Title: Non-perfect carrier amplitude demodulation method and its device
Application Number: 200410066918 Application Date: 2004.09.30
Publication Number: 1756072 Publication Date: 2006.04.05
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03D1/04
Applicant(s) Name: Shanghai Beiling Co., Ltd. Address: 200233
Inventor(s) Name: Wang Xiangli
Attorney & Agent: zhang weiqiang
Abstract:
     The invention relates to a amplitude demodulation method of non-ideal carrier wave which follows the step that multiplying the modulated signal and the carrier wave signal to realize the modulation, and comprises following steps: the first channel multiplies the modulates signal with carrier wave signal again to be output via the low-pass filter, and using said output signal as dividend; at the same time, the second channel squares the carrier wave signal to be output via the low-pass filter and using said output signal as divisor; at last, dividing the signals of said two channels in the divider to realize the amplitude demodulation of non-ideal carrier wave. The invention comprises the advantages that: it can realize the amplitude demodulation of non-ideal carrier wave; when the carrier wave is ideal, the invention also can realize the amplitude demodulation; the total structure of amplitude demodulation circuit is simple and easily to be realized and The invention can both apply the analog signal processing system and the digital signal processing system.
Time: 12