| Title |
Demodulation and Performance of Multicomponent Undersampled AM, FM and AM-FM Signals |
| Authors |
손태호(Son, Tae-Ho) ; 황의천(Hwang, Ui-Cheon) |
| Keywords |
Nonlinear demodulation ; Multicomponent signals ; Augmented separation matrix ; Undersampling frequency |
| Abstract |
We propose an nonlinear demodulation algorithm for undersampled multicomponent AM(Amplitude Modulation), FM(Frequency Modulation) and AM-FM signals. First, we derive respectively undersampling frequency of the AM, FM and AM-FM using undersampling scheme, and separate respectively monocomponent signals from multicomponent signals using periodic algebraic separation algorithm. In this case augmented separation matrix is very regular and sparse, it has a special structure. The proposed demodulation algorithm detects respectively message signals of the IA(Instantaneous Amplitude) and IF(Instantaneous Frequency) from descrete monocomponent AM, FM and AM-FM signals with an undersampling frequency to be controllable. Verifying the RMS(Root Mean Squares) errors of the detected signals, we show that the performance is excellent. |