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  1. International Journal of Wireless Information Networks
  2. International Journal of Wireless Information Networks : Volume 22
  3. International Journal of Wireless Information Networks : Volume 22, Issue 4, December 2015
  4. Robust RF Beamforming for Millimeter Wave MIMO–OFDM Systems
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International Journal of Wireless Information Networks : Volume 24
International Journal of Wireless Information Networks : Volume 23
International Journal of Wireless Information Networks : Volume 22
International Journal of Wireless Information Networks : Volume 22, Issue 4, December 2015
Toward 5G Emerging Technologies: Selected Papers from IEEE PIMRC 2014
User Cooperation for 5G Wireless Access Networks
Techno-Economical Comparison of Dynamic DAS and Legacy Macrocellular Densification : Capacity and Cost-Efficiency Analysis of Alternative Deployment Solutions for Outdoor Service Provisioning
Robust RF Beamforming for Millimeter Wave MIMO–OFDM Systems
On the Impact of LTE-U on Wi-Fi Performance
An Efficient Multi-carrier Resource Allocation with User Discrimination Framework for 5G Wireless Systems
Density Function of the Received Signal in OFDM-based Distributed Detection Fusion System
ROC Performances of Constant False Alarm Coded Anti-collision Radar in Multi-user Environment
Evaluation of Energy Efficiency-Reconstruction Error Trade-Off in the Co-design of Compressive Sensing Techniques for Wireless Lossy Sensor Networks
Integrating RFID Transponders as Data Loggers in Wireless Sensor Nodes for Outdoor Remote Monitoring Operations
A Design of Modulator and Demodulator for a Passive UHF RFID Tag Using DTMOST Compatible with C1 G2 EPC Standard Protocol
Enhance Internet Access Ability for Ad Hoc Network with On-Demand Gateway Broadcast Strategy
International Journal of Wireless Information Networks : Volume 22, Issue 3, September 2015
International Journal of Wireless Information Networks : Volume 22, Issue 2, June 2015
International Journal of Wireless Information Networks : Volume 22, Issue 1, March 2015
International Journal of Wireless Information Networks : Volume 21
International Journal of Wireless Information Networks : Volume 20
International Journal of Wireless Information Networks : Volume 19
International Journal of Wireless Information Networks : Volume 18
International Journal of Wireless Information Networks : Volume 17
International Journal of Wireless Information Networks : Volume 16
International Journal of Wireless Information Networks : Volume 15
International Journal of Wireless Information Networks : Volume 14
International Journal of Wireless Information Networks : Volume 13
International Journal of Wireless Information Networks : Volume 12
International Journal of Wireless Information Networks : Volume 11
International Journal of Wireless Information Networks : Volume 10
International Journal of Wireless Information Networks : Volume 9
International Journal of Wireless Information Networks : Volume 8
International Journal of Wireless Information Networks : Volume 7
International Journal of Wireless Information Networks : Volume 6
International Journal of Wireless Information Networks : Volume 5
International Journal of Wireless Information Networks : Volume 4

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Robust RF Beamforming for Millimeter Wave MIMO–OFDM Systems

Content Provider Springer Nature Link
Author Ramadan, Yahia R. Ibrahim, Ahmed S. Khairy, Mohamed M.
Copyright Year 2015
Abstract In conventional multiple-input multiple-output systems, each antenna is connected to a radio-frequency (RF) chain. Due to the tiny wavelength of millimeter waves (mmWave), tens of antennas can be packed into a small area in mmWave transceivers. However, implementing an RF chain for each antenna is impractical due to the high cost and power of mixed-signal devices. In order to reduce the cost and get benefit from the antennas, an analog RF beamformer is implemented using variable gain amplifiers and analog phase shifters. In this paper, we propose a novel spatial diversity scheme for mmWave RF beamforming. The transmitter is assumed to have partial knowledge of the channel to the receiver. We formulate the spatial diversity problem as maximizing the geometric mean of the projections of the RF precoder on the transmit steering vectors and the geometric mean of the projections of the RF combiner on the receive steering vectors. To solve the optimization problem of the RF beamformers, we propose two solution algorithms. The first algorithm is based on semidefinite relaxation (SDR). Due to the high computational complexity of the SDR algorithm, we propose a simpler second algorithm, which is gradient ascent algorithm. Simulation results show that the proposed spatial diversity scheme outperforms the conventional spatial diversity schemes in case of no blockage and in case of blockage to any propagation path regardless of the number of propagation paths.
Starting Page 327
Ending Page 335
Page Count 9
File Format PDF
ISSN 10689605
Journal International Journal of Wireless Information Networks
Volume Number 22
Issue Number 4
e-ISSN 15728129
Language English
Publisher Springer US
Publisher Date 2015-09-16
Publisher Place New York
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Millimeter wave RF beamforming Spatial diversity Blockage Electrical Engineering
Content Type Text
Resource Type Article
Subject Computer Networks and Communications Electrical and Electronic Engineering Hardware and Architecture
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