09 2020 档案
摘要：Channel Coding Communication through noisy channels is subject to errors. In order to decrease the effectof errors and achieve reliablecommunication,
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摘要：Matlab Coding 1 % MATLAB script for Illustrative Problem 10.2. 2 echo on 3 pn0_db=[-20:0.1:30]; 4 pn0=10.^(pn0_db./10); 5 capacity=3000.*log2(1+pn0/30
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摘要：Channel Capacity and Coding The objective of any communication system is to transmit information generated by aninformation source from one location t
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摘要：Peak-to-Average Power Ratio in OFDM Systems A major problem in multicarrier modulation is the high peak-to-average power ratio(PAR) that occurs in the
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摘要：Spectral Characteristics of OFDM Signals The signals transmitted on the subcarriers of an OFDM system are mutually orthogonal in the time domain; that
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摘要：Use of a Cyclic Prefix to Eliminate Channel Dispersion In this section, we consider a method to mitigate channel dispersion. Matlab Coding https://www
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摘要：Demodulation of OFDM Signals As we have observed above, the modulator in an OFDM system can be implemented bycomputing the IDFT. The demodulator that
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摘要：Generation of an OFDM signal The modulator and demodulator in an OFDM system are usually implemented by useof a parallel bank of tuned filters based o
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摘要：Multicarrier Modulation and OFDM In this chapter, we describe the transmission of digital information on multiplecarriers. In multicarrier modulation,
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摘要：Clock Synchronization In this chapter we have seen that a popular implementation of theoptimal receiver makes use of matched filters and samplers at t
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摘要：Carrier Synchronization Synchronization is a methods to generate sinusoids with the same frequency and phase of the carrier at the demodulator. A carr
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摘要：Probability of Error for QAM in an AWGN Channel Matlab Coding 1 % MATLAB script for Illustrative Problem 7.6. 2 echo on 3 SNRindB1=0:2:15; 4 SNRindB2=
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摘要：Demodulation and Detection of QAM (Quadrature Amplitude Modulation) Matlab Coding For the M = 8 QAM signal constellation shown in Figure 7.21(b) that
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摘要：Quadrature Amplitude Modulation Reference, 1. <<Contemporary Communication System using MATLAB>> - John G. Proakis
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摘要：The Optimum Detector and Probability of Error of Binary PSK Matlab Coding, Note, The detector maks a decision which is based on selecting the signal p
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摘要：Phase Demodulation and Detection Matlab Coding 1 % MATLAB script 2 3 M = 4; 4 Es = 1; % Energy per symbol 5 T = 1; 6 Ts = 100/T; 7 fc = 30/T; 8 t = 0:
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摘要：Carrier-Phase Modulation We observe that binary phase modulation is identical to binary PAM (binary antipodal signals). Matlab Coding 1 % MATLAB scrip
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摘要：Demodulation of PAM Signals Matlab Coding 1 % MATLAB script 2 echo on 3 T=1; 4 delta_T=T/200; % sampling interval 5 alpha=0.5; % rolloff factor 6 fc=4
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摘要：Carrier-Amplitude Modulation There are four types of carrier-modulated signals are suitablefor bandpass channels: amplitude-modulated signals, quadrat
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摘要：Multidimensional Signals In the preceding section we constructed multiamplitude signal waveforms, which allowedus to transmit multiple bits per signal
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摘要：Signal Waveforms with Multiple Amplitude Levels Matlab Coding, 1 % MATLAB script for the probability of a symbol error for M = 2, 4, 8, 16 2 echo on 3
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摘要：Multiamplitude Signal Transmission In the preceding section, we treated the transmission of digital information by use ofbinary signal waveforms. Thus
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摘要：Signal Constellation Diagrams for Binary Signals Matlab Coding 1 % MATLAB script 2 echo on 3 x = [0.1,0.3,0.5]; 4 5 for i = 1:3 6 n0=x(i)*randn(100,1)
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摘要：Simulation of a Binary Communication System Monte Carlo computer simulations are usually performed in practice to estimate theprobability of error of
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摘要：The Detector The detector observes the correlator or matched filter outputs ro and r1 and decideson whether the transmitted signal waveform is s0 ( t)
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摘要：Matched Filter The matched filter provides an alternative to the signal correlator for demodulatingthe received signal r(t). A filter that is matched
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摘要：Optimum Receiver for the AWGN Channel The optimum receiver for the AWGN channel consists of two building blocks. One is either a signal correlator or
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摘要：Introduction of Binary Signal Transmission In a binary communication system, binary data consisting of a sequence of O's andl's are transmitted by mea
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摘要：At the transmitter, the sequence of information bits is fed into a symbol mapper that maps a block ofbits into signal points {sd selected from a signa
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摘要：At the transmitter, the sequence of information bits is fed into a symbol mapper that maps a block ofbits into signal points {sd selected from a signa
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摘要：1 % MATLAB script for Illustrative Problem 11.7 2 3 SNR_dB = 0:5:20; SNR = 10.^(SNR_dB/10); 4 L = length(SNR); 5 % Initialization: 6 C1 = zeros(1,L);
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