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Short burst spread spectrum satellite signal receiving device

A technology of burst spread spectrum and receiving devices, which is applied in the field of short burst spread spectrum signal receiving devices, can solve problems such as inability to meet application requirements, and achieve the effects of simple and flexible external interfaces, easy expansion of functions, and stable and reliable performance

Active Publication Date: 2021-04-16
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, fast capture of burst spread spectrum signals and fast burst demodulation synchronization are key and difficult points, especially under low signal-to-noise ratio and high dynamic conditions, the use of traditional synchronization capture technology and phase-locked loop demodulation synchronization technology has been unable to meet the actual Application requirements

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  • Short burst spread spectrum satellite signal receiving device
  • Short burst spread spectrum satellite signal receiving device
  • Short burst spread spectrum satellite signal receiving device

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] refer to Figure 1 to Figure 7 , a short burst spread spectrum satellite signal receiving device, which is composed of sampling and analog-to-digital conversion circuit A, receiving control circuit B, burst detection circuit C, despreading and demodulation circuit D, interface processing circuit E and power supply circuit F.

[0030] Among them, the sampling and analog-to-digital conversion circuit A receives the analog IF signal input from the external intermediate frequency into the IF_IN interface through the input port 1, receives the management configuration output from the control circuit B from the port 2 through the input port 2, and receives the burst through the input port 4. The carrier frequency offset parameter input by the output port 4 of the detection circuit C is output to the input of ...

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Abstract

The invention discloses a short burst spread spectrum satellite signal receiving device, and belongs to the technical field of satellite relay communication. The device comprises a sampling and analog-to-digital conversion circuit, a receiving control circuit, a burst detection circuit, a dispreading and demodulating circuit, an interface processing circuit and a power supply circuit. A self-adaptive dynamic amplitude adjustment method is adopted to assist in quickly completing burst signal detection; a PM-FFT method combining partial matched filtering with rapid filtering is adopted to realize rapid capture and carrier frequency offset correction of burst spread spectrum signals; in addition, burst carrier synchronization is completed by adopting a data storage iterative feedback timing error elimination and phase average interpolation method without auxiliary data, and auxiliary carrier recovery and timing synchronization overhead do not need to be additionally increased for a transmission frame. The short burst spread spectrum signal receiving device can demodulate burst spread spectrum modulation signals under the conditions of high dynamic and low signal-to-noise ratio, which are not possessed by a common demodulation method, and is particularly suitable for being used as the short burst spread spectrum signal receiving device in a satellite communication system with high anti-interference and anti-interception requirements.

Description

technical field [0001] The invention relates to a short burst spread spectrum signal receiving device in a satellite communication system, belongs to the technical field of satellite relay communication, and can be used as a short burst spread spectrum signal receiving device in a satellite relay communication system with high anti-interference and anti-interception requirements . Background technique [0002] Short burst is a communication method that compresses and stores information first and sends it quickly at a suitable time period. Due to its strong randomness and short-term nature in time, it can better avoid threats such as interception and interference from the enemy. It is an effective anti-communication reconnaissance, anti-interception and anti-jamming technology. Spread spectrum is a transmission technology that extends the transmission bandwidth of narrowband signals to broadband frequencies. It has the characteristics of anti-interference, information concea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B1/16H04B1/7075
Inventor 汪颜乔先科孙南南张子赫
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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