Diverse well describes the myriad digital modulation schemes used in modern voice and data communications. The alphabet soup of terminology extends well beyond the familiar QAM and GMSK fundamentals ...

Like other wireless standards, the CDMA air interface has gone through a major overhaul in the last few years. In order to support 3G class services, the CDMA community have added standards like ...

Emerging wireless standards bear many implementation challenges. A technology like Wideband Code Division Multiple Access (W-CDMA), for example, is new territory for many designers. Its signals are ...

Spread spectrum communications is a method of spreading information signals (typically digital signals) so the frequency bandwidth of the radio channel is much larger than the original information ...

Voice service is a type of communication service where two or more people can transfer information in the voice frequency band (not necessarily voice signals) through a communication network. The ...