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Integral coding/decoding method based on MIMO radar communication

A coding method and radar technology, applied in the field of radar communication, can solve the problems of difficult simultaneous coverage of narrow beams, time and energy efficiency limitations of integrated systems, etc.

Inactive Publication Date: 2013-11-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of its own working method, it is difficult for the narrow beam of traditional phased array radar to simultaneously cover long-range communication objects such as detection and tracking targets, missiles, and own aircraft. Communication and detection tasks must be carried out in time, and the integrated system time and energy The efficiency of the use is greatly limited

Method used

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  • Integral coding/decoding method based on MIMO radar communication
  • Integral coding/decoding method based on MIMO radar communication
  • Integral coding/decoding method based on MIMO radar communication

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Embodiment

[0149] 1. Coding

[0150] Set M=5, L=6, p=2, reserve the fifth channel as the time-frequency reference channel; and assume the chip width Tc=10 of the subcode string -6 s, subcode string length N=128, carrier frequency ω / 2π=10 9 Hz.

[0151] In the first step, use the genetic algorithm to obtain 59 subcode strings with a length of 128 and number them.

[0152] In the second step, use MATLAB to randomly generate the communication information of the first part and the communication information of the second part respectively:

[0153] Part 1: 2, 1, 2, 2, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 2, 1, 2, 2, 2, 2, 2, 2.

[0154] Part 2: -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, -1, -1, 1, -1, -1, 1, 1, -1, - 1, 1, -1, -1, -1, -1.

[0155] In the third step, the two parts of communication information are allocated to the information bits of the four transmission channels, and the allocation results are shown in Table 3:

[0156] Table 3. Communication information that needs to be modulat...

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Abstract

The invention provides an integral coding / decoding method based on MIMO radar communication. The orthogonal spread spectrum code sequence guarantees the orthogonality of bipolar phase spread spectrum code sequence based on WalsH matrix. The requirement of the radar to the detection of signal self-correlation peak value, mutual correlation peak value low side-lobe can be satisfied through the genetic algorithm. The signal encoding is based on soft spread spectrum biorthogonal encoding. To satisfy the requirement of the MIMO radar to detection signal, different spreading coding sequences can be used on different encode element positions; special sending channel can be reserved as the time and frequency synchronous standard, the first encode element position of each sending channel is reserved as the phase position standard, and special synchronous spreading codes are used on the positions. According to the method provided by the invention, conventional carrier frequency offset extraction technology, carrier phase partial extraction technology and soft spread spectrum biorthogonal decoding method are improved specifically according to the requirement of the radar / radio frequency integrate realization, accompanied by the frequency offset tracking technology with Alpha -Beta as the core, accuracy of data deviation correction is guaranteed.

Description

technical field [0001] The present invention relates to radar communication technology. Background technique [0002] Through the organic combination of radar and communication equipment, a comprehensive radio frequency integrated system is formed, which not only helps to coordinate and control the work of electronic equipment on the combat platform in real time, allocate system resources reasonably, but also facilitates the generalization, miniaturization and Versatility. This has very important practical significance and military value for expanding the scope of application of military equipment and improving the overall combat effectiveness, reliability and maintainability of military electronic equipment. [0003] The existing research on radio frequency integration is mainly carried out on the phased array radar system, and the integrated working mode based on waveform sharing is one of the more popular research directions. However, due to the limitation of its own wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00G01S7/28
Inventor 刘娜刘周李军孙颖何子述
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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