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Selection method for cross-correlation sequence

A cross-correlation and sequence technology, applied in the field of communication, can solve the problem of large space and achieve the effect of reducing the probability of false alarm, reducing the probability of position, and narrowing the range of correlation length

Active Publication Date: 2019-04-12
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Large space for saving data

Method used

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  • Selection method for cross-correlation sequence

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Embodiment Construction

[0014] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0015] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0016] figure 1 is a method for selecting a cross-correlation sequence according to a preferred embodiment of the present invention. In this embodiment, first, under various typical channel models, the relationship between the cross-correlation length of the synchronization sequence and the synchronization time of the synchronization probability is simulated, and the correlation length L is limited to 4 / 9N to 1 / 2N accordin...

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Abstract

The invention discloses a selection method for a cross-correlation sequence. The cross-correlation sequence is stored at a receiver end of a communication system and is used for carrying out cross-correlation operation on received data and carrying out data frame synchronization detection. An integral sample sequence for selecting the cross-correlation sequence is preset at the receiver end. A length of the integral sample sequence is N. The selection method for the cross-correlation sequence comprises the step of limiting a length L of the cross-correlation sequence at 4 / 9N-1 / 2N. Under the condition that a synchronization detection effect is not influenced, complexity of the cross-correlation operation is reduced, operation efficiency is improved, and system power consumption is reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for selecting a mutual correlation sequence. Background technique [0002] In communication systems, signal synchronization is an essential job for receivers. Synchronization can take the autocorrelation of the received signal, or the cross-correlation of the received signal with the local signal. [0003] The synchronous method of autocorrelation is to sample the received signal, and then perform autocorrelation calculation after a sufficient number of samples are collected to find the correlation peak. All the sample points in the calculation of this method are obtained by sampling at the receiving end, and there is no need to save the relevant sequence in advance. However, the synchronization establishment time of autocorrelation synchronization is longer, and it will be affected by the sampling accuracy of the correlation sequence. [0004] The synchronization method of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 张晓辉周春良王连成李铮
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY