Digital-analog hybrid heterodyne detection receiving device and data processing method adopted by same
A digital-analog hybrid and heterodyne detection technology is applied in electromagnetic receivers, digital transmission systems, and modulated carrier systems. It can solve the problems of difficult hardware implementation and large Doppler frequency deviation, and achieve low phase noise and frequency Large dynamic range and the effect of carrier synchronization
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[0044] Hereinafter, the spirit and essence of the present invention will be further elaborated in conjunction with the drawings and embodiments.
[0045] Such as figure 1 As shown, the digital-analog hybrid heterodyne detection and receiving device provided by the present invention includes: a primary frequency conversion module, a secondary frequency conversion module and a demodulator module; the primary frequency conversion module includes: a pre-optical amplifier 1, an optical frequency mixer device 2, optical balance detector 3, optical local oscillator 4, Doppler compensation unit 5; the secondary frequency conversion module includes: bandpass filter 6, preamplifier 7, quadrature mixer 8, low-pass Filter 9, limiting amplifier 10, electric local oscillator 12, DDS control unit 11. Wherein said quadrature mixer 8, low-pass filter 9, limiting amplifier 10, electric local oscillator 12, DDS control unit 11 form a feedback loop, for eliminating the residual Doppler and tempe...
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