signal of bandwidth 4 kHz is samples at Nyquist rate and transmitted using PCM with uniform quantization. If the number of quantization levels L is increased from 64 to 256. Find the following: The number of bits sample in the old and new PCM systems. The change in SNR measured in dB. (improved or decreased, and by how many times). The transmission bandwidth before and after increasing the quantization levels. Find the percentage of change in the bandwidth.
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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- A signal of bandwidth 4 kHz is samples at Nyquist rate and transmitted using PCM with uniform quantization. If the number of quantization levels L is increased from 64 to 256.
Find the following:
- The number of bits sample in the old and new PCM systems.
- The change in SNR measured in dB. (improved or decreased, and by how many times).
- The transmission bandwidth before and after increasing the quantization levels. Find the percentage of change in the bandwidth.
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