Down link beam forming for capacity improvement of wireless indoor communication systems

الملخص EN

In this pape, a beam forming method has been used to design sector antennas for the locally centralized radio communication $>'Stem covering one building floor.

Its ability to increase the capacity is investigated.

The results show that the capacity can be increased by about (35 %) when replacing the omnidirectional antennas by the designed antennas if the Dynamic Channel Allocation (DCA) is used.

The increase in the capacity can be as high as (500ه/ه) when Fixed Channel Allocation (FCA) is used.

This improvement really marks out the problem FCA has with the co-channel interference when using omnidirectional antennas.

The results also indicate how well the studied wireless system can coexist with similar systems located in the vicinity.

The use of the proposed antennas reduces the transmitter power and therefore improves the performance of closely located wireless networks.