1) Cluster size is inversely proportional to channel capacity,larger the cluster size the smaller the number of users.Cluster size is also inversely proportional to co-channel interference i.e higher the cluster size less is co-channel interference.When capacity of the channel is increased the co-channel interference also increases.
2) The possible solutions to increase the capacity of cellular system are:
a) Cell Sectorization
b) Cell Splitting
c) Reduction of cluster size also increases capacity per cell
d) Sharing frequency bands 3) Hexagonal cellular structure are used for because of following reasons: a) It depicts that no area remain uncovered b) Hexagonal shape can be sub divided into micro hexagonal …show more content…
5) Sectorization is used to reduce CCI by forming the sectors at 120 degree or 60 degree in the cells.In 120 degree the cell is divided into three equal parts and in 60 degree the cell is divided into six equal parts.It helps to reduce cluster size and CCI . 6) The overlaid system is one in which mobiles near base station are assigned to channels from small cluster size .It is because more number of users are nearby the base station so if cluster size is small then its capacity is more and it can handle large number of users.Also the hand off is frequent nearby the base station but away from base stations the quantity of users is very less and they can be easily satisfied with channels of large cluster size. 7)Adjacent Channel Interference (ACI) is the distortion caused by the cells of the adjacent channels. ACI is caused when two signals are transmit at same frequency in different channels.ACI can be reduced by not allocating same frequency to adjacent cells.It can also be reduced by using non linear filters at the
2) The possible solutions to increase the capacity of cellular system are:
a) Cell Sectorization
b) Cell Splitting
c) Reduction of cluster size also increases capacity per cell
d) Sharing frequency bands 3) Hexagonal cellular structure are used for because of following reasons: a) It depicts that no area remain uncovered b) Hexagonal shape can be sub divided into micro hexagonal …show more content…
5) Sectorization is used to reduce CCI by forming the sectors at 120 degree or 60 degree in the cells.In 120 degree the cell is divided into three equal parts and in 60 degree the cell is divided into six equal parts.It helps to reduce cluster size and CCI . 6) The overlaid system is one in which mobiles near base station are assigned to channels from small cluster size .It is because more number of users are nearby the base station so if cluster size is small then its capacity is more and it can handle large number of users.Also the hand off is frequent nearby the base station but away from base stations the quantity of users is very less and they can be easily satisfied with channels of large cluster size. 7)Adjacent Channel Interference (ACI) is the distortion caused by the cells of the adjacent channels. ACI is caused when two signals are transmit at same frequency in different channels.ACI can be reduced by not allocating same frequency to adjacent cells.It can also be reduced by using non linear filters at the