Q2/ The information in an analog signal voltage waveform is to be transmitted over a PCM system with an accuracy of ±0.1% (full scale). The analog voltage waveform has a bandwidth of 100 Hz and an amplitude range of -10 to +10 volts. i) Find the minimum sampling rate required. (ans. f; 2 200 Hz ii) Find the number of bits in each PCM word. (ans. n = Find minimum bit rate required in the PCM signal. (ans.r > iii) 2800 bits/sec) 14 bits) iv) Find the minimum absolute channel bandwidth required for the transmission of the PCM signal. (ans. BW > 1400 Hz)
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
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