PPT-Chapter 6. Sampling and Pulse Modulation

Husheng Li The University of Tennessee Chopper Sampling We introduce a switching function such that xs txtst where Nyquist Criterion The sampling rate should be at least twice the bandwidth of the signal in order to fully reconstruct the signal. 0 BASIC TECHNIQUE This application note describes a technique for creating an analog to digital converter using a microcontroller with other low cost components Many applications do not require the speed associated with a dedicated hardware AD conver Common means of modulating data in digital communication Key advantage is that I can send mu ltiple signals using Time Division Multiplexing There are several pulse modulation techniques Pulse Amplitude Modulation Pulse Width Modulation Pulse 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. Name : Yi-. wei. . chen. Student number : r02942096. Shearing. Sheep shearing?.  . To remove (fleece or hair) by cutting or clipping.. Motions . in the time-frequency distribution. Multiply chirp function. 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. 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.. Wayne Maxwell. Martin Cacan. Christopher . Haile. Presentation Roadmap. Introduction and Background. Applicable Definitions. Pulse Width Modulation. Duty Cycle. Advantages/Disadvantages. PWM Types. Methods of PWM Generation. Analogue to Digital Conversion. Quantizing. Encoding. Pulse Code Modulation. DEFINITION: . Pulse code modulation (PCM) is essentially analog-to-digital conversion of a special type where the . information . Audio/video signals are . analog. in nature. Analog signals can take . infinite. number of values. Hence more difficult to detect at receiver after noise corruption. PCM converts analog signals to digital pulses. Code division multiple access Steps in CDMA Modulation. CDMA is a spread spectrum multiple access technique. https://store.theartofservice.com/the-modulation-toolkit.html. Code division multiple access Steps in CDMA Modulation. . ). 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.. EE305 Power Electronics. Voltage control in inverters-Types. Internal Control of the Inverter (PWM for voltage and harmonic control. External control of the AC output voltage. External control of the DC input voltage. 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. GRE-90-23 and GRE-90-35. Rationale for introducing a new pulse modulations. Frame . length. : 4.16. ms. = 217Hz . Slot length: 577µs. This corresponds to PM (217Hz, 577µs)!. Conclusion:. PM1 (217Hz, 577µs) is suitable to emulate 2G..