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Multiple access communication method and device for selecting pseudo-random code sequence for spread spectrum

A pseudo-random code and multiple-access communication technology, applied in the field of multiple-access communication methods and devices, to achieve the effect of improving efficiency

Active Publication Date: 2020-08-04
西安宇飞电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing system, how to obtain multiple effective m-sequences for the communication system at the same time, and how to constrain the m-sequences to make the overall performance of the m-sequence group the best, the existing technology still needs to be studied

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  • Multiple access communication method and device for selecting pseudo-random code sequence for spread spectrum
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  • Multiple access communication method and device for selecting pseudo-random code sequence for spread spectrum

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Embodiment 1

[0051] Embodiment 1 of the present application provides a multiple access communication method for selecting a pseudo-random code sequence for spectrum spreading, such as figure 1 shown, including:

[0052] Step 110, in the spread spectrum communication, select the corresponding nonlinear sequence type according to the length of the spread spectrum code, if the length of the spread spectrum code in the spread spectrum system is 2^n bits then select to adopt the big M sequence, if it is 2^n -1 chooses to use the Gold sequence;

[0053] Among them, the large M sequence is derived from the small m sequence, that is, a zero value is inserted in the continuous n-1 zeros of the small m sequence; for example, the small m sequence is: m1=[1,0,0,0,1,1, 1,1,1,0,0,1,1,0,1,0,0,1,0,0,0,0,1,0,1,0,1,1,1,0,1] ; Then the big M sequence is: M1=[1,0,0,0,1,1,1,1,1,0,0,1,1,0,1,0,0,1,0,0, 0,0,0,1,0,1,0,1,1,1,0,1].

[0054] The Gold sequence is a composite code sequence of m sequences, which is ...

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Abstract

The invention discloses a multiple access communication method and device for selecting a pseudo-random code sequence for spread spectrum. The method comprises the following steps: in spread spectrumcommunication, selecting a corresponding pseudo-random code sequence type according to the length of a spread spectrum code, if the length of the spread spectrum code in a spread spectrum system is 2^n bits, selecting to adopt a large M sequence, and if the length of the spread spectrum code is 2^n-1 bits, selecting to adopt a Gold sequence; when a large M sequence is selected, searching m sequence optimization pairs from the large M sequence, and forming a large M sequence group with the lowest cross-correlation peak value to serve as a spreading code sequence; and when the Gold sequence is selected, searching a balanced Gold sequence of which the cross-correlation numerical value meets the three-valued characteristic from the Gold sequence to serve as a spreading code sequence. By adoption of the multiple access communication method and apparatus for selecting the pseudo-random code sequence for spread spectrum provided by the invention, multiple effective m sequences can be obtainedat the same time for spread spectrum communication, so that the spread spectrum communication efficiency is improved.

Description

technical field [0001] The present application relates to the field of communication technology, in particular to a multiple access communication method and device for selecting a pseudo-random code sequence for spectrum spreading. Background technique [0002] Spread Spectrum Communication (Spread Spectrum Communication) is to modulate the information data to be transmitted by a pseudo-random code (spread spectrum sequence: Spread Sequence), and then transmit after realizing spectrum expansion. The receiving end uses the same code for demodulation and related processing. Restore the original information data. Obviously, this communication method is opposite to the common narrowband communication method. After the spectrum is spread, the broadband communication is carried out, and the data is demodulated after the correlation processing returns to the narrowband. The spread spectrum communication method has many advantages, such as anti-interference, anti-noise, anti-multip...

Claims

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Application Information

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IPC IPC(8): H04J13/00H04B1/707
CPCH04J13/0029H04B1/707Y02D30/70
Inventor 熊军张志芳孙作亮
Owner 西安宇飞电子技术有限公司
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