TESTING DIGITAL COMMUNICATIONS TRANSMITTERS AND RECEIVERS

摘要

There is a fundamental tradeoff in communication systems. Simple hardware can be used in transmitters and receivers to communicate information. However, this method uses a lot of spectrum, which limits the number of users. Alternatively, more complex transmitters and receivers can be used to transmit the same information over less bandwidth. The transition to more spectrally efficient transmission techniques requires more complex hardware. Complex hardware is difficult to design, test and build. This tradeoff exists whether communication is over air or wire, analog or digital.