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A peak cutting method and device

A mode signal and bandwidth technology, applied in the field of communication, can solve problems such as high power amplifier pressure, low power amplifier efficiency, and large signal peak-to-average ratio

Active Publication Date: 2020-09-25
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The signal peak-to-average ratio in this multi-mode device will be very large. If peak clipping is not performed, the pressure on the power amplifier will be very high, it will be difficult to output the required power, and the efficiency of the power amplifier will be very low.

Method used

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  • A peak cutting method and device

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Embodiment Construction

[0028] Embodiments of the present application provide a peak-shaving method and device, which are used to reduce the signal peak-to-average ratio in a multi-mode device, thereby improving power amplifier efficiency.

[0029] A method of peak clipping provided by the embodiment of the present application, such as figure 1 shown, including:

[0030] S101. Perform shaping filtering on the first mode signal and the second mode signal respectively; wherein, the bandwidth of the first mode signal is smaller than the bandwidth of the second mode signal, and the baseband signal of the first mode signal is clipped before performing shaping filtering ;

[0031] Wherein, the bandwidth of the signal in the first mode is smaller than the bandwidth of the signal in the second mode, for example, the signal bandwidths of the signals in the two modes differ by more than 10 times.

[0032] S102. Perform interpolation filtering, frequency shifting and combining on the shaped and filtered first...

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Abstract

The invention discloses a peak clipping method and device, which are used for reducing a signal peak-to-average ratio in multimode equipment in order to improve the power amplifier efficiency. The peak clipping method provided by the invention comprises the following steps of respectively shaping and filtering a first mode signal and a second mode signal, wherein the bandwidth of the first mode signal is smaller than the bandwidth of the second mode signal; carrying out peak clipping on a baseband signal of the first mode signal and shaping and filtering; and carrying out interpolation filtering and frequency shifting and combining on the first mode signal and the second mode signal after shaping and molding, and carrying out intermediate frequency peak clipping.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a peak clipping method and device. Background technique [0002] With the development of mobile communication, in order to meet the needs of different users and different scenarios, there are situations in which multiple modes of the mobile communication system work at the same time. In the process of developing from 4G mobile communication system to 5G mobile communication system, the Internet of Things is an important mobile network application scenario. In order to implement the Internet of Things, a narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT) mode is added in 3GPP standard release (R) 13. NB-IoT downlink also adopts Orthogonal Frequency Division Multiplex (OFDM) multi-carrier adjustment method like Long Term Evolution (LTE). One NB-IoT carrier only needs one physical resource block (Physical Resource Block, PRB) , 12 subcarr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2623
Inventor 孙华荣
Owner DATANG MOBILE COMM EQUIP CO LTD