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Method and device for generating ZC (Zadoff-Chu) sequence

A generation method and technology of a generation device, applied in multiplexing code generation, code division multiplexing system, electrical components, etc., can solve the problem of consuming large computing time and achieve the effect of reducing storage space

Active Publication Date: 2015-04-08
北京中科晶上科技股份有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the CORDIC algorithm requires multiple iterations, which consumes a relatively large calculation time for DSP.

Method used

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  • Method and device for generating ZC (Zadoff-Chu) sequence
  • Method and device for generating ZC (Zadoff-Chu) sequence
  • Method and device for generating ZC (Zadoff-Chu) sequence

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Embodiment Construction

[0047] In order to provide a solution that can avoid a large amount of storage space and multiple iterative operations, thereby using DSP to quickly generate a ZC sequence, the inventor first conducted an in-depth study on the ZC sequence itself, and extracted several features of the ZC sequence. nature. In order to illustrate the principle of the present invention more clearly, several properties of the aforementioned ZC sequence are described first.

[0048] First, a ZC sequence can be decomposed into the product of multiple ZC sequences. This is due to the fact that the ZC sequence is entirely composed of exponential functions. When the root index u of the ZC sequence is decomposed as follows

[0049] u = Σ m = 0 M - 1 p m r m - ...

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Abstract

The invention provides a method for generating a ZC (Zadoff-Chu) sequence. The method comprises the following steps: (1) determining a current radical exponent according to the radical exponent of the ZC sequence needing to be generated; (2) decomposing the current radial exponent into an expression of the weights and forms of seed sequence radical exponents in a seed sequence set, wherein weight coefficients in the expression are non-negative integers; the seed sequence set is a set of pre-stored ZC sequences having different radical exponents; and each ZC sequence stored in the seed sequence set is a seed sequence; and (3) multiplying corresponding seed sequences according to the weight coefficients obtained in the step (2) to obtain a ZC sequence corresponding to the current radical exponent in order to obtain the ZC sequence needing to be generated. The invention further provides a corresponding device for generating the ZC sequence. Through adoption of the method and the device, ZC sequences of any radical exponent can be generated rapidly and accurately; storage space required in the generating process of the ZC sequences can be reduced; and the method and the device are particularly suitable for rapidly generating the ZC sequences through a DSP (Digital Signal Processor).

Description

technical field [0001] The present invention relates to the field of wireless communication and digital signal processing, in particular, the present invention relates to a method and device for generating a ZC sequence. Background technique [0002] In a wireless communication system, a base station and a user terminal often need to send some pilot signals to each other for synchronization of the communication system and channel estimation. The pilot sequence generally has good autocorrelation and cross-correlation characteristics, so that the receiving end can know the timing information and channel conditions of the sending end in advance through the detection of the pilot sequence, so as to improve the accuracy of data reception at the receiving end. sex. [0003] The ZC sequence (Zadoff-Chu sequence) has good autocorrelation and cross-correlation characteristics, so it was selected as the 3rd Generation Partnership Project (The 3rd Generation Partnership Project, 3GPP)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/00H04J13/14
Inventor 林江南解凯苏泳涛周一青石晶林冯雪林
Owner 北京中科晶上科技股份有限公司
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