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Method and apparatus for reducing peak-to-average ratio

A peak-to-average ratio and precoding technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve the problem of reducing the peak-to-average ratio, high peak-to-average ratio of multi-carrier TD-SCDMA, less multiplication and less storage space, etc. problem, to achieve the effect of meeting the modification requirements, avoiding related calculations, and saving space

Active Publication Date: 2012-11-14
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0009] In view of this, the problem solved by the present invention is to propose a method and device for reducing the peak-to-average ratio, which solves the problem of excessively high peak-to-average ratio of multi-carrier TD-SCDMA, and can meet the changes of the existing system at the same time, and the increased multiplication Less computation and less storage space

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  • Method and apparatus for reducing peak-to-average ratio
  • Method and apparatus for reducing peak-to-average ratio

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Embodiment Construction

[0038] The basic idea of ​​the present invention is to use complementary sequence to carry out phase precoding to reduce the power of MIDAMBLE code in TD-SCDMA, and then reduce the PAR of the system.

[0039] For this reason, the present invention provides a kind of method that reduces peak-to-average ratio, such as figure 1 As shown, the method includes:

[0040] Step 101: Perform phase precoding using complementary sequence characteristics;

[0041] Step 102: After the user data is spread and the training sequence code is inserted, perform phase rotation on the user data by using the precoded phase factor.

[0042] In order to enable those skilled in the art to better understand the present invention, the method of the present invention will be described in detail below in conjunction with the drawings and specific embodiments. Specifically, in Embodiment 1, in the embodiment of the present invention, a complementary sequence (CP, Complementary sequences) is used to perfor...

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Abstract

The invention provides a method for reducing peak-to-mean ratio, which comprises the following steps: using characteristics of a complementary sequence to carry out phase pre-coding; and after user data finish spread spectrum and interposition of training sequence codes, adopting pre-coded phase factors to carry out phase rotation for the user data. The invention also provides a device for reducing the peak-to-mean ratio. By utilizing the complementary sequence to carry out phase pre-coding, the method and the device solve the problem of over-high peak-to-mean ratio of a multicarrier TD-SCDMAsystem, can meet change requirement of the prior system at the same time, save space for storing the phase factors by a base band greatly, and avoid unnecessary correlative calculation at the same time.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and device for reducing peak-to-average ratio. Background technique [0002] For the TD-SCDMA system, reducing the peak-to-average ratio in the mobile communication system and using multi-carrier technology can enable the base station equipment to support more users or provide greater coverage and improve system capacity, thereby reducing the number of base stations and station Substantial reduction in address, so that the system operator to reduce investment. [0003] According to the existing TD-SCDMA multi-carrier scheme, there is an agreement for multiple carriers supported by the same cell: the main carrier and the auxiliary carrier use the same scrambling code and basic MIDAMBLE (training sequence) Set of transmitters. The positions of the basic MIDAMBLE codes of each carrier are completely aligned, and the basic MIDAMBLE codes of each carrier are th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/00
Inventor 熊军徐铁铸段滔路成业吴珩
Owner DATANG MOBILE COMM EQUIP CO LTD
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