Concerning 2G TDMA/GSM systems in the US and Europe What is the modulation used in the US TDMA (ie,...

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Concerning 2G TDMA/GSM systems in the US and Europe What is the modulation used in the US TDMA (ie, IS-136) system, and what is it in GSM (again, the original version, used in 2G)? Compare the modulations in terms of both spectral and power efficiency, using numbers and describing how you got them, for at least one comparison.

David · Accepted Answer

1. Concerning 2G TDMA/GSM systems in the US and Europe 
What is the modulation used in the US TDMA (ie, IS-136) system, and what is it in GSM (again, the 
original version, used in 2G)? Compare the modulations in terms of both spectral and power efficiency, 
using numbers and describing how you got them, for at least one comparison. 
Solution: 
Modulation Used = pi/4 DQPSK 
Modulation used in older GSM Technology = Gaussian minimum shift key (GMSK) 
IS-136: 
This standard also known as North American digital cellular (NADC).

Concerning 2G TDMA/GSM systems in the US and Europe What is the modulation used in the US TDMA (ie, IS-136) system, and what is it in GSM (again, the original version, used in 2G)? Compare the...

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