发明申请
US20120313697A1 APPARATUS AND METHOD FOR DEMODULATING AN INPUT SIGNAL 有权
用于解调输入信号的装置和方法

APPARATUS AND METHOD FOR DEMODULATING AN INPUT SIGNAL
摘要:
The invention relates to an apparatus (300; 400; 500; 600) for demodulating an input signal (306; 402; 520), comprising a frequency detector (302; 403; 502.1, . . . , 502. N; 603) for tracking a frequency (f2; fd1, . . . , fdN) of the input signal (306; 402; 520), an oscillator (304; 410; 505; 605, 606) and a mixer (305; 408; 507; 608, 609), wherein the input signal (306; 402; 520) and an output signal (307; 409) of the oscillator (304; 410; 505; 605, 606) constitute the incoming signals for the mixer (305; 408; 507; 608, 609) and the output signal of the mixer (305; 408; 507; 608, 609) constitutes the demodulated input signal, wherein an arithmetic unit (303; 404; 504; 604) is arranged downstream of the frequency detector (302; 403; 502.1, . . . , 502. N; 603) and upstream of the oscillator (304; 410; 505; 605, 606), wherein the tracked frequency (f2; fd1, . . . , fdN) of the input signal (306; 402; 520) and a predefined second frequency (f1; faux1, . . . , fauxM) constitute the incoming signals of the arithmetic unit (303; 404; 504; 604) and the arithmetic unit (303; 404; 504; 604) is designed such that it computes a control signal (f3; f4; fo1, . . . , foP) for the oscillator (304; 410; 505; 605, 606) from the tracked frequency (f2; fd1, . . . , fdN) of the input signal (306; 402; 520) and the predefined second frequency (f1; faux1, . . . , fauxM) with the output signal (307; 409) of the oscillator (304; 410; 505; 605, 606) depending on the control signal (f3; f4; fo1, . . . , foP). The invention furthermore relates to a method for demodulating an input signal (306; 402; 520) with such an apparatus (300; 400; 500; 600).
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