Introduction to Smart Antennas - Chapter 7 ppsx

... 108 INTRODUCTION TO SMART ANTENNAS y D x = 54 .74 7 x 0 = 0 .79 4 t = 0.300 D y = 54.562 y 0 = 1.164 r = 11 .7, Si d x = 7. 500 W = 2.2 47 = 0.04 d = 7. 500 L = 2.062 f =20 x = 54 .74 7 mm 0 = 0 .79 4 mm ... beamwidths and lower sidelobes lead to lower cochannel interference. 110 INTRODUCTION TO SMART ANTENNAS -3 0-3 0 -2 0-2 0 -1 0-1 0 00 90 60 30 0 30 60...

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... Ioannides www.morganclaypool.com ISBN: 159829 176 9 paperback ISBN: 978 159829 176 6 paperback ISBN: 159829 177 7 ebook ISBN: 978 159829 177 3 ebook DOI: 10.2200/S00 079 ED1V01Y200612ANT005 A Publication in the ... series SYNTHESIS LECTURES ON ANTENNAS #5 Lecture #5 Series Editor: Constantine A. Balanis, Arizona State University First Edition 10 9 8 7 6 5 4 3 2 1 vi INTRODUCTION TO S...

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... observations become “full-rank”. The approach of MUSIC, and other subspace-based methods, is to first 82 INTRODUCTION TO SMART ANTENNAS -9 0 -7 5 -6 0 -4 5 -3 0 -1 5 0 15 30 45 60 75 90 (degrees) 0 5 10 15 20 25 30 35 MUSIC ... is to apply appropriate methods to the received signals so as to extract the region θ outoftherangeof. If noise was absent in (5 .7)...

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... Throughput Channel Bandwidth . (2.1) 20 INTRODUCTION TO SMART ANTENNAS -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 Normalized Frequency (f T) -0 .4 -0 .2 0.0 0.2 0.4 0.6 0.8 1.0 Normalized Amplitude FIGURE ... instead FIGURE2.8: Sectorized cellular network employing three sectors, each one covering 120 ◦ field of view. 8 INTRODUCTION TO SMART ANTENNA...

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... fixed to the optimum direction (toward which the signal -to- noise ratio is maximized). In this direction the maximum of the pattern is ideally toward the desired signal. 30 INTRODUCTION TO SMART ANTENNAS 0 ... 40 b (dB) 10 -7 10 -6 10 -5 10 -4 10 -3 10 -2 10 -1 1 P b MRC diversity AWGN channel L=1 L=2 L=3L=4 FIGURE 3.6: The MRC diversity technique [72 ]....

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... unit FIGURE 4.18: Reception part of a smart antenna [20]. 60 INTRODUCTION TO SMART ANTENNAS -1 80 -1 50 -1 20 -9 0 -6 0 -3 0 0 30 60 90 120 150 180 (degrees) -8 0 -6 0 -4 0 -2 0 0 Gain (dB) FIGURE 4.26: Normalized ... pattern SMART ANTENNAS 67 -1 80 -1 50 -1 20 -9 0 -6 0 -3 0 0 30 60 90 120 150 180 (degrees) -5 0 -4 0 -3...

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... stochastic gradient algorithms since the instantaneous estimate of the gradient vector is a random vector that depends on the input data 90 INTRODUCTION TO SMART ANTENNAS -9 0 -7 5 -6 0 -4 5 -3 0 -1 5 ... signal pattern shaping is to simultaneously place a beam maximum toward the signal-of-interest (SOI) and ideally nulls toward directions of interfering signals or...

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... station) space-time processing smart antennas MISO/SIMO MIMO FIGURE 8.3: Space–time processing; applications and benefits [25]. 132 INTRODUCTION TO SMART ANTENNAS is considered to be frequency-flat, the ... Nevertheless, extremely good Signal -to- Noise-ratios are required to achieve this goal. Multiple antennas on the terminal side are believed to increase the rate further...

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... adaptive beam-forming. Fig. 9.2 illustrates the functional diagram of Spotlight  . Another product by the same company is the SmartCell  . It is a targeted, sector-by- sector smart antenna ... to continual advances in the field, it is expected that the usage of smart antennas will continue to grow. COMMERCIAL AVAILABILITY OF SMART ANTENNAS 153 FIGURE 9.3: The use of standard or...

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... 164 INTRODUCTION TO SMART ANTENNAS [78 ] “Special issue on adaptive antennas, ” IEEE Trans. Antennas Propagat., vol. 24, no. 5, Sept. 1 976 . [79 ] “Special issue onadaptive ... mo- bile communications,” Vienna University of Technology, Tech. Rep., 2001. [Online]. Available: http://www.nt.tuwien.ac.at/mobile/research /smart antennas tutorial 170 INTRODUCTION TO SMART AN...

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