Digital Modulation Schemes
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Transcript of Digital Modulation Schemes
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Digital Modulation Schemes
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transmitter
receiver
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Transmission
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Modulation
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Amplitude Modulation
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Double Sideband Spectrum
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QPSK modulation
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In Practice
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RZ and NRZ Line Codes & spectra
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Nyquist Pulses for zero-ISI
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Raised Cosine Spectrum
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Spectrum of Raised Cosine pulse
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Raised Cosine pulses
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RF signal using Raised Cosine
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Gaussian pulse-shapes
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Virtue of pulse shaping
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BPSK constellation
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BPSK Coherent demodulator
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QPSK receiver
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FSK Coherent Detection
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Noncoherent FSK
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MSK modulation
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MSK reception
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Minimum Shift Keying spectra
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GMSK spectral shaping
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GMSK spectra shaping
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Simple GMSK generation
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GMSK Demodulator
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Digital GMSK demodulator
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8-PSK Signal Constellation
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Bandwidth vs. Power Efficiency
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Pulse Shaped M-PSK
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16-QAM Signal Constellation
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QAM efficiencies
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M-ary FSK efficiencies
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PN Sequence Generator
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Direct Sequence Spread Spectrum
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Direct Sequence Spreading
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Frequency Hopping Spread Spectrum
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CDMA – Multiple Users
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Effects of Fading
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Irreducible Bit Error Rate due to multipath
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Irreducible Bit Error Rate due to multipath
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Simulation of Fading and Multipath
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Irreducible BER due to fading
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Irreducible BER due to fading
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BER due to fading & multipath
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Back Up
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Product Detection
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Slope Detector for FM
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Digital Demod for FM
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PLL Demod for FM
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FM Demod circuit