Multi-Radio/standards RF tranceivers

Hi All,

In modern practical smartphones, there are multi-radio/standards RF tranceivers, including GSM, GPS, WiFi, LTE.... A few questions come to my mind.

1. How these multi-standards RF transceivers work together? Considering interferences among different-standard RF tranceivers...

2. How many antennas are required?

Hope you could help point me articles/papers giving an overview of mutil-radio/standards RF tranceivers along with antennas in modern wireless systems (e.g., smartphone).

Thanks a lot.

You can simply assume that GSM/LTE, WiFi and GPS are using separated RF frontends and antennas. Antennas might be shared through diplexers in some cases.

They didn't works together. If @ GSM 900 no free channels it move to @ 1800. Some providers has only target bands, for instance only 1800.
And it isn't full mode it is semi duplex. Antennas of course should be multi band, it is piece of art.