband system components, etc., can solve the problems of low algorithm complexity and inability to meet short burst signal equalization, and achieve the effect of satisfying equalization

Active Publication Date: 2017-05-17
SHANGHAI NORMAL UNIVERSITY
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  • Application Information

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. Therefore, it is necessary to find a method with a small number of symbols and a low algorithm complexity to meet the needs of short burst signal equalization.

Method used

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  • Survivor-by-Sequence Balance Method Using Data Reuse
  • Survivor-by-Sequence Balance Method Using Data Reuse
  • Survivor-by-Sequence Balance Method Using Data Reuse

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Embodiment Construction

[0013] The following further describes the present invention in conjunction with the drawings and embodiments

[0014] The survivor-by-survival sequence equalization method of the present invention using data reuse has the following steps:

[0015] Set the receiving sequence to be known.

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

[0017]

[0018] Where Z K Is the receiving sequence received by the receiving end, a K Is the launch sequence, W k Is signal noise, f m Is the channel parameter, X k Is the symbol received after passing the channel, L is the channel length, and k is the time.

[0019] Use the surviving sequence algorithm to equalize the update process of the channel estimation to realize the transmission sequence a K And channel f k Rough estimate,

[0020]

[0021]

[0022] among them, Is k for channel f k , Β is the step length, which is a decimal less than 1, e(μ k-1 →μ k ) Is the estimated error from ti...

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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 the short burst signal communication, a surviving sequence equalization method using data reuse is used to meet the requirement of using as few symbols as possible to achieve effective convergence of the equalization method. Background technique [0002] As we all know, because short-term burst signals have good adaptability, strong anti-interception ability and high confidentiality, this type of signal has been more and more widely used in military and civilian fields. The research on the receiving technology of burst signals 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 use of as few symbols as possible to achieve effective convergence of the equalization algo...

Claims

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Application Information

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