tdma and fdma
Roy Stehle has written: 'Alternative packet switch architectures for a 30/20 GHz FDMA/TDMA geostationary communication satellite network'
da-fdma
1G is based on frequency modulation,analog technology,TDMA 2G is based on digital technology,FDMA 3G is based on CDMA which is a faster internet access source
In FDMA all users share the satellite simultaneously but each user transmits at single frequency.FDMA can be used with both analog and digital signal.FDMA requires high-performing filters in the radio hardware, in contrast to TDMA and CDMA
TDMA stands for the time division multiple access
Currently the mobiles use GSM(Geo Synchronous Mobiles ) and CDMA(Code Division Multiple Accesss) techniques. GSM inturn uses TDMA(Time Division Multiplexing) or FDMA(Frequency Division Multiplexing) or sometimes both to fit in the required criteria.
The basic difference between OFDMA and SC-FDMA is that, there there is an additional block of N point DFT before the sub-channel mapping in SC-FDMA. This will effectively reduce the PAPR, thus the power amplifier will have a lesser linear range in SC-FDMA when compared with OFDMA
nokia tdma model 6560 schematic diagram i want
i think some are.
It is a digital standard for communications
The basic difference between fdm and fdma is that fdm is used in wired system where as fdma is used in wireless communication.