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A method and system for reducing signal peak-to-average ratio

A signal peak-to-average ratio and peak-to-average ratio technology, applied in multi-frequency code systems and other directions, can solve problems such as signal loss

Inactive Publication Date: 2018-05-15
POTEVIO INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the peak clipping processing will inevitably bring losses to the signal and reduce the error vector magnitude (EVM) of the signal, the peak clipping processing needs to balance the peak-to-average ratio of the signal and the signal quality. This balance is closely related to the statistical characteristics of the signal. One-way operations limit the means of operation that seeks this balance

Method used

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  • A method and system for reducing signal peak-to-average ratio
  • A method and system for reducing signal peak-to-average ratio
  • A method and system for reducing signal peak-to-average ratio

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Embodiment 1

[0059] The present invention will be described below by taking parallel two-way peak clipping processing and the processing method as pulse cancellation method as an example, but the protection scope of the present invention is not limited. The signal processing flow is as follows Figure 4 shown. The positive peak detector retrieves peak signals that exceed the positive peak threshold, and the negative peak detector retrieves peak signals that exceed the negative peak threshold. The cancellation resource allocator allocates idle cancellation pulse generators for peak signals. The cancellation pulse generator generates corresponding positive peak cancellation pulses and negative peak cancellation pulses. The scaling factor generator generates different scaling factors according to the magnitude of the peak exceeding the threshold, and multiplies it with the cancellation pulse to match the amplitude phase of the cancellation pulse with the peak point. Finally, the positive p...

Embodiment 2

[0067] In the following, the present invention will be described by taking serial bi-directional peak clipping processing and the processing method as the pulse cancellation method as an example, but the protection scope of the present invention is not limited.

[0068] refer to Image 6 , the specific implementation steps are as follows (take positive peak correction first as an example):

[0069] Step1. Set the positive peak threshold and negative peak threshold respectively.

[0070] Step2. Search for the positive peak of the signal.

[0071] Step3. Generate a positive peak correction signal.

[0072] Step 4. Apply the positive peak correction signal to the delay-matched signal, and perform positive peak correction processing on the signal, that is, perform peak clipping processing on the positive peak signal, that is, reduce the power of the positive peak signal.

[0073] Step5. Search for negative peak signals that exceed the set threshold.

[0074] Step6. Apply the n...

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Abstract

The invention discloses a method and system for reducing the peak-to-average ratio of signals, and relates to the technical field of wireless communication. The method includes the following steps: S1: receiving a signal to be adjusted, and searching for positive peaks and negative peaks of the signal to be adjusted; S2: Generate a positive peak correction signal corresponding to the positive peak, generate a negative peak correction signal corresponding to the negative peak, and apply the positive peak correction signal and the negative peak correction signal to the delay-matched signal to be adjusted , to implement positive peak correction processing and negative peak correction processing, thereby reducing the peak-to-average ratio of the signal to be adjusted. The present invention uses a two-way processing method to reduce the signal peak-to-average ratio, that is, on the one hand, the signal peak-to-average ratio is reduced by reducing the signal peak power, and on the other hand, the signal peak-to-average ratio is reduced by increasing the signal average power. When the signal peak-to-average ratio is selected, the relationship between the signal peak-to-average ratio and the signal quality loss can be better balanced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and system for reducing the peak-to-average ratio of signals. Background technique [0002] Clipping is a technique that reduces the peak-to-average ratio of a signal. Multi-user and multi-carrier signals generally have a relatively large peak-to-average ratio. Since the power amplifier of the transmitter is only linear within a certain dynamic range, the signal will be distorted due to an excessively large peak-to-average ratio. One way to reduce this distortion is to back off the power of the power amplifier, which will seriously reduce the working efficiency of the amplifier; the other is to use the method of reducing the peak-to-average ratio of the signal to make the signal work in the linear region of the amplifier. [0003] The peak clipping method can be implemented in the baseband, such as carrier reservation (TR), the advantage is that there is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 牛吉韬
Owner POTEVIO INFORMATION TECH CO LTD
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