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Wireless communication carrier wave tracking method based on FFT assistant S-PLL

A carrier tracking and wireless communication technology, applied in carrier regulation, modulated carrier system, digital transmission system, etc., can solve problems such as difficulty in application, and achieve the effect of strong practicability, simple structure and low complexity

Inactive Publication Date: 2016-08-17
南京索拉亚科技有限公司
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Problems solved by technology

However, when faced with voice (Kbps), hundreds of Kbps-level video or data communication services, the above method is still difficult to apply

Method used

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  • Wireless communication carrier wave tracking method based on FFT assistant S-PLL
  • Wireless communication carrier wave tracking method based on FFT assistant S-PLL
  • Wireless communication carrier wave tracking method based on FFT assistant S-PLL

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings.

[0061] Such as Figure 1-4 Shown, a kind of wireless communication carrier tracking method based on FFT assisted S-PLL comprises the following steps:

[0062] The first step: sender processing; the information sequence to be sent After coding and modulation, it is converted into an electromagnetic wave signal that can be sent through the antenna, and the signal can be modeled as ; When the signal passes through the AWGN channel, there will be Gaussian white noise interference; in addition, due to the relatively high-speed motion of the transmitting end and the receiving end, there will be Doppler frequency deviation when the transmitted electromagnetic wave signal reaches the receiving end , combined with the existing research work, the modeled as a reference to the actual carrier frequency , Carrier moving speed , acceleration , jerk and time Multip...

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Abstract

The invention relates to a wireless communication carrier tracking method based on FFT-assisted S-PLL. In a high-speed mobile carrier wireless communication system, the carrier tracking method based on a fast Fourier transform-assisted second-order phase-locked loop can solve the problem of large-scale DPP For the wireless communication receiving problem under the condition of Le frequency offset, under the condition that the sampling frequency satisfies the Nyquist sampling theorem, the rough position of the signal frequency is quickly obtained through FFT, and the S-PLL is further used to realize accurate frequency offset estimation. This method makes full use of the frequency offset estimation characteristics of FFT and PLL, can overcome the influence of large-scale Doppler frequency offset and signal noise, and can track large dynamic carrier frequency offset; on the other hand, the method has a simple structure , with lower complexity and stronger practicability.

Description

technical field [0001] The invention relates to a wireless communication carrier tracking method based on FFT-assisted S-PLL, and belongs to the technical field of wireless communication carrier tracking. Background technique [0002] The vigorous development of the mobile Internet industry has higher and higher requirements for wireless communication networks. Network communication with all-weather, high reliability, high speed, high real-time and large user capacity has become the goal that the development of wireless communication technology is constantly pursuing. Throughout the history of wireless communication development, especially the history of wireless communication development in China, the problem of wireless communication for high-speed mobile carriers with a speed of hundreds of kilometers per hour or even exceeding the speed of sound has not been effectively resolved. In the early stage, due to the constraints of national economic level and technological deve...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04L27/26
CPCH04L27/0014H04L27/2659H04L27/266
Inventor 杨昊李辉朱浩程清明姜青竹张京
Owner 南京索拉亚科技有限公司
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