Multi-channel demodulation signal processing platform based on CPCI (compact programmable communication interface)

Abstract

The invention discloses a multi-channel demodulation signal processing platform based on a CPCI (compact programmable communication interface). The demodulation signal processing platform comprises a multi-channel intermediate-frequency signal receiving module; the multi-channel intermediate-frequency signal receiving module can be connected with at least one A / D (analog / digital) conversion module and at least one DDC (direct digital control) digital down converter module; the DDC digital down converter module is connected with an FPGA (field programmable gate array) module; and the FPGA module is connected with a DSP (digital signal processor) module and a CPCI module. By using the multi-channel demodulation signal processing platform based on the CPCI, which is provided by the invention, the analog signal reception and the digital signal sending are integrated into a whole; the parallel and independent A / D conversion module and a DDC digital down converter passage are adopted; at least one intermediate-frequency signal of satellite mobile communication can be received; the multi-channel demodulation signal processing is realized; and the signal processing platform is compatible with signal processing techniques with different modes, different systems and different speed rates, and has stronger practicability.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a multi-channel demodulation signal processing platform based on a CPCI interface. Background technique [0002] Satellite mobile communication is the communication between radio communication stations on the earth (including the ground and the lower atmosphere) using satellites as relays. The most suitable frequency for satellite communication is the 1-10GHz frequency band, that is, the microwave frequency band. In order to meet more and more demands, research and application of new frequency bands have begun, such as 12GHz, 14GHz, 20GHz and 30GHz. In the microwave frequency band, the working frequency bandwidth of the entire communication satellite is about 500MHz. In order to facilitate amplification, transmission and reduce modulation interference, several transponders are generally installed on the satellite, and the working frequency bandwidth of each transponder is 36MHz ...

AI Technical Summary

Problems solved by technology

[0004] In view of the characteristics of the above-mentioned satellite signals, the existing satellite signal processing platform is designed according to the specific requirements of the satellite communication system, using one of the applicable multiple access technologies, and cannot realize the compatibility of multiple technologies at the same time to meet higher requirements; On the other hand, the existing satellite signal processing platform does not perform bandwidth signal extraction and filtering, and cannot realize multi-channel signal processing

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