PPT-Quadrature Amplitude Modulation (QAM) Transmitter

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. By Arne Svensson Fellow IEEE ABSTRACT A major disadvantage with fixed modulation nonadaptive on channels with varying signaltonoise ratio SNR is that the biterrorrate BER probability performance is changing with the channel quality Most applications 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. Transmitters & Receivers. Transmitters. The diagram is only to show the basic functions within a transmitter not to relate to any particular transmitter. . 1= Audio Stage. 2= Modulator AM/FM/SSB . Converting . digital data to a bandpass analog signal is traditionally called . digital-to-analog . conversion. . Converting . a low-pass analog signal to a bandpass analog . signal is . traditionally called analog-to-analog conversion. . 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, . By Amir . Taherin. Eng. M. . Zamanian. Contents. Definition. 1. History. 2. V.21, V.22, V.22bis. 3. Modulation. 4. Contents. Amplitude shift keying (ASK). 5. Frequency shift keying (FSK). 6. Phase shift keying (PSK). Techniques . ( 24 marks). Visit for more Learning Resources. Transmission Techniques. Baseband . Transmission . The electrical equivalent of original information is known as the . baseband signal. . Digital. . Modulation. Announcements:. Slides from . Cioffi. guest lecture posted. . HW 1 solutions posted, graded HWs available soon.. Review . of Lecture 8 (last Wednesday). AM Radio Modulation and Demodulation. Tenenbaum, . Wetherall. (uploaded on Canvas). Communication. Exchange of information from point A to point B. 100001101010001011101. 100001101010001011101. Transmit. Receive. Wireless Communication. . ). Data Transmission And Digital Communication. Lecture 5– 2019/1440. By: Elham Sunbu. OUTLINE. Sampling.. Pulse Amplitude Modulation .. Analogue to Digital conversion.. Sampling (PCM).. Pulse Code Modulation Advantages.. Lecture 2– 2019/1440. By: Elham Sunbu. OUTLINE. Modulation. Analog Modulation.. AM. FM. PM. Digital Modulation.. Modulation. Operation of varying amplitude, frequency or phase of carrier signal accordingly with the instantaneous amplitude of the message signal.. . Normal Amplitude Modulation. Lecture . 1-3. University of . Mustansiriyah. College of Engineering. Department of Computer Engineering . Ch. 5 – Frequency Modulation (FM) Transmission. 2/23/2010. 1. R. Munden - Fairfield University. Objectives. Define . angle modulation. and describe the two categories. Explain a basic capacitor microphone FM generator and the effects of voice amplitude and frequency.