Method for MPPM constellation selection based on average symbol error rates in X-ray communication

A symbol error rate and averaging technology, applied in the field of communication, can solve problems such as complex algorithms, large amount of calculation, and unsuitability for engineering applications

Inactive Publication Date: 2014-09-24
XIDIAN UNIV
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Problems solved by technology

However, the above two methods have complicated algorithms and large amount of calculation, so they are not suitable for engineering applications.

Method used

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  • Method for MPPM constellation selection based on average symbol error rates in X-ray communication
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  • Method for MPPM constellation selection based on average symbol error rates in X-ray communication

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides detailed implementation steps, but is not limited to this embodiment.

[0049] refer to figure 1 Shown, a kind of MPPM constellation selection method based on average symbol error rate in X-ray communication, it is characterized in that, described method comprises the steps:

[0050] Step 1, constructing an average symbol error rate model based on constellation selection, the specific steps are as follows;

[0051] Step 1.1, for (n, w) MPPM, there are n time slots, wherein w said time slots contain information, and these w said time slots are called signal time slots; combination, a total of Different MPPM symbols; And the set of these different MPPM symbols constitutes the MPPM constellation, which can be expressed as X(x 1 ,x 2 ,...,x M ), where x i is an MPPM symbol from the...

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Abstract

The invention discloses a method for MPPM constellation selection based on average symbol error rates in X-ray communication. The method includes the following steps of establishing an average symbol error rate model based on constellation selection, calculating the average symbol error rates under different MPPM constellation combination conditions for different MPPM constellations according to the obtained average symbol error rate model based on constellation selection, converting the constellation selection problem into the conditional constraint optimization problem, and obtaining the constellation selection scheme based on the minimum average symbol error rate condition by selecting the search strategy according to the average symbol error rate model based on constellation selection and according to the conditional constraint optimization problem. By means of the method, on one hand, the constellation selection problem is converted into the optimization problem and simplified, calculation amount is small and speed is high when search is conducted through the search strategy, and the method is suitable for engineering realization; on the other hand, constellation selection is conducted with the average symbol error rates as the standard, channel transmission accuracy is easily improved, and channel transmission errors are reduced.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an MPPM constellation selection method based on an average symbol error rate in X-ray communication. Background technique [0002] X-ray Pulsar-based Navigation (XPNAV) is a new navigation technology that uses X-ray signals emitted periodically by pulsars to provide navigation services. It can provide navigation services for low-Earth orbit missions and deep space missions, which will be an important navigation method for future deep space exploration. With more and more exploration activities and data transmission requirements, the advancement of communication technology is more urgent. In recent years, free-space optical communication has shown its advantages over traditional communication methods. X-ray communication (X-raycommunications, XCOM), as a new way of optical communication, shows great potential in the field of deep space communication. The most commonly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 宋诗斌许录平张华申洋赫马炎李冀俊谢春晖
Owner XIDIAN UNIV
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