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Method, apparatus, system for clipping signal and signal radiation system

A clipping and signal technology, applied in the fields of signal transmission system, signal clipping, and signal processing, can solve the problem of occupying large hardware resources, and achieve the effect of reducing pressure and simple logic design.

Active Publication Date: 2009-05-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing clipping method is mainly: the initial noise extracted from the input signal is processed by a high-order band-pass filter to generate the clipping noise required for superimposition, and then the clipping noise is reversely superimposed on the input signal to complete the clipping process. Existing technologies need to occupy a large amount of hardware resources in the implementation

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  • Method, apparatus, system for clipping signal and signal radiation system
  • Method, apparatus, system for clipping signal and signal radiation system
  • Method, apparatus, system for clipping signal and signal radiation system

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Embodiment 1

[0030] like figure 1 The flowchart of the signal clipping method shown in the present embodiment proposes a signal clipping method, including:

[0031] Step 10 of obtaining the signal to be clipped: sampling the input signal and detecting the maximum peak point signal exceeding the preset threshold, and using the sampling point signal centered on the maximum peak point signal as the signal to be clipped, it can be known that, The peak point signal can be regarded as a noise signal exceeding the preset threshold, here a maximum peak point signal is found according to the preset threshold;

[0032] Step 20 of obtaining a clipping noise signal: multiplying the maximum peak point signal by a preset clipping coefficient to obtain a clipping noise signal;

[0033] Step 30 of clipping processing: reversely superimposing the clipping noise signal on the signal to be clipped to complete clipping processing.

[0034] In the above signal clipping method, the input signal may be a combi...

Embodiment 2

[0037] This embodiment proposes a signal clipping method, including: Step 10 of obtaining the signal to be clipped: sampling the input signal and detecting the maximum peak point signal exceeding the preset threshold, and centering on the maximum peak point signal The sampling point signal is used as the signal to be clipped; the step 20 of obtaining the clipping noise signal: multiplying the maximum peak point signal with the preset clipping coefficient to obtain the clipping noise signal; the step 30 of clipping processing: The clipping noise signal is reversely superimposed on the signal to be clipped to complete the clipping process.

[0038] Specifically, as figure 2 Shown, at first, include in the step 10 that obtains signal to be clipped:

[0039] Sampling step 101: see image 3 The principle diagram of the clipping queue is explained by the signal flow direction. The initial sampling point signal 1 is input into the clipping queue in sequence according to a certain ...

Embodiment 3

[0052] like Figure 4 As shown, this embodiment proposes a signal clipping method, which can perform k-level clipping processing on an input signal. The choice of k series is mainly based on the peak-to-average ratio of the signal. Some signals only need one level to complete the control of the peak-to-average ratio, but the peak-to-average ratio signal must be multi-level to achieve, k>1. After the multi-carrier signal is digitally up-converted / combined, the output signal is further transmitted to the power amplifier through digital pre-distortion after k-level clipping processing.

[0053] Specifically, see image 3 The principle schematic diagram of the clipping queue illustrates k-level clipping processing. After m clipping processing is performed on the sampling point signals corresponding to the 2n sampling point data of the middle two frames n: 2n-1——3n-1, the first frame of the queue is 3n : The sampling point signal 9 corresponding to the n sampling point data of 4n...

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Abstract

The invention discloses a signal clipping method, which comprises the following steps: sampling input signals, detecting out a maximal peak point signal over a preset threshold from the input signals, and making the sampling point signals using the maximal peak point signal as a center be the signals to be clipped; multiplying the maximal peak point signal with a preset clipping coefficient to obtain a clipping noise signal; and reversely stacking the clipping noise signal to the signals to be clipped to finish clipping treatment. The invention also discloses a signal clipping device, a system and a signal emitting system. The signal clipping method, the device, the system and the signal emitting system adopt once clipping treatment to achieve removal of the maximal peak point signal of the input signals, are simple in logical design, can achieve inhibit of peak-to-mean ratio signals under the condition of optimizing hardware resources, and further reduce pressure of a power amplifieron output power and efficiency.

Description

technical field [0001] The present invention relates to signal processing technology in the communication field, in particular to a signal clipping method, device, system and signal transmitting system. Background technique [0002] In the technical field of communication, the composite envelope of a multi-carrier signal will lead to a high PAR (PeakAverage Ratio, peak-to-average ratio) of the signal. When a signal with high PAR passes through the power amplifier of the base station, in order to avoid signal distortion and spectrum regeneration, the power amplifier needs to have a larger linear range, that is, the power amplifier must amplify the signal with high PAR and send the amplified signal. In this way, It will inevitably reduce the output power of the power amplifier of the base station and increase the pressure on the efficiency of the power amplifier. Therefore, in order to reduce the PAR of the signal, thereby increasing the effective output power of the power am...

Claims

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Application Information

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IPC IPC(8): H04B7/005H04W52/04
CPCH03F3/24H04L27/2623
Inventor 刘宇航付卫香吴迪
Owner HUAWEI TECH CO LTD
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