14
Transmitter Architectures
This chapter describes the different types of radio transmitter architectures, history of radio communication, conventional types of radio transmission, and modern communication systems. Amplitude-modulated transmitters representing the oldest technique for radio communication are based on high- or low-level modulation methods, with the particular case of an amplitude keying. Single-sideband transmitters as the next-generation transmitters could provide higher efficiency because of the transmission of a single sideband only. Frequency-modulated transmitters then became a revolutionary step to improve the quality of a broadcast transmission. TV transmitters include different modulation techniques for transmitting audio and video information, both analog and digital. Wireless communication transmitters as a part of the cellular technologies provide a worldwide wireless radio access. Radar transmitters are required for many commercial and military applications such as phased-array radars, automotive radars, or electronic warfare systems. Satellite transmission systems contribute to worldwide transmission of any communication signals through satellite transponders and offer communication for areas with any population density and location. Ultra-wideband transmission is very attractive for its low-cost and low-power communication applications, occupying a very wide frequency range.
14.1 AMPLITUDE-MODULATED TRANSMITTERS
Amplitude-modulated transmitters whose ...
