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Pulse Doppler radar detection and communication integrated waveform design method

A technology of pulse Doppler and waveform design, applied in the direction of radio wave measurement systems, instruments, etc., to improve the anti-interference ability, increase the possibility, and ensure the effect of synthesis bandwidth

Active Publication Date: 2021-05-07
10TH RES INST OF CETC
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Problems solved by technology

[0007] The present invention aims at the existing problems and deficiencies in the existing radar communication integrated signal design
To overcome the shortcomings of the existing integrated signal waveform

Method used

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  • Pulse Doppler radar detection and communication integrated waveform design method
  • Pulse Doppler radar detection and communication integrated waveform design method

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Embodiment Construction

[0017] figure 2 . According to the present invention, the detection radar and the receiving terminal carry out two-way communication modulation to transmit the communication information, and the communication information is modulated by the frequency point and repetition period of the carrier, and the intentional modulation of the repetition period of the pulse Doppler radar is used to transmit the communication information between the pulse groups. The change of repetition frequency is used to realize information modulation and time synchronization; within time t, the radar transmission waveform is composed of pulse group M2 by the Mth transmission, and pulse group N1 and pulse group N2 by the Nth transmission. The communication receiver embedded in the broadband The OFDM spectrum in the noise is intercepted, and then demodulated, using the echo of the entire signal to process, extract the target information, the transmitter transmits the electromagnetic wave through the ant...

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Abstract

The invention discloses a pulse Doppler radar detection and communication integrated waveform design method. The method has covert communication and good precision. According to the technical scheme, information modulation and time synchronization are achieved through intentional modulation of a pulse Doppler radar repetition period and change of repetition frequency between pulse groups; a communication receiver intercepts an OFDM frequency spectrum embedded in broadband noise, data demodulation is achieved by extracting parameters, the receiver transmits a waveform in a data response pulse segment, a transmitted signal falls in a processing time window of a detection radar, pulse of a frame synchronization pulse segment is subjected to pulse group M2 repetition period estimation and initial position synchronization, and the data response pulse segment is subjected to pulse group M2 repetition period estimation and initial position synchronization to realize reverse asynchronous data transmission between the detection radar and the receiving terminal, and the data and a corresponding processing time window are predicted. In the signal receiving process of the receiving terminal, information is extracted through signal processing equipment, and fusion based on radar communication integration is carried out from the aspects of hardware and waveforms.

Description

technical field [0001] The invention relates to a detection and communication integrated waveform design method for pulse Doppler radar. Especially pulse Doppler radar sounding integrated waveform design method. Background technique [0002] Traditionally, it is generally believed that the signal characteristics of communication and radar detection are significantly different. Radar equipment is a device used for target detection and identification, with target detection and identification as the main purpose. Communication equipment is a device used to realize the effective transmission of information between equipment, and the detection function cannot be taken into account during communication. There are many differences in functions and working principles between radar and communication, but there are also commonalities in hardware structure and working frequency band. On the one hand, most of the signals sent by radar detection waveforms are regular structured signals...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28G01S7/41
CPCG01S7/28G01S7/41Y02A90/10
Inventor 李向阳李贵郭花增
Owner 10TH RES INST OF CETC
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