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Mixed spread spectrum communication system and working method thereof

A communication system and mixed spread spectrum technology, applied in the field of communication, can solve the problems of weak anti-interference ability of frequency hopping spread spectrum technology, increase of spread spectrum sequence, and decrease of data transmission rate, etc.

Active Publication Date: 2009-12-02
SOI MICRO CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] In order to solve the problems in the direct sequence spread spectrum technology, such as increasing the length of the spread spectrum sequence, the data transmission rate is reduced, and the anti-interference ability of the frequency hopping spread spectrum technology is weak, the present invention provides a hybrid spread spectrum communication system and its work method

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  • Mixed spread spectrum communication system and working method thereof
  • Mixed spread spectrum communication system and working method thereof
  • Mixed spread spectrum communication system and working method thereof

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Embodiment 1

[0100] see figure 1 , the embodiment of the present invention provides a hybrid spread spectrum communication system combining frequency hopping and direct sequence spread spectrum, the system includes a sending end and a receiving end. The transmitting end includes a baseband modulator 105, a mixer 103, a direct digital frequency synthesizer 104, a frequency synthesizer 102, a transmitting radio frequency processing module 101, and an antenna 100; the receiving end includes an antenna 100, a receiving radio frequency processing module 110, and a mixer 111 , mixer 119, frequency synthesizer 112, direct digital frequency synthesizer 114, intermediate frequency processing module 115, analog-to-digital conversion module 116 and baseband processing module 117;

[0101] The baseband modulator 105 is used to obtain a digital baseband direct spread signal after performing direct sequence spread spectrum on the transmission data;

[0102] Direct digital frequency synthesizer 104, is ...

Embodiment 2

[0142] see Figure 13 , the embodiment of the present invention also proposes a working method of a hybrid spread spectrum communication system combining frequency hopping and direct sequence spread spectrum, which specifically includes the following steps:

[0143] Step 1: The baseband modulator at the transmitting end performs direct sequence spread spectrum on the transmitted data to obtain a digital baseband direct spread signal;

[0144] The I direct spread spectrum sequence generator of the baseband modulator and the Q direct spread spectrum sequence generator generate the I direct spread spectrum sequence and the Q direct spread spectrum sequence respectively; the frequency hopping sequence generator of the baseband modulator generates the frequency hopping pseudo random sequence; the serial-to-parallel conversion module of the baseband modulator carries out serial-parallel conversion to the transmission data, and obtains I road data and Q road data; the direct sequence...

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Abstract

The invention relates to a mixed spread spectrum communication system and a working method thereof, and belongs to the technical field of communication. The system comprises a sending terminal and a receiving terminal, wherein the sending terminal comprises a baseband modulator, a first mixer, a first direct digital frequency synthesizer, a first frequency synthesizer, a transmission radio frequency processing module and a first antenna; and the receiving terminal comprises a second antenna, a receiving radio frequency processing module, a second mixer, a third mixer, a second frequency synthesizer, a second direct digital frequency synthesizer, an intermediate frequency processing module, a modulus converting module and a baseband processing module. The method comprises the following steps that: the sending terminal carries out direct sequence spread spectrum and hopping frequency carrier wave modulation on transmitted data to generate a hopping frequency radio frequency signal, and sends the hopping frequency radio frequency signal; and the receiving terminal receives the hopping frequency radio frequency signal, and carries out down-frequency conversion demodulation and baseband processing on the hopping frequency radio frequency signal to obtain output data. The system and the method can improve the confidentiality and the anti-jamming performance of a mobile communication system.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a hybrid spread spectrum communication system and a working method thereof. Background technique [0002] Spread spectrum communication has become the mainstream technology of communication development. It mainly includes the following methods: [0003] 1. Direct sequence spread spectrum: Spread the information to be sent to a very wide frequency band with a pseudo-random sequence. At the receiving end, use the same pseudo-random sequence as that at the transmitting end to correlate the received spread spectrum signals to recover the original information. Since the interference signal is not related to the pseudo-random sequence, it is expanded at the receiving end, so that the power of the interference signal falling into the signal frequency band is greatly reduced, thereby improving the output signal-to-noise ratio of the system and achieving the purpose of anti-interf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/69H04B1/38H04B1/692
Inventor 安勇牟荣增阎跃鹏
Owner SOI MICRO CO LTD
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