Wireless high-speed data communication using terahertz (THz) carrier frequencies is becoming reality with data rates beyond 100 Gbit s –1. Many of the mobile applications use internet access and ...

AM, or amplitude modulation, was the earliest way of sending voice over radio waves. That makes sense because it is easy to modulate a signal and easy to demodulate it, as well. A carbon microphone is ...

A laboratory investigation is described of the overall performance of a compatible single sideband (c.s.s.b) system when used with current types of domestic receivers. The systems employs an ...

The circuit in Figure 1 complements a previous Design Idea (“SSB modulator covers HF band,” EDN, Sept 30, 1999, pg 122). The modulator employs a phasing network to split a low-frequency audio signal ...

Field tests are described which investigate the transmission of compatible-single-sideband signals from a typical high-power transmitter for high-frequency broadcasting and which compare reception of ...