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Method and apparatus for creating long scrambling code and phase offset code

A code phase offset and phase offset technology, which is applied in multiplexing code generation, code shifting or jumping, and code division multiplexing systems, can solve problems such as large resource consumption and complex system design, and achieve The system design is simple, easy to implement, and the effect of reducing the amount of data

Inactive Publication Date: 2008-01-02
ZTE CORP
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  • Claims
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Problems solved by technology

[0017] The object of the present invention is to provide a method and device for generating a long scrambling code phase offset codeword, which overcomes the disadvantages of large resource consumption and complicated system design in the above-mentioned long scrambling code phase offset codeword generation method

Method used

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  • Method and apparatus for creating long scrambling code and phase offset code
  • Method and apparatus for creating long scrambling code and phase offset code
  • Method and apparatus for creating long scrambling code and phase offset code

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0037] By adopting the long scrambling code phase offset codeword generating method of the present invention, the long scrambling codeword after the phase shift can be directly obtained by performing one rotation on the initial value of the long scrambling code sequence. The core idea of ​​the method of the present invention is: directly rotate the long scrambling code sequence X and Y of the current phase to obtain the C of the long scrambling code word after the phase offset long，l，n and C long，2，n sequence.

[0038] It can be seen from Figure 1 that C long，1，n and C long，2，n The sequence is obtained by adding some bits modulo 2 of the long scrambling code sequence X, Y, and C can be set long，1，n The result C of the modulo 2 addition of several taps of the X sequence long，1，x，n The result C of modulo 2 addition of several taps of the Y ...

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Abstract

The invention discloses a method for generating long scrambling code phase shift code, and a relative method, wherein the method comprises that using long scrambling code phase shift to find the phase rotary matrix of long scrambling code sequences X, Y, according to the matrix in the step A, rotating vector to obtain phase shift generation vector, according to the phase shift generation vector in the step B, rotating the long scrambling code sequences X, Y to obtain the sequence value after phase shift, generating the sequence values after phase shift, to generate long scrambling code with shift phase. The invention only uses four row vectors to complete the generation of long scrambling code phase shift code. Compared with register shift and matrix rotation long scrambling code sequence phase methods, the invention uses less data, with high speed, simple system, and easy application.

Description

technical field [0001] The present invention relates to a method and a device in the field of mobile communication, in particular to a method and a device for generating a long scrambling code phase offset code word in a wideband code division multiple access system. Background technique [0002] In the wideband code division multiple access communication system of the prior art, in order to anti-jamming, anti-multipath, anti-interception, secrecy, multi-access communication, synchronization, etc., a pseudo-random code sequence is used to encrypt the signal, that is, to Scramble the frequency signal. [0003] When the base station obtains the baseband signal sent by the user through radio frequency reception, it needs to perform an inverse operation of scrambling on the received baseband signal, that is, descrambling. In wideband code division multiple access communication systems, the uplink usually adopts the long scrambling code of the Gold code to realize signal scrambl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04L25/03H04J13/02H04B7/26H04J13/00H04J13/10
CPCH04J13/10H04J13/0074
Inventor 冯立国陈月峰梁戈超
Owner ZTE CORP
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