What spectrum does 3G use?
3G : 850 MHz Cellular, Band 5 (UMTS/ HSPA+ 21 Mbit/s). 1900 MHz PCS, Band 2 (GSM). 4G : 700 MHz Lower A/B/C, Band 12 (LTE). 1700/ 2100 MHz AWS, Band 4 (LTE).
What is frequency allocation table?
The National Frequency Table of Allocations is a compendium of frequency allocations to services applicable to Nigeria as well as a depiction of frequency usage in Nigeria. This table conveys the nation’s compendium prior to the World Radiocommunication Conference of 2015.
How many GHz is 3G?
3G works at frequencies up to 2.1Gigahertz, 4G up to 2.5Gigahertz and 5G can be up to 95 Gigahertz.
What is the purpose of a national spectrum allocation chart?
Spectrum allocation is a planning function which involves the designation of portions of the frequency spectrum to specified uses in accordance with international agreements, technical characteristics and potential use of different parts of the spectrum, and national priorities and policies.
Why is spectrum allocation done?
This basically means that spectrum allocation is done to prevent major interference and chaos in the air waves, which would serve no one at all. Imagine a four-lane road that is quite small for highway standards and that there is no regulation where different vehicles are allowed to travel in.
What is 2G 3G spectrum?
While 2G stands for second-generation wireless telephone technology, 1G networks used are analog, 2G networks are digital and 3G (third-generation) technology is used to enhance mobile phone standards. 4G technology stands to be the future standard of wireless devices.
Why are there different frequency bands in 3G UMTS?
This is because the frequency allocations are for different areas, and each frequency band definition is given a new band number for that particular band. One of the advantages of the way in which 3G UMTS frequency bands were allocated was that there was a large amount of commonality around the globe.
What are the different bands for 4G LTE?
The different 4G LTE frequency allocations or LTE frequency bands are allocated numbers. Currently the bands between 1 & 22 are for paired spectrum, i.e. FDD, and LTE bands between 33 & 41 are for unpaired spectrum, i.e. TDD. 4G LTE frequency band definitions.
How is the roll off factor of 3G UMTS determined?
This roll-off factor is determined by the Root Raised Cosine filter specified by 3GPP. This means that the total signal bandwidth increasing the skirts is 4.68 MHz. It is also worth noting that the frequency bandwidth used for the TD-SCDMA variant of 3G UMTS used in China is 1.6 MHz.
How to calculate the UARFCN for 3G UMTS?
The UARFCN can be easily calculated from the following equation or formula: UARFCN = 5 frequency in MHz The UARFCN is only able to represent channels that are centred on a multiple of 200 kHz and these do not always align with licensing in North America. Accordingly 3GPP added several special values for the common North American channels.