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Peak-to-average power ratio optimizing process and apparatus

An optimization method and an optimization device technology, applied in the field of network communication, can solve the problem that the optimization of peak-to-average ratio and power amplifier power is far from the best state, the effective peak-to-average ratio suppression of signals cannot be achieved, and the high-quality requirements of high-order modulation signal waveforms, etc. problems, to achieve wide system applicability, facilitate system network planning and optimization, and improve the maximum transmission power and efficiency

Active Publication Date: 2006-11-22
HUAWEI TECH CO LTD
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Problems solved by technology

[0008] If the existing technology is used for the above-mentioned multiple signals transmitted in the OFDM system, the method of performing the same processing on all signals without distinguishing the signal type cannot achieve effective peak-to-average ratio suppression for all signals
For example, when high-order modulation, high-rate coded signals, and low-order modulation signals are transmitted simultaneously, due to the high requirements for waveform quality of high-order modulation signals, the margin left for pre-distortion and clipping processing is small. If the existing technology used The peak-to-average ratio of high-order modulation and high-order rate coding signals can be reduced, but for low-order modulation signals, the optimization of peak-to-average ratio and power amplifier power is far from optimal

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  • Peak-to-average power ratio optimizing process and apparatus
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  • Peak-to-average power ratio optimizing process and apparatus

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Embodiment Construction

[0060] The core of the present invention is to carry out modulation and coding mode identification to the signals in each section of signal segments transmitted with different modulation and coding modes, and after the inverse fast Fourier transform (IFFT), according to the different modulations of signals in each signal section And coding mode, query the corresponding clipping threshold list, generate peak cancellation pulse and superimpose the transmission signal, fully optimize the peak-to-average ratio under the coexistence of multiple modulation and coding types, and make the transmitter power under various modulation and coding data conditions Under the maximum transmit power and efficiency as high as possible.

[0061] Specifically, the present invention adds a peak-to-average ratio suppression module before performing digital-to-analog conversion (DAC) after the baseband inverse fast Fourier transform (IFFT) of the OFDM transmitter is processed, for different modulation...

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Abstract

The invention relates to a method for optimizing peak-valley ratio and relative device. Wherein, said method comprises: recognizing the type of transmitted signal, to generate relative peak counteract impulse; layering said peak counteract impulse and the transmitted signal to be output. The invention can improve the maximum sending power and efficiency of sending device and improve the low-level modulation, etc. The invention improves the cover range in low-level modulation method. And it can be used in time division communication system.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and device for optimizing peak-to-average ratio. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is an important technology used in communication systems. Its main idea is to divide the assigned channel into many orthogonal sub-channels, and perform narrowband modulation and transmission on each sub-channel, so that The signal bandwidth is less than the associated bandwidth of the channel. Orthogonal frequency division multiplexing has very obvious advantages, such as effectively overcoming intersymbol interference (ISI), and is suitable for high-speed data transmission in multipath environments and fading channels; through the joint coding of each subcarrier, it has strong anti- Attenuation capability; OFDM implementation method based on IFFT / FFT can be selected; the channel utilization rate is very high, which is especiall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 武杰
Owner HUAWEI TECH CO LTD
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