目前在移动通信中应用的多址方式有：频分多址（FDMA）、时分多址（TDMA）、码分多址（CDMA）以及它们的混合应用方式等。 蜂窝系统中是以信道来区分通信对象的，一个信道只容纳一个用户进行通话，许多同时通话的用户，互相以信道来区分，这就是多址。

This study was designed to determine whether chronic exposure to radiofrequency (RF) radiation from cellular phones increased the incidence of spontaneous tumors in F344 rats. Eighty male and 80 ...

This is a preview. Log in through your library . Abstract To determine if radiofrequency (RF) radiation induces the formation of micronuclei, C3H 10T 1/2 cells were exposed to 835.62 MHz frequency ...

The GLONASS-K satellite, transmitting a CDMA signal in the L3 band, inaugurates a new era of radionavigation signals for both the Russian system and for international GNSS interoperability. As demand ...

Single Carrier FDMA has been recently considered as a promising uplink transmission Scheme for next generation mobile communications due to its low peak-to-average power ratio. In this project we ...

ITS name hardly trips off the tongue. But thanks to a boffin from Bell Labs in New Jersey, plus the rise of the microprocessor and some engineers in San Diego who wouldn't take no for an answer, ...