DIGITAL DEMODULATOR ARRANGEMENT FOR QUADRATURE SIGNALS

摘要

DIGITAL DEMODULATOR ARRANGEMENT FOR QUADRATURE SIGNALS A direct conversion receiver in which the quadrature I and Q signals are converted into pulse density modulated digital data streams by delta-sigma modulators 14, 15. The resultant digital data streams are then processed in a logic block 18 according to predetermined logic truth tables. The digital output of the processor 18 is then converted back to an analogue signal.