3 ms·
Pretty much everyone uses CDMA these days. 3G/UMTS and 4G/LTE are both based on CDMA, which transmits continuously, unlike 2G/GSM/EDGE, which transmits in puls
by p1mrx 10y ago
Pretty much everyone uses CDMA these days. 3G/UMTS and 4G/LTE are both based on CDMA, which transmits continuously, unlike 2G/GSM/EDGE, which transmits in pulses and makes the dit-dit-dit-bzzz sound in nearby speakers.
Edit: actually LTE uses OFDM, which is mathematically distinct from CDMA, but a naive receiver is unlikely to notice the difference.
- mkehrt 10y ago"CDMA" means something different than "code division multiple access" multiplexing when contrasted with GSM. Instead it refers to the CDMA2000 family of telephony protocols (https://en.wikipedia.org/wiki/CDMA2000 https://en.wikipedia.org/wiki/CDMA2000), which are a series of whole stack (radio modulation all the way up to text encoding schemes) protocols. Calling it "CDMA" is a branding thing than rather than having anything to do with multiplexing.