POWER LINE COMMUNICATION “Power line communications (PLC) is a global technology with worldwide interest in its development. In its simplest terms‚ PLC modulates communication signals over existing power lines. This enables devices to be networked without introducing any new wires or cables. This capability is extremely attractive across a diverse range of applications that can leverage greater intelligence and efficiency through networking.” - Texas Instruments. Introduction: Let me start
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frequency is known as – * subcarrier * This is detector circuit for a specific phase of the modulated signal‚ necessary with a suppressed-carrier signal. * synchronous demodulator * This is the transmission of the modulation sidebands without the carrier itself. * suppressed subcarrier * The complimentary color for red is. * cyan * The complimentary color for blue is. * yellow *
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path. 2. What is a frequency-shift-keying system? Describe two methods of generating FSK. Frequency-shift keying (FSK) is a method of transmitting digital signals. 6. Explain a method used to generate BPSK using Figure 10-5 as a basis. Need for modulation 1) to reduce the antenna height 2) to multiplex the more number of signals 3) to reduce the noise & distortions 4) to narrow banding the signal 8. What is coherent carrier recovery? The received BPSK signal is fed into the mixer circuit.
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Outline: Amplitude Modulation Systems: Frequency translation‚ recovery of base signal‚ amplitude modulation‚ maximum allowable modulation‚ square law demodulator‚ spectrum of AM signal modulators‚ balanced modulator‚ single sideband‚ vestigial sideband and compatible single sideband system‚ multiplexing. Frequency Modulation Systems: Angle modulation‚ phase and frequency modulation‚ relationship between phase and frequency modulation‚ spectrum of FM signal effect of modulation index on bandwidth
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’ $ Noise Analysis - AM‚ FM The following assumptions are made: • Channel model – distortionless – Additive White Gaussian Noise (AWGN) • Receiver Model (see Figure 1) – ideal bandpass filter – ideal demodulator & % ’ Modulated signal s(t) x(t) $ Demodulator Σ BPF w(t) Figure 1: The Receiver Model • BPF (Bandpass filter) - bandwidth is equal to the message bandwidth B • midband frequency is ωc . Power Spectral Density of Noise • and is defined for both positive
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References: 1. Eric Lawrey‚ 2001. “The suitability of OFDM as a modulation technique for wireless telecommunications‚ with a CDMA comparison ”PhD thesis‚ Computer systems engineering at James Cook University‚ 334 World Appl. Sci. J.‚ 12 (3): 330-335‚ 2011 2.
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element length of 20 milliseconds (.02 seconds) is equivalent to a 50-baud keying speed. Frequency measurements of the FSK signal are usually stated in terms of “shift” and cen- DATA Binary FSK (usually referred to simply as FSK) is a modulation scheme typically used to send digital information between digital equipment such as teleprinters and computers. The data are transmitted by shifting the frequency of a continuous carrier in a binary manner to one or the other of two discrete
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communication channels‚ modulation process‚ and communication networks • Representation of signals and systems: Signals‚ Continuous Fourier transform‚ Sampling theorem‚ sequences‚ z-transform‚ convolution and correlation. • Stochastic processes: Probability theory‚ random processes‚ power spectral density‚ Gaussian process. & • Modulation and encoding: % ’ Basic modulation techniques and binary data transmission:AM‚ FM‚ Pulse Modulation‚ PCM‚ DPCM‚ Delta Modulation • Information theory: Information
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CMOS DESIGN AND ANALYSIS OF ULTRA WIDE BAND RECEIVERS ABSTRACT Ultrawide band is a unique technology which is used for commercial communications. In this ‚I will explain about UWB and how to integrate it with CMOS technology.This is by designing a UWB receiver using CMOS technology. Use Verilog to build behavioral model of LNA‚mixer‚bandpass filter‚integrator.Instante the components in Cadence and run simulation in time domain. In this paper ‚I have specified the design considerations of ultra
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secured wireless Mobile Internet services with value-added QoS. This paper gives the reasons for the evolution of 4G‚ though 3G has not deployed completely. And then gives the information on the structure of the transceiver for 4G followed by the modulation techniques needed for the 4G. Later this gives the information about the 4G processing .Finally concludes with futuristic views for the
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