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A Waveform Intelligent Adaptation Method Based on Single Frequency Detection

A waveform and adaptation technology, applied in the direction of multi-frequency code system, modulated carrier system, baseband system components, etc., can solve the problems of complex channel detection design of pilot signal, reduce signal transmission efficiency, etc., and achieve simplified channel estimation design , Improve the effect of signal transmission performance

Active Publication Date: 2022-05-06
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the channel parameters can be detected by adding pilot signals, this method will reduce the signal transmission efficiency, and the use of pilot signals to design complex channel detection

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  • A Waveform Intelligent Adaptation Method Based on Single Frequency Detection
  • A Waveform Intelligent Adaptation Method Based on Single Frequency Detection
  • A Waveform Intelligent Adaptation Method Based on Single Frequency Detection

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Embodiment Construction

[0022] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] An intelligent waveform adaptation method based on single-frequency detection. This method combines the single-frequency signal with the mixed carrier signal. By detecting the single-frequency signal at the receiving end, the estimated value of the channel parameter is obtained, and then the transformation order is selected. It lays the foundation and simplifies the complexity of channel detection without reducing the efficiency of signal transmission.

[0024] The mathematical tool utilized in this method is the discrete form of the four-term weighted fractional Fourier transform (4-WFRFT), which is specifically defined as follows:

[0025] For a digital signal S, its four-item weighted fractional Fourier transform can be expressed as:

[0026] f α (S)=W α S T

[0027] Among them, F α (S) represents the weighte...

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Abstract

The invention discloses a waveform intelligent adaptation method based on single-frequency detection, which belongs to the technical field of wireless communication transmission. This method performs -α-order weighted fractional Fourier transform on the original signal at the sending end, and generates a single-frequency signal, which is loaded onto the -α-weighted fractional Fourier transform signal to obtain single-frequency and weighted fractional Fourier The combined signal of the leaf transform signal; the receiving end receives the analog signal, and obtains the frequency domain signal, performs (α-1) order weighted fractional Fourier transform and frequency domain channel equalization on the frequency domain signal, and obtains the time domain signal estimation value; In addition, the receiving end obtains the optimized value of α according to the wireless channel parameters, and feeds it back to the sending end. The invention can improve the transmission performance of signals under complex wireless channels, and simplify the design of channel estimation without reducing the efficiency of signal transmission.

Description

technical field [0001] The invention relates to the technical field of wireless communication transmission, in particular to an intelligent waveform adaptation method based on single frequency detection. Background technique [0002] With the rapid development of modern wireless communication technology, especially the rapid development of modern 4G / 5G technology, the requirements for information transmission quality are getting higher and higher. However, in a complex transmission environment, especially in channel fading environments such as time domain, frequency domain or time-frequency domain fading, it is necessary to use different communication waveforms to adapt to different channel fading scenarios. This requires that the waveform can be intelligently adapted as the channel changes. [0003] Based on the mixed carrier system of four-term weighted fractional Fourier transform, different communication waveform systems can be obtained by adjusting the transformation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
CPCH04L25/0202H04L27/2628H04L27/265
Inventor 李勇宋志群王斌孙柏昶李荣海沈斌松
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP