发明授权
US4583239A Digital demodulator arrangement for quadrature signals 失效
用于正交信号的数字解调器装置

Digital demodulator arrangement for quadrature signals
摘要:
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.
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