A data terminal with an output bit rate of 56,000 bit/s is coded into eight possible amplitude levels using three successive binary digits. The eight levels of pulses are then pulse shaped using a raised-cosine filter before transmission. Find the required baseband bandwidths for transmission, for each of the following roll-off factors: a = 0.25, 0.5, 0.75, and 1. Which is the preferred roll-off factor in this transmission and explain why the roll-off factor was being chosen.
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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