Range-Coverage Extension Using Smart Antennas in Mobile Communications Systems


The growing demand for wireless communications services is constantly increasing the need for better coverage and quality service. Smart antennas employ collection of individual elements in the form of an array, so, they give rise to narrow beam with increased gain when compared to conventional antennas using the same power. The array gain is the average increase in signal power at the receiver due to a combination of the signals received at all antenna elements. The gain provided by adaptive antenna array is proved to provide an extension in a communication range that depends on the number of array elements. The simulation had done by using power exponent radio wave propagation model shows that the gain provided by smart antennas can extend the range of a cell to cover a larger area and more users than would be possible with omnidirectional or sector antennas. The increase in gain leads to employ fewer base stations to cover a given area.