Transmission Techniques for 4G Systems

Chapter 3

Enhancement Techniques for 4G Systems

3.1 Channel Coding

In the design of the first digital communication systems, the solution commonly employed to obtain low-bit-error probabilities consisted of transmitting at high powers and using bandwidths larger than what is strictly necessary. The obvious problem with these approaches was that the performance improvements were accomplished at the cost of using more of the most precious resources: spectral bandwidth and/or power. In Shannon [1948] showed that performance improvement can be obtained ...