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ZC sequence generation method and apparatus

A sequence, NZC-1 technology, applied in the field of communication, can solve the problems of high complexity, complex hardware implementation, insufficient hardware area and power consumption, etc.

Active Publication Date: 2018-08-14
BEIJING XIAOMI PINECONE ELECTRONICS CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

However, the implementation method with reduced complexity still cannot avoid using at least one of the multiplier and the divider in the use of hardware, so the hardware area and power consumption are still not low enough
And in the existing improvement methods, generally all are to the realization of the simplified ZC sequence, that is, k=0 in the default formula (1), which is aimed at the ZC sequence in LTE or NB-IOT, and for the general ZC The implementation method of the sequence, that is, the implementation method of the ZC sequence in the case of k≠0 has not been improved. The implementation method of the general ZC sequence is still very complicated, the hardware implementation is complicated, the implementation area is large, and the power consumption is high.

Method used

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  • ZC sequence generation method and apparatus

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Embodiment Construction

[0046] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0047] figure 1 is a flowchart of a method for generating a ZC sequence shown according to an exemplary embodiment of the present disclosure, as shown in figure 1 As shown, the method includes steps 101 to 103.

[0048] In step 101, when the generated length is N ZC , the ZC sequence with the serial number n, perform double recursive operation on the function f(n) and function g(n) by the following formula to obtain f(n-1) and g(n-1):

[0049] f(n+1)=f(n)+g(n) (2)

[0050] Among them, f(n)=qn(n+1)+2qkn, g(n)=2qn+2q(1+k), q is the root index in the ZC sequence, k is any integer, 0ZC -1.

[0051] a length N ZC The general formula of the ZC sequence is sho...

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Abstract

The invention relates to a ZC sequence generation method and apparatus, and relates to the technical field of communication. The method comprises the following steps: when a ZC sequence with a lengthof NZC and a sequence number of n is generated, performing double recursive operation on a function f(n) and a function g(n) to obtain f(n-1) and g(n-1); performing modulo operation according to the f(n-1), the g(n-1) and the length NZC to obtain an index value idx; and searching a preset lookup table according to the index value idx to obtain the ZC sequence with the sequence number of n. In thisway, a multiplier or a divider required in the modulo process in the prior art is avoided, and only an adder and a comparator are used in the whole process of generating the ZC sequence, thereby reducing the complexity of implementing the general ZC sequence by hardware, shortening the hardware processing delay, reducing the hardware implementation area, and reducing the hardware implementation power consumption, in addition, the method is not limited to the generation of the ZC sequence when k=0, and is also universal to the generation of ZC sequences in other scenes.

Description

technical field [0001] The present disclosure relates to the field of communication technologies, and in particular, to a method and device for generating a ZC sequence. Background technique [0002] ZC sequence, namely Zadoff-Chu sequence, is a constant envelope sequence in complex form. Due to its good autocorrelation and cross-correlation, it has been widely used in 4G LTE and subsequent wireless communication systems. For the 4GLTE system, the primary synchronization sequence (PSS), the random access sequence (PRACH), the PUCCH carrying the HARQ ACK / NACK response, and the Souding RS (SRS) all use different forms of ZC sequences. For the NB-IOT system, the primary synchronization sequence (NPSS) and the secondary synchronization sequence also use the characteristics of the ZC sequence. a length N ZC The formula of the ZC sequence is as follows, [0003] [0004] Among them, q∈{1,2,...,N in the formula ZC -1} is the root index of the ZC sequence, n in the formula re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/14H04J13/00
CPCH04J13/0062H04J13/14
Inventor 李文佳
Owner BEIJING XIAOMI PINECONE ELECTRONICS CO LTD
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