The development of powerful low-cost Digital Signal Processors (DSP’s), ASIC’s, and software based DSP techniques using Algorithms have made Phased Array Antenna practical for wireless cellular communication systems. Enter the email address you signed up with and well email you a reset link. 4 – Block Diagram of Adaptive Array Antenna SystemImproved S/N Ratio and Optimal Gain is achieved by this type of Antenna. They are capable to modify their radiation patterns by utilizing the wireless radio channel at both transmitter and receiver section with high precision using DSP. S. It is typically implemented in the Base Station.
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If you are looking for a book on Smart Antenna For Mobile Communication then this is a great book to read. 13. Conventional Antenna uses limited Bandwidth and hence lot of interference issues persists in the system. Increase the data speed and reduce the error
rate.
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D. 93 x 9. The antenna beam is adjusted in the desired direction by changing ON-OFF states of the switches. This is not practical.
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But companies re trying methods like dual polarization to reduce the size. 11 limited allocated spectrum
results in a limit on capacity radio propagation environment and
the mobility of users give rise to signal fading and spreading in
time, space and frequency limited battery life at the mobile device
poses power Why do We use smart antennas? 10. 1. The information in this book is based on the latest research on Smart Antenna For Mobile Communication .
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This type of technology has already found its significance in most of the wireless communication systems as special antenna arrays are used with signal processing algorithms which can easily locate and track the different wireless targets such as mobiles. Fig. The outputs of multiple antennas are combined to form a directional beam. Phased Array/Beam Smart/Multi-beam AntennaIn this type of array, there will be numerous amount of fixed beams amongst which one beam will turn on or will be steered towards the wanted signal. In my most recent undertaking concerning Smart Antenna For Mobile Communication , I found the source below to be very helpful. This book arms wireless telecom engineers with a powerful design methodology that allows them to select the smart antenna approach most suitable for a particular application.
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HOW THE ANTENNAS WORK?HOW THE ANTENNAS
WORK? 8. Now-a-days, the smart antennas have received much
attention among people in the least few years. By using polarized diversity, the above problem can be avoided to a certain point.
Another way of categorizing smart antennas is in the number of inputs and outputs that is used for the device.
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11. Basically, Phased Array Antenna or Antenna Arrays scans the environment for the clients and interference using embedded algorithms. read this article more articles that can be used for Seminars or Paper presentation or for your general electronics knowledge, take a look at our Tutorials category. This cycle repeats to dynamically shape different patterns in response to changing environments.
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This signal is fed to the control unit. It also allows wireless engineers to evaluate systems performance of a particular design and engineer smart antenna designs for optimal performance. It works by taking the advantage of the diversity effect at the transceiver of the wireless system that is the source and the destination. edu no longer supports Internet Explorer.
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Even Matrix Pencil method is commonly used in smart arrays to find the DOA. view it now These are best employed in relatively low multipath, interference limited environments, to derive greatest system benefits. ], and will also decrease the life of battery of mobiles. The phases and amplitudes of the signal exciting the elements determine the gain of the array in a certain direction.
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Fig. Several adaptive algorithms are used to focus the array beam for transmission. All these problems can be solved with the help of Smart Antennas. When multiple mitigation is needed, diversity becomes a big problem. The filters will also be helpful in providing optical beamforming so as to decrease the MMSE between the actual and wanted beam pattern that is formed. .