PPT-DSB-SC Modulation and Demodulation

1 st semster 14361437 King Saud University College of Applied studies and Community Service 1302CT DSBSC Double Side Band Suppress Carrier DSBSC is one type of Amplitude Modulation. Standard Linear and Logic 6757 In telecommunications and signal processing frequency modulation FM is encoding of information on a carrier wave by varying the instantaneous frequency of the wave Digital data can be encoded and transmitted v The demodulation techniques for Binary Quadrature Phase shift Keying BPSK QPSK are well established and understood when implemented with analog circuits Recently state of the art digital technology allows Radio Frequency RF signals to be processed . 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. 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!). 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.. 3-2CONTINUOUS-WAVE DEMODULATIONContinuous-wave (cw) modulation consists of on-off keying of a carrier wave. To recover on-offkeyed information, we need a method of detecting the presence or absence of 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.. Modulation: embedding an information-bearing signal into a second signal. e.g. . purposes :. locate the signal on the right band of the spectrum. multiplexing : simultaneous transmission of more than . Modulation: embedding an information-bearing signal into a second signal. e.g. . purposes :. locate the signal on the right band of the spectrum. multiplexing : simultaneous transmission of more than . 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). Techniques . ( 24 marks). Visit for more Learning Resources. Transmission Techniques. Baseband . Transmission . The electrical equivalent of original information is known as the . baseband signal. . 교수님. 학습노트. 10. 2010104012. 한택희. Electromagnetic Spectrum. 1. Audio Frequency(20~20,000Hz). 2.Radio Frequency. A. Low . Freq. : 30kHz(10km)~300kHz(1km). *. 참고. : 300KHz . 전파하려면 안테나는 . Binary modulation schemes . ASK. , FSK, . PSK. n. = . 1, . M = 2 (Only Two . output conditions are . possible). Baud . is equal to . the bit . rate. M-. ary. Modulation Techniques. QPSK, 8-PSK, 18-PSK, QAM, 16-QAM. Example: ASK, FSK, PSK, QAM. Binary digital modulation. Multilevel digital modulation. Amplitude Shift Keying. Binary-ASK --- BASK. Or On-Off Keying OOK. Uses two amplitude levels for the modulated carrier .