Method and device for reducing signal peak-to-average ratio

A signal peak-to-average ratio and digital signal technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problem of reducing carrier signal peak-to-average ratio, error vector magnitude adjacent channel power leakage rate exceeding the standard, and poor peak clipping effect, etc. problem, to avoid signal distortion, optimize the effect of peak clipping, and save money

A signal peak-to-average ratio and digital signal technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problem of reducing carrier signal peak-to-average ratio, error vector magnitude adjacent channel power leakage rate exceeding the standard, and poor peak clipping effect, etc. problem, to avoid signal distortion, optimize the effect of peak clipping, and save money

CN101645862AInactive Publication Date: 2010-02-10ZTE CORP
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  • Method and device for reducing signal peak-to-average ratio
  • Method and device for reducing signal peak-to-average ratio
  • Method and device for reducing signal peak-to-average ratio

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Embodiment Construction

[0052] The basic idea of ​​the present invention is to configure different peak-shaving schemes for different frequency points based on the principle of peak cancellation. Hereinafter, the present invention will be further described in detail by taking reducing the peak-to-average ratio of multi-carrier signals as a specific embodiment and referring to the accompanying drawings.

[0053] The signal transmitting device for reducing the signal peak-to-average ratio involved in the present invention is the same as the prior art, and will not be repeated here, only the processing method of the CFR module will be described. figure 2 It is a flow chart of the method for reducing the signal peak-to-average ratio of the present invention, such as figure 2 As shown, the present invention reduces the method for signal peak-to-average ratio and comprises the following steps:

[0054] Step 21: According to the multi-carrier superimposed intermediate frequency digital signal sent by the...

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Abstract

The invention discloses a method for reducing the signal peak-to-average ratio, which comprises the following steps: calculating synthesis peak clipping pulse shaping filter coefficients according to intermediate frequency digital signals; acquiring cancellation pulses; and after delaying the intermediate frequency digital signals, performing operation with the cancellation pulses and outputting signals with low peak-to-average ratio. The invention also discloses a device for reducing the signal peak-to-average ratio, which comprises a synthesis peaking pulse shaping filter, a tapping value calculating element, a first frequency spectrum moving unit, a digital filtering unit, a second frequency spectrum moving unit, a half-band filter, a delay unit and a cancellation unit. The method and the device can be adaptable to multi-carrier signals of each carrier frequency point flexibly configured in the available frequency band range, optimize the peak clipping effect, avoid signal distortion and save expenses.

Description

technical field [0001] The invention relates to a signal processing technology of a wireless communication system, in particular to a method and a device for reducing the signal peak-to-average ratio. Background technique [0002] In order to increase the data transmission rate, the 3G wireless communication system generally uses high-order modulation methods such as quadrature phase shift keying (QPSK) and quadrature amplitude modulation (QAM) for signal modulation. However, due to the non-constant envelope characteristics of high-order modulation methods such as QPSK and QAM, signals modulated by high-order modulation methods such as QPSK and QAM generally have a high peak-to-average ratio (PAR). Also, when transmitting a composite signal of multiple carriers, the peak-to-average ratio will be higher. After the signal with peak-to-average ratio is converted by digital-to-analog (DA) and sent to the power amplifier, it is easy to cause the power amplifier to work in the no...

Claims

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Application Information

Patent Timeline
10 Feb 2010
Publication
CN101645862A
IPC
H04L27/26
CPC
H04L27/2634; H04L27/26412
Inventors
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