Frequency Hopping ;

Figure : Frequency-hopping
Frequency Hopping is sequential change of carrier frequency on the radio link between BS and MS.
1)Frequency Hopping is be used to improve the quality of the network.
2)Frequency Hopping is also used to increase the capacity of the Network thereby reducing the number of sites required for CAPACITY.
The way it works
1)Every burst is transmitted on a different different frequency
2)Both mobile and base station follow the same hopping sequence.
Types of Frequency Hopping
1)Base Band Frequency Hopping
2)synthesis Frequency Hopping
Hopping Parameters
1)Mobile Allocation (MA): Set of frequencies the mobile is allowed to hop over. MA will receives 0-63Â frequencies at the same time . Eg:- If the operator has frequencies from 1 -32, then he can use 1-15 for BCCH and 17-32 for hopping ( MA).
2)Hopping Sequence Number (HSN): Determines the hopping order used in the cell. It arrange the 64 types of frequency in the order whatever receive from MA.
3)Mobile Allocation Index Offset (MAIO): Determines inside the hopping sequence ,in which frequency the mobile starts to transmit on.
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