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Optimal sampling point acquisition method for burst system timing synchronization algorithm

An acquisition method and synchronization algorithm technology, applied in the field of communication, can solve the problems of not considering noise and low synchronization accuracy, and achieve the effect of strong anti-noise performance, high synchronization accuracy and good stability

Active Publication Date: 2022-07-29
北京中科晶上科技股份有限公司
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Problems solved by technology

However, since the algorithm only uses a single channel of data for estimation and does not consider the impact of noise, it is susceptible to noise interference in a low signal-to-noise ratio environment, resulting in low synchronization accuracy

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  • Optimal sampling point acquisition method for burst system timing synchronization algorithm
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  • Optimal sampling point acquisition method for burst system timing synchronization algorithm

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Embodiment Construction

[0031] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0032] Based on the symmetrical characteristics of the left and right half-symbol power values ​​at the optimal sampling time of the matched filter, the present invention performs difference processing on the left and right half-symbol power values, and the minimum value of the difference corresponds to the optimal sampling time. The specific implementation is as follows: figure 1 shown:

[0033] Step 1. After the signal passes through the matched filter, let the sampling data R of the n-th sampling point of the x-th symbol x (n) The expression is as follows:

[0034]

[0035] where j is the imaginary unit, W(n) and Represent the amplitude and phase angle of white Gaussian noise, respectively. The amplitude and phase angle of the noise are independent of each other, and both are Gaussian random processes with zero mean. A x (n) and represent t...

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Abstract

The invention discloses an optimal sampling point acquisition method for a burst system timing synchronization algorithm, and belongs to the field of communication. The invention is based on the symmetrical characteristic of the power of the left and right half symbols of the matched filter, and uses the idea that the multi-channel data accumulation can smooth the noise. First, with the symbol length as the range, the power values ​​of the corresponding sampling points in each symbol are accumulated to obtain n-channel sampling power values, and then Taking the nth sampling point as the center, obtain the left and right half symbol power difference Δ n , and according to the symmetrical characteristic of the power of the left and right half-symbols, the position of the final optimal sampling point is the sampling point corresponding to the smallest difference between the powers of the left and right half-symbols. While inheriting the advantages of the maximum average power algorithm with low computational complexity and easy implementation, the present invention has stronger anti-noise performance due to the influence of multi-channel data accumulation and smooth noise, and has better stability regardless of high or low signal-to-noise ratio conditions. Synchronization accuracy is higher.

Description

technical field [0001] The invention relates to an optimal sampling point acquisition method for a burst system timing synchronization algorithm, and belongs to the field of communication. Background technique [0002] At present, the short burst communication system has been widely used in military communication, satellite communication, deep space exploration and high-speed mobile communication and other fields. In the burst communication system, in order to obtain the transmitted information data, it is first necessary to sample the signal at the symbol rate at the output end of the matched filter in the demodulator. Sampling is extremely important. When there is a timing deviation in the signal and the sampling point of the signal deviates from the optimal sampling position, the signal-to-noise ratio of the received signal will decrease, and at the same time, inter-symbol interference will affect the decision of the signal, and eventually the bit error rate will increase...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03
CPCH04L25/03006H04L2025/03598
Inventor 陆松建李质彬司伟立石晶林韩娟胡金龙
Owner 北京中科晶上科技股份有限公司
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