A time-hopping pulse position keying telemetry method

A pulse position and time-hopping technology, which is applied to electrical components, transmission systems, etc., can solve the problems of low processing gain, weak anti-interference ability of time-hopping technology, and is rarely used alone, so as to achieve anti-interference and anti-intercept ability and improve Anti-intercept performance, reducing the effect of smoothing the signal spectrum

Inactive Publication Date: 2014-10-22
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
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Problems solved by technology

[0008]Referring to the above patent documents, it can be seen that time hopping technology is mainly used in the field of ultra wide band (UWB) radio communication. As one of the three basic spread spectrum technologies, time hopping The anti-interference of the technology itself is not strong, the processing gain is very low, and there is no real spread spectrum, so it is rarely used alone

Method used

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  • A time-hopping pulse position keying telemetry method
  • A time-hopping pulse position keying telemetry method
  • A time-hopping pulse position keying telemetry method

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Embodiment 1

[0037] The invention discloses a time-hopping pulse position keying telemetry method, which realizes multi-access communication of the PPK telemetry system through the time-hopping spread spectrum technology; and the receiving end completes multi-user detection by means of matching filtering.

[0038] For this embodiment, those skilled in the art can think of how to apply the time-hopping technology to digital pulse telemetry after seeing the description of the above technical solution, and how to realize multi-user detection at the receiving end by means of matched filtering. This embodiment breaks through people's traditional concepts, overcomes the prejudice that the time-hopping spread spectrum technology cannot be applied to the PPK telemetry system, and has the advantages of safety, confidentiality, strong anti-interference and anti-interception capabilities, and multi-access communication capabilities.

Embodiment 2

[0040]On the basis of Embodiment 1, the present invention proposes a better method of applying time-hopping spread spectrum technology to the PPK telemetry system, specifically: using time-hopping spread spectrum technology on the basis of the PPK system, each The user's message is grouped by frame (a frame is several information words) and added with a frame header, and sent to a buffer, and a certain bit is received in the buffer (the number of bits can be changed by setting the PPK channel word length, which is The multi-ary system is different from the traditional binary system. The binary system can only transmit 0 or 1, while the multi-ary system can transmit messages of 0, 1, 2, 3...). The system completes the PPK encoding of these messages through the PPK encoder; In the next step, the system assigns a unique time-hopping sequence to each user; using this unique time-hopping sequence, and according to the content of the transmitted PPK-encoded message, a unique burst fo...

Embodiment approach

[0055] Refer to the attached Figure 1-4 , as the best implementation mode of the present invention, its method is as follows:

[0056] 1. The message signal is first input into the buffer, and after being accumulated to L bits, the PPK encoding is completed by the PPK encoder;

[0057] 2. Then send the signal to the repeat encoder for repeated encoding, and then control the sending time slot of each PPK channel word through the time-hopping sequence;

[0058] 3. Use the signal generated in 2 to control the carrier through OOK to complete the IF modulation.

[0059] 4. Receive the signal at the receiving end, perform channel filtering and down-conversion, and obtain bursts of different users (these bursts are mixed together);

[0060] 5. The receiving end generates a time-hopping sequence consistent with the sending end, and performs matching filtering with the "burst" signal to obtain several correlation peaks belonging to the user;

[0061] 6. Recover the timing informati...

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Abstract

The invention discloses a novel time hopping-pulse position keying and telemetering method, and belongs to the field of wireless measurement and control communication. The multiple access communication of a PPK (pulse position key) telemetering system can be realized by adopting a time hopping frequency-spreading technique; and a receiving end completes the multiuser detection in a matched filtering mode. The method disclosed by the invention is safe, secret, anti-jamming, and strong in anti-intercepting capacity, and has the multiple access communication capacity.

Description

technical field [0001] The present invention relates to a safe, confidential, digital pulse telemetry method with anti-jamming, anti-interception capability and multi-access communication capability, to be precise, it is a traditional pulse position keying (PPK) telemetry method using time-hopping spread spectrum The new multi-ary system digital telemetry method belongs to the field of wireless measurement and control communication. Background technique [0002] The measurement method of special signals in my country's re-entry telemetry technology has developed from the earliest PPM (PPM: Pulse Position Modulation) modulation system based on pulse position to the current PPK (PPK: Pulse Position Key) telemetry system based on digital transmission. Among them, the PPM system is an analog transmission system, which is gradually replaced by the PPK telemetry system because it cannot directly transmit digital signals. As for the PPK system, it not only realizes the digital t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7163
Inventor 杨春张健罗启彬石磊
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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