Smart Antenna for Mobile Communication
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چکیده
smart antennas are one of the most hottest topics in mobile communication. The smart antenna technology can significantly improves wireless system performance and economics for a range of potential users. It enable operators of PC’s cellular and wireless local loop networks to realize significant increase in signal quality, network capacity and coverage. In truth it is not the antenna that is smart but the antenna system are smart. Firstly we present different types of smart antenna systems and features and benefits of smart antenna systems, next we deal with the basic problem of wireless transmission such as co-channel interference multi path propagation , fading and signal to interference ratio. The advantages of smart antennas over `conventional antennas i.e Extension of range increasing capacity, reduced inter channel interference are also presented in this paper. Then we have presented how the smart antennas are useful for TDMA and CDMA technologies. Lastly weight determination using algorithms and future developments such as MIMO systems concludes our paper.
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