Efficient MSK direct spread communication detecting method

A detection method and high-efficiency technology, applied in electrical components, transmission systems, etc., can solve the problems of large amount of calculation and difficult implementation of detection processing, meet the requirements of reducing processing capacity, improve low signal-to-noise ratio adaptability, and low adaptability. Effect of SNR and SNR Uncertainty Requirements

Inactive Publication Date: 2014-07-16
XUCHANG UNIV
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Problems solved by technology

[0002] The characteristics of the existing MSK direct spread communication non-cooperative detection processing method are as follows: 1. To a large extent, the baseband signal is analyzed and processed, and there are unavoidable defects in the MSK spread spectrum communication non-cooperative detection in terms of carrier extraction and phase tracking; 2. The detection processing fails to effec

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  • Efficient MSK direct spread communication detecting method

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[0029] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are given in the description and drawings, but the present invention can be implemented in many different forms and is not limited to the embodiments described in the description. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0030] The invention provides an efficient detection and parameter estimation method for serial MSK direct spread communication. The non-cooperative receiver realizes the detection of the target communication and the estimation of important parameters such as the system spread spectrum sequence through the multi-domain processing and analysis of the output signal of the receiver. . Its specific implem...

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Abstract

The invention discloses an efficient MSK direct spread communication detecting method. The method comprises the steps that firstly, a non-cooperative receiver searches for, monitors and samples related frequency bands, an internal high-speed processing chip carries out segmentation self-correlation and square operation on sampling data, the processed sampling data are accumulated to reduce the adverse effect of noise, and the value of a symbol period Ts is estimated by searching for peak values of an accumulation sequence and calculating the interval between adjacent peak values; secondly, delay multiplying, high pass, fast Fourier transform and other processing are carried out on a receiving signal to estimate the time width Tc of an MSK spread spectrum system chip; thirdly, on the basis of the analysis and process, the Tc delay multiplying, low pass, Hilbert transform, Ts window sliding observing and other analyzing processing are carried out on the receiving signal, and a spread spectrum pseudorandom sequence of the spread spectrum system can be estimated. The needed operations are easy to process, detecting speed is high, and the method can meet the requirement for non-cooperative communication detecting.

Description

technical field [0001] The invention relates to an efficient detection method for MSK direct spread communication. Background technique [0002] The characteristics of the existing MSK direct spread communication non-cooperative detection processing method are as follows: 1. To a large extent, the baseband signal is analyzed and processed, and there are unavoidable defects in the MSK spread spectrum communication non-cooperative detection in terms of carrier extraction and phase tracking; 2. The detection processing fails to effectively utilize the gain brought by blind despreading of unknown MSK spread spectrum signals; 3. Using high-order cumulants, cyclic spectrum or matrix decomposition methods to extract signal features requires a large amount of calculation and detection processing It is very difficult to implement; 4. The implementation of using the orthogonal branch detection processing method is affected by many factors. [0003] There are deficiencies in the prior...

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Application Information

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IPC IPC(8): H04B1/7073H04B1/7097
Inventor 董占奇张元敏李明霞王红玲周雅
Owner XUCHANG UNIV
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