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Method and equipment for generating preamble sequence

A sequence and leading technology, applied in the field of wireless communication, can solve the problems of large amount of calculation and difficult to achieve, and achieve the effect of improving the operation speed.

Active Publication Date: 2012-05-30
合肥东芯通信股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In view of this, the present invention provides a method and device for generating a leading preamble sequence, so as to solve the problems of large amount of calculation and difficult implementation in the prior art

Method used

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  • Method and equipment for generating preamble sequence
  • Method and equipment for generating preamble sequence
  • Method and equipment for generating preamble sequence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The flow of the method for generating the preamble sequence disclosed in this embodiment is as follows Figure 8 shown, including:

[0075] Step S81, converting the time domain ZC sequence into a frequency domain ZC sequence;

[0076] In this step, according to Formula 1, the time-domain ZC sequence is obtained when other parameters are given. The conversion process of the ZC sequence in the frequency domain in this embodiment is the same as that in the prior art. Firstly, the ZC sequence in the time domain is cyclically shifted, and then it is transformed by DFT.

[0077] Step S82, determining the format of the target preamble sequence and the number of sampling points in the time domain;

[0078] Depend on figure 1 It can be seen that the lengths of different ZC sequences correspond to preamble sequences of different formats, and for preamble sequences of different formats, when the system bandwidth is different, the number of sampling points in the time domain is ...

Embodiment 2

[0098] It can be seen from the above embodiments that the specific generation process is different according to different preamble sequence formats and time domain sample point parameters, and this embodiment will further illustrate the above differences. Its process is as follows Figure 9 shown, including:

[0099] Step S91, generating a frequency-domain ZC sequence;

[0100] Step S92, determining the format of the target preamble sequence and the number of sampling points in the time domain;

[0101] According to the pre-selection requirements, determine the format of the preamble sequence to be generated and the number of sampling points in the time domain.

[0102] Step S93, judging the number of time-domain sampling points of the target preamble sequence, when it is 1024, execute step S941, when it is greater than or equal to 2048, execute step S942;

[0103] Step S941, performing an inverse discrete Fourier transform with 1024 sampling points on the ZC sequence to ob...

Embodiment 3

[0125] The generation of the preamble sequence in the present invention needs to rely on the ZC sequence in the frequency domain. In addition to using the method in the prior art to generate the ZC sequence in the frequency domain, this embodiment discloses a new method for generating a ZC sequence in the frequency domain. The process is as follows Figure 10 shown, including:

[0126] Step S101, generating a time-domain ZC sequence according to the formula;

[0127] Step S102, calculating the time domain ZC sequence sum;

[0128] Calculate the sequence sum using Equation 5,

[0129] Z sum = Σ n = 0 N ZC - 1 x u ( n ) - - - ( ...

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Abstract

The invention discloses a method and equipment for generating a preamble sequence. The method comprises the following steps of: generating a frequency domain ZC sequence; determining a format and a time domain sampling point number of a target preamble sequence; performing inverse discrete Fourier transform of a corresponding preset small point number on the frequency domain ZC sequence accordingto the time domain sampling point number of the target preamble sequence to obtain a time domain sequence; performing interpolation on the time domain sequence, and converting the length of the time domain sequence into a length corresponding to the time domain sampling point number of the target preamble sequence; acquiring a phase rotation angle according to an initial position of the preset frequency domain resource; multiplying the time domain sequence with the converted length and the phase rotation angle, and performing phase conversion; performing corresponding subsequent processing onthe time domain sequence with the converted phase according to the format of the target preamble sequence; and adding a cyclic prefix to the subsequent processed time domain sequence. The preamble sequence generating method disclosed by the embodiment of the invention avoids the occurrence of Fourier transform of a large point number so as to improve the operation speed, reduce the calculation quantity, improve the generating speed and reduce the power consumption and the circuit area at the same time.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for generating a preamble sequence. Background technique [0002] The LTE (Long Term Evolution, Long Term Evolution) system is widely regarded as a quasi-4G wireless communication system, which has a transmission rate of 100M downlink and 50M uplink, and supports higher mobile speed (350km / h) and larger cell coverage radius (100 kilometers), supporting 200 users per community online at the same time. In addition, LTE also has flexible bandwidth configuration (1.4M ~ 20M), supports multimedia broadcasting services and end-to-end QoS (Quality of Service, quality of service) and other characteristics. Therefore, LTE is also considered to be the development direction of future mobility and the candidate standard of 4G technology. [0003] Before normal user data communication, UE (User Experience, user experience) must first perform a random access ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04W74/08
CPCY02B60/50Y02D30/70
Inventor 张国松吴齐发唐相国
Owner 合肥东芯通信股份有限公司
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