基本思路:对LTI系统,由于其具有叠加性,齐 次性,时不变性,故而,如能实现将任意信号在时域分解为 简单单元信号的线性组合,那么只要得到LTI系统对基本 信号的响应,就可以利用系统的线性特性,将系统的输 出响应表示成系统对基本信号的响应的线性组合
文件格式: PPT大小: 1.23MB页数: 70
Introduction (chapter objectives) Bit error rate for binary systems (unipolar, polar, bipolar, ooK, BPsK, FsK, and MSK Output signal-to-noise ratio for analog systemS(AM, SSB, PM, and Fm)
文件格式: PPT大小: 4.03MB页数: 52
Introduction (chapter objectives) Power spectral density Matched filters Recall former Chapter that random signals are used to convey information. Noise is also described in terms of statistics. Thus, knowledge of random signals and noise is fundamental to an understanding of communication systems
文件格式: PPT大小: 1.8MB页数: 45
5. Introduction (Chapter objectives) Amplitude modulation and single sideband Frequency and phase modulation Digitally modulated signals(OoK, BPSK, FSK, MSK MPSK, QAM, QPSK, a/4QPSK, and OFDM) Spread sprectrum and CDMa system
文件格式: PPT大小: 12.76MB页数: 120
Introduction (chapter objectives) Complex envelopes and modulated signals Spectra of bandpass signals Nonlinear distortion · Communication circuits(mixers, phase- locked loops, frequency synthesizers, and detectors) Transmitters and receivers · Software radios
文件格式: PPT大小: 7.73MB页数: 89
3.9 Time-Division Multiplexing Definition. Time-division multiplexing (TDM) is the time interleaving of samples from several sources so that the information from these sources can be transmitted serially over a single communication channel
文件格式: PPT大小: 4.16MB页数: 23
Chapter Objectives Analog-to-digital signaling(PCM and delta modulation) Binary and multilevel digitals signals Spectra and bandwidths of digital signals Prevention of intersymbol interference Time division multiplexing Packet transmission
文件格式: PPT大小: 8.32MB页数: 100
Introduction Basic signal properties(dc, rms, dBm. and power) Fourier transform and spectra Linear systems and linear distortion Bandlimited signal and sampling Discrete Fourier transform · Bandwidth of signal
文件格式: PPT大小: 8.48MB页数: 69
Introduction Basic signal properties(dc, rms, dBm, and power) Fourier transform and spectra Linear systems and linear distortion Bandlimited signal and sampling Discrete Fourier transform Bandwidth of signal
文件格式: PPT大小: 8.01MB页数: 59
Chapter One Introduction Why? Information Age Information Superhighway
文件格式: PPT大小: 1.1MB页数: 36