Mobile Communications Handbook, 3rd Edition

2

Pulse Code Modulation^*

 

Leon W. CouchII

2.1 Introduction

2.2 Generation of PCM

2.3 Percent Quantizing Noise

2.4 Practical PCM Circuits

2.5 Bandwidth of PCM

2.6 Effects of Noise

2.7 Nonuniform Quantizing: µ-Law and A-Law Companding

2.8 Example: Design of a PCM System

References

Further Reading

2.1 Introduction

 

Pulse code modulation (PCM) is analog-to-digital conversion of a special type where the information contained in the instantaneous samples of an analog signal is represented by digital words in a serial bit stream.

If we assume that each of the digital words has n binary digits, there are M = 2ⁿ unique code words that are possible, each code word corresponding to a certain amplitude level. Each sample value from the analog signal, ...