Q3/ Twenty-four voice signals are sampled uniformly and then have to be time division multiplexed. The highest frequency component for each voice signal is equal to 3.4 KHz. i) If the signals are pulse amplitude modulation using Nyquist rate sampling, what would be the minimum channel bandwidth required? (ans. BW = 81.6 KHz) ii) %3D If the signals are pulse code modulated with an 8 bits encoder, what would be the sampling rate? The bit rate of system is given as 1.5 x 106 bits/sec. (ans. fs = 7812.5 Hz or samples/sec)

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Quantization and Resolution

Quantization is a methodology of carrying out signal modulation by the process of mapping input values from an infinitely long set of continuous values to a smaller set of finite values. Quantization forms the basic algorithm for lossy compression algorithms and represents a given analog signal into digital signals. In other words, these algorithms form the base of an analog-to-digital converter. Devices that process the algorithm of quantization are known as a quantizer. These devices aid in rounding off (approximation) the errors of an input function called the quantized value.

Probability of Error

This topic is widely taught in many undergraduate and postgraduate degree courses of: