Comparison of 4.2 Mhz and 5 Mhz in 3G

3G / 2G
,
2

Hi Bro,

Only 3.84MHz is used for transmission, while the 116 kHz left acts as a built-in guard-band to adjacent UARFCN’s (580kHz + 3840kHz + 580kHz = 5MHz). If an operator owns the adjacent frequency bands, it is possible to reduce the size of the UMTS carrier from 5MHz to 4.4 or 4.2 MHZ, but this is not recommended.

please refer to he link for more details:

https://books.google.ru/books?id=aq0g934064wC&pg=PA114&lpg=PA114&dq=UMTS+guard&source=bl&ots=P6nf6zO6OL&sig=oLPNt-xorBNsAsWJvfl47vBxSzo&hl=ru#v=onepage&q=UMTS%20guard&f=false

2 Likes