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A method for generating pseudo-random long codes

A pseudo-random and pseudo-random sequence technology, applied in the field of pseudo-random long code generation, can solve problems such as large hardware resources, application limitations, and complex hardware equipment at the receiving end, and achieve the effect of reducing hardware resources and reducing the complexity of hardware implementation

Active Publication Date: 2021-03-02
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the hardware resources required for receiving with matched filters will be a lot
Especially in the scenario where fast synchronization of long codes is required, the hardware equipment at the receiving end will become very complicated, which limits the application

Method used

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  • A method for generating pseudo-random long codes
  • A method for generating pseudo-random long codes

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, further describe the present invention through embodiment, but do not limit the scope of the present invention in any way.

[0020] The invention provides a method for generating a pseudo-random long code, that is, the multiplication of m and M sequences is used as the pseudo-random long code.

[0021] figure 1 It is a flow chart of the method steps of the present invention. The following embodiments adopt the long-period pseudo-random sequence generated by the method of the present invention as the pilot sequence of the burst communication system, and the length of the pilot sequence is about 4000; the specific implementation of generating the pilot sequence includes the following steps:

[0022] Step 1, according to the approximate length of the pilot sequence, list the periodic combination pairs of all m and M sequences (the period of the m sequence is expressed as N 1 = 2 m -1, the M sequence period is expressed as ...

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Abstract

The invention discloses a method for generating a pseudo-random long code, belonging to the technical field of communication, that is, a long-period pseudo-random sequence is formed by multiplying an m-sequence and an M-sequence. Compared with the existing traditional methods, the present invention directly adopts long-period m-sequences or truncated m-sequences as pseudo-random sequences, which can realize fast capture of sequences with little hardware equipment cost, and greatly reduce hardware resources consumed by matched filtering at the receiving end . The pseudo-random long code generated by the present invention is very suitable for use as a pilot sequence and a spread spectrum sequence, and is applied to such as burst communication, direct sequence spread spectrum communication, pseudo code positioning system, etc., and is especially suitable for scenarios requiring fast acquisition.

Description

technical field [0001] The invention belongs to the technical field of communication and relates to a method for generating a pseudo-random long code. Background technique [0002] Pseudo-random sequences are also called pseudo-random codes, which have random characteristics and are widely used in the fields of communication and information. [0003] Pseudorandom sequences can usually be generated by linear shift registers. Currently, commonly used pseudo-random sequences include m-sequence (longest linear feedback shift register sequence), M-sequence (longest non-linear feedback shift register sequence), Gold sequence, Kasami sequence and so on. [0004] For the generation of pseudo-random long codes, the existing conventional practice is to directly use long-period m-sequences or truncated m-sequences. In this case, a lot of hardware resources are required for receiving with a matched filter. Especially in the scenario where fast synchronization of long codes is require...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/00H04J13/10
CPCH04J13/0025H04J13/10
Inventor 蒋伟洪一帆乐天罗武
Owner PEKING UNIV
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