| 摘要 |
A signal mixing system comprises an array of signal coupler (202, 204, 206, 208 and 210) receiving a Doppler frequency-shifted signal (346) and a local oscillator signal (332). The system generates an in-phase signal that include the unphase-shifted local oscillator signal and a phase-shifted Doppler frequency-shifted signal. The system also generates in-quadrature signal that includes the phase-shifted Doppler frequency-shifted signal and a further phase-shifted local oscillator signal. Furthemore, the system comprises a plurality of signal detectors (214 and 216) receiving the in-phase and in-quadrature signals.
|
