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Peak average power rate control method, receiving end and transmitting end

A technology of peak-to-average power ratio and control method, which is applied in the field of data transmission and can solve problems such as large amount of calculation

Inactive Publication Date: 2007-03-14
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0043] The present invention provides a peak-to-average power ratio control method, a receiving end and a transmitting end in a MIMO-OFDM system, which are used to solve the problem that the calculation amount is relatively large when the existing linear PAPR reduction method is applied to the MIMO-OFDM system;

Method used

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  • Peak average power rate control method, receiving end and transmitting end
  • Peak average power rate control method, receiving end and transmitting end
  • Peak average power rate control method, receiving end and transmitting end

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Embodiment Construction

[0129] After the present invention further studies the MIMO-OFDM system using OSTBC technology, among the two data streams output by the same orthogonal space-time block code encoder, the data stream transmitted on antenna 1 and the data stream on antenna 2 have the same peak-average Statistical characteristics of the power ratio PAPR, that is, the odd symbol data on antenna 1 and the even symbol data on antenna 2 are conjugate, and the even symbol data on antenna 1 and the odd symbol data on antenna 2 are negatively conjugated. Further research found that the weight vector searched for the even symbol data on antenna 1 is the conjugate vector of the odd symbol data weight vector on antenna 2, and the weight vector searched based on the odd symbol data on antenna 1 is Conjugate vector of even symbol data weight vector.

[0130] The proof process of the above conclusion is as follows:

[0131] Conclusion 1. The data stream on antenna 1 and the data stream on antenna 2 have the...

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Abstract

This invention relates to data transmission technique to one peak even power control method of one MIMO-OFDM system, receive end and emission end, which solves current linear PAPR applied in the system and computes large problem to improve MIMO-OFDM system data low effect problem. The invention adopts OSTBC technique for coding two paths of data flow even and odd characters relationship on weight vector.

Description

technical field [0001] The invention relates to data transmission technology, in particular to a peak-to-average power ratio control method, a receiving end and a transmitting end in a MIMO-OFDM system. Background technique [0002] MIMO-OFDM (MultiInput Multi Output-Orthogonal Frequency Division Multiplexing, multi-input multi-output orthogonal frequency division multiplexing) system has high spectrum efficiency, data transmission rate and large channel capacity, and is bound to become the core of the new generation of mobile communication technical solutions. [0003] However, the MIMO-OFDM system has the same defect as the OFDM system, that is, there is a very high PAPR (Peak-to-Average Power Ratio, peak-to-average power ratio). The relatively high PAPR means that when the signal passes through nonlinear devices such as power amplifiers, the power amplifier is required to have a large dynamic range, otherwise nonlinear distortion will occur, and the harmonics generated b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 张朝阳洪善艳王吉滨楼群芳
Owner ZHEJIANG UNIV
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