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INTRODUCTION AND BACKGROUND MATERIAL
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additive noise amplitude analog approximately assume autocorrelation average bandwidth baseband signal Bayes bit error rate bit rate bits of quantization block BPSK carrier channel chapter choose code words coherent communication system companding convolutional code correlation curve decoding demodulator density function detection digital communication encoding entropy envelope detector equal error probability example Figure Find the probability Fourier transform frame frequency Gaussian given illustrated in Fig incoherent detector increases integral intersymbol interference interval levels loop low-pass filter matched filter matched filter detector maximum multiplexing multiplied number of bits operation output performance phase possible power spectral density priori probabilities probability of error problem pulse random variable receiver result sample value sb(t Section sequence shown in Fig signal-to-noise ratio sinusoidal Solution spectrum square Suppose switching symbol synchronization techniques term threshold tion transmission rate transmitted variance voltage waveform zero