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Method for eliminating peak power

A technology of peak power and detection power, applied in the field of communication, can solve the problem of destroying the data phase, and achieve the effect of reducing processing capacity, reducing distortion, and setting reasonable settings

Active Publication Date: 2008-03-26
DATANG MOBILE COMM EQUIP CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] An object of the present invention is to provide a method for cutting peak power in a TDD multi-frequency point communication system and a communication terminal for realizing peak power cutting, so as to solve the problem of destroying the data phase due to the fixed peak cutting sequence in the prior art

Method used

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] Please refer to FIG. 1 , which is a flow chart of the method for cutting peak power of the present invention. it includes:

[0038] S110: Perform interpolation filtering on each signal after modulation and spread spectrum, and convert frequency into signals of different frequency points.

[0039] Before the signal is interpolated and filtered, a training sequence code can be inserted into each time slot of each channel of data after modulation and spread spectrum, and the training sequence codes of different frequency points are related to phase deflection.

[0040] According to the existing TDD multi-frequency point scheme, there is an agreement for multiple frequency points supported by the same cell: the primary frequency point and secondary frequency point use the same scrambling code and basic midamble (training sequence) code, so the basic midamble (tra...

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Abstract

This invention relates to a method for eliminating power of peak values including: 1, carrying out interpolation filter to each channle signals after modulation and spread to change them to signals of different frequency points, 2, making linear overlapping all the frequency point signals on the time domain, 3, carrying out cancel of peaks to signals needing clipping according to the clipping sequence regulated according to the change of amplitude, which can adaptively regulate peak-clipping sequencies of 1 path and Q to adaptively eliminating power of peak values and the loss of phase information of original signals is the least.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for cutting peak power in a TDD (time division duplex) multi-frequency point communication system and a communication terminal for realizing peak power cutting. Background technique [0002] In the cell of a TDD communication system (such as TD-SCDMA time division synchronous code division multiple access communication system and OFDM_TDD orthogonal frequency division multiplexing time division duplex communication system), since the multi-frequency point signals that need to be transmitted will be combined at the digital intermediate frequency, In order to share a set of transmitters in the subsequent radio frequency channel for transmission, there will be a strong signal peak-to-average ratio PAPR (peak to average power raio, peak power to average power ratio) at the antenna transmitting end due to peak-to-peak superposition ratio). If the peak power is too large, it is easy...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04B7/005
CPCY02D30/70
Inventor 熊军段滔刘先锋
Owner DATANG MOBILE COMM EQUIP CO LTD
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