PPT-Standard Amplitude Modulation (AM)

nalhareqi2013 1 Standard Amplitude Modulation AM nalhareqi2013 2 In the DSPSC demodulation a receiver must generate a local carrier in frequency and phase synchronism with the carrier used for modulation. 2 and 43 of S Haykin and M Moher Introduction to Analog Digital Communications 2nd ed John Wiley Sons Inc 2007 ISBN13 9780471432227 Professor Deepa Kundur University of Toronto Properties of Angle Modulation 2 25 Angle Modulation Phase Modulation Husheng Li. The University of Tennessee. Chopper Sampling . We introduce a switching function such that . x_s. (t)=x(t)s(t), where. Nyquist. Criterion. The sampling rate should be at least twice the bandwidth of the signal, in order to fully reconstruct the signal.. Section 6.6. DSB/SC-AM . Modulation (Review). Frequency Shift . Property (Review). Frequency Spectrum of DSB/SC-AM . Signal (Review). Carrier Signal for Amplitude Modulation. Pulse Amplitude Modulation. . Group B. Ali . Qasim. Haris. . Suhail. Imaan. Tariq. Mohsin. . Zafar. Arsalan. . Hameed. Abdul . Rahman. . Rida. . Zainab. Ehsanullah. . Zafar. Hassan . Iqbal. Amna. Aziz. Manal. Fatima. Qambar. nalhareqi-2013. 1. Standard Amplitude Modulation (AM). nalhareqi-2013. 2. In the DSP-SC demodulation, a receiver must generate a local carrier in frequency and phase synchronism with the carrier used for modulation.. Husheng Li. The University of Tennessee. Phase and Frequency Modulation. Consider the standard CW signal. We define the total instantaneous angle. Phase and Frequency Modulation. Phase modulation (PM). 1. Introduction. A digital signal is superior to an analog signal because it is more robust to noise and can easily be recovered, corrected and amplified. For this reason, the tendency today is to change an analog signal to digital data. In this section we describe two techniques, . Husheng Li. The University of Tennessee. AM Signals and Spectra. An AM signal can be written as. Power of AM. The total transmit power is given by. We can prove that, at least 50% (often close to 2/3) of the total transmitted power resides in a carrier term that is independent of the signal and thus conveys no message information. (what a waste!). Analog data to analog signal. (AM, FM, PM). Digital data to analog signal. (ASK, FSK, BPSK, QAM). Analog data to digital signal. (PCM, DM). Digital data to digital signal. (line codes). Signal Encoding Techniques (modulation and encoding). Amplitude Modulation (AM). Time domain equation. y. AM. (t. ) = . Information or message x carrier. . = . m(t) . x A cos(w. c. t. ). . Frequency domain equation. Double . sideband . Techniques . ( 24 marks). Visit for more Learning Resources. Transmission Techniques. Baseband . Transmission . The electrical equivalent of original information is known as the . baseband signal. . Lecture . 1-7. University of . Mustansiriyah. College of Engineering. Department of Computer Engineering . . Normal Amplitude Modulation. Lecture . 1-3. University of . Mustansiriyah. College of Engineering. Department of Computer Engineering . Prof. Brian L. Evans. Dept. of Electrical and Computer Engineering. The University of Texas at Austin. 15 - . 2. Introduction. Digital Pulse Amplitude Modulation (PAM). Modulates digital information (symbols) onto amplitude of pulse.