The most common multiple access schemes currently employed are frequency division multiple access (FDMA), time-division multiple access (TDMA) and code-division multiple access (CDMA). The ability to distinguish between users in a communications system is essential. Smart antennas –spatial diversity for improved spectral efficiency analyse the regulatory issues involved in smart antennas to inform our regulatory stance.identify the areas and applications for which smart antennas will most likely be first deployed. identify the key obstacles to the development of widely deployed smart antenna systems, and understand the breakthroughs needed to overcome these.Through intelligent control of the transmission and reception of signals, capacity and coverage in mobile wireless networks can be significantly improved. Smart antenna technology has the potential to significantly increase the efficient use of the spectrum in wireless communication applications in comparison to the existing methods in use.
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