Method and device for reducing PAR by using preserved sub-carrier

A technology for reserving subcarriers and subcarriers, which is applied in multiplexing communication, orthogonal multiplexing system, electrical components, etc.

Inactive Publication Date: 2012-08-29
RUGAO CHANGJIANG SCI & TECHCAL IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012]However, due to the method of using reserved subcarriers to reduce the peak-to-average ratio, it is necessary to reserve a part of subcarriers to reduce the peak-to-average ratio. When there are four sectors, since each sector needs to reserve some subcarriers, and the subcarriers reserved by the sectors cannot be used for data transmission, so when the number of subcarriers is limited, using the reserved subcarriers reduces the peak The average ratio method reduces the efficiency of bandwidth usage

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  • Method and device for reducing PAR by using preserved sub-carrier
  • Method and device for reducing PAR by using preserved sub-carrier
  • Method and device for reducing PAR by using preserved sub-carrier

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Embodiment Construction

[0053] Peak clipping sequence generating step 12, utilizing the position information of reserved subcarriers to generate peak clipping sequence;

[0054] Peak clipping step 13, all sectors of the same multi-sector cell use the above peak clipping sequence to perform peak clipping processing.

[0055] In step 11, it is necessary to select a group of subcarriers used to reduce the peak-to-average ratio from the subcarriers of the multi-sector cell as reserved subcarriers. At this time, the reserved subcarriers can be selected from one of the multi-sector cells Sector selection can also be selected from multiple sectors of a multi-sector cell, since the subcarriers in each sector and between sectors of the same multi-sector cell are orthogonal to each other, and the reserved subcarriers are not used Because of the transmission of data, it will not affect the transmission of data.

[0056] At the same time, the selected reserved subcarriers can be fixed subcarriers, or the reserv...

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Abstract

The invention provides a method and a device for using reserved subcarriers for reducing peak-to-average ratio, which are used by the multi-sector cell in an orthogonal frequency division multiplexing system, wherein, the method comprises: step A, a group of subcarriers are selected from the subcarriers of the multi-sector cell and taken as reserved subcarriers; step B, a peak elimination sequence is generated according to the location information of the selected reserved subcarriers; step C, all the sectors of the multi-sector cell use the peak elimination sequence for eliminating the peak on the data of the sectors to be processed. By using the method and the device, all the sectors of the multi-sector cell use the same reserved subcarriers for eliminating the peak, so that the total number of the subcarriers which are used for eliminating the peak can be reduced and the saved subcarriers can be used for transmitting the data, thereby effectively improving the service efficiency of empty bandwidth.

Description

technical field [0001] The present invention relates to a method for reducing the peak-to-average ratio in an Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) system, in particular to a method and a device for reducing the peak-to-average ratio by using reserved subcarriers. Background technique [0002] Orthogonal frequency division multiplexing is a multi-carrier parallel transmission technology. It converts high-speed data streams into a set of low-speed parallel data streams through serial-to-parallel conversion, which greatly reduces the sensitivity of the system to frequency selectivity of multipath fading channels. At the same time, it improves the ability to resist multipath delay expansion of wireless channels, so that high-speed data streams can be transmitted on frequency bands with multipath fading. [0003] Due to the orthogonality between sub-carriers, compared with the traditional frequency division multiplexing sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04J11/00
Inventor 赵霞汤琥景卓
Owner RUGAO CHANGJIANG SCI & TECHCAL IND CO LTD
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