Introduction to Smart Antennas - Chapter 10 pdf

... http://danube.ee.washington.edu/downloadable/ hliu/survey tong2 .pdf doi :10. 1016/016 5-1 684(96)0001 3-8 [204] L. Tong and S. Perreau, “Multichannel blind identification: From subspace to max- imum likelihood ... antenna arrays using cou- pling matrix,” Microw. Opt. Technol. Lett., vol. 28, no. 4, pp. 231–237, Feb. 2001. doi :10. 1002 /109 8-2 760(20 0102 20)28:4<231::AID-MOP100...

Ngày tải lên: 13/08/2014, 02:21

... 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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... referred to as Mobile Ad hoc NETwork (MANET), and it is beginning to emerge using Bluetooth TM technology. Bluetooth TM is a short-range, low-power radio link (10 100 m) that allows two or more Bluetooth TM devices to ... reliable and robust high-speed high-data-rate transmission. The purpose of this book is to provide the reader a broad view of the system aspects of smart antennas...

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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 ANTENNAS...

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... toward the desired signal. 30 INTRODUCTION TO SMART ANTENNAS 0 5 10 15 20 25 30 35 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: ... These FIGURE 3.1: Omnidirectional antennas and coverage patterns [4]. ANTENNA ARRAYS AND DIVERSITY TECHNIQUES 27 0 5 10 15 20 25 30 b (dB) 10...

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... 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 0 -2 0 -1 0 0 10 Gain (dB) With mutual coupling No mutual coupling FIGURE 4.30: Comparison of array factors ... unit FIGURE 4.18: Reception part of a smart antenna [20]. 60 INTRODUCTION TO SMART ANTENNAS -1 80 -1 50 -1 20 -9 0...

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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 ... vector wavenumber of the incident plane from the ith narrowband source and D is the vector displacement between the two subarrays. If we a...

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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 ... 90 (degrees) -6 0 -5 0 -4 0 -3 0 -2 0 -1 0 0 10 20 30 Beampattern (dB) Adaptive beamforming Classical beamforming SOISNOI SNOI FIGURE 6.1: Class...

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... 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 90 dB E-plane H-plane FIGURE 7.3: Single element ... power. However, with smart 122 INTRODUCTION TO SMART ANTENNAS 0 5 10 15 20 25 0 2 4 6 8 Load (# packets) Delay (# packets) Train - 6% Train - 1...

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... intrinsic advantages 142 INTRODUCTION TO SMART ANTENNAS 1 10 100 1 10 5 Range (Km) 90% Single-User Data Rate (Mbps) P T =10W B =5MHz M-antenna transmit diversity at base-station Single antenna ... 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 considere...

Ngày tải lên: 13/08/2014, 02:21