Search results for: Corbett Rowell

Items from 1 to 16 out of 16 results

article

Distributed Spatial Multiplexing Systems With Hardware Impairments and Imperfect Channel Estimation Under Rank-1 Rician Fading Channels

Nikolaos I. Miridakis, Theodoros A. Tsiftsis, Corbett Rowell

IEEE Transactions on Vehicular Technology > 2017 > 66 > 6 > 5122 - 5133

The performance of a multiuser communication system with single-antenna transmitting terminals and a multiantenna base-station receiver is analytically investigated. The system operates under independent and nonidentically distributed rank-1 Rician fading channels with imperfect channel estimation and residual hardware impairments (compensation algorithms are assumed, which mitigate the main impairments)...

article

Achievable Channel Cutoff Rate and Bandwidth Efficiency in Indoor Wireless Environments

Indrakshi Dey, Theodoros A. Tsiftsis, Corbett Rowell

IEEE Transactions on Vehicular Technology > 2016 > 65 > 12 > 10074 - 10079

In this paper, analytical expressions for the channel capacity, channel cutoff rate, and achievable bandwidth efficiency associated with

$M$

-ary signaling and Joint Fading Two-path Shadowing (JFTS) fading/shadowing channel model that characterize mobility-constrained indoor propagation scenarios are derived. Expressions for the bandwidth efficiency of a JFTS fading channel involve infinite-series...

chapter

Antenna beamforming for energy harvesting in cognitive radio networks

Huidong Liu, Jin Chen, Guoru Ding, Theodoros A. Tsiftsis, more

2016 IEEE MTT-S International Wireless Symposium (IWS) > 1 - 4

2016 IEEE MTT-S International Wireless Symposium (IWS)

In this paper, a cooperative cognitive radio network (CRN) with energy harvesting capabilities of its secondary users is considered. Specifically, cooperative spectrum sensing and multi-antenna beamforming are employed to improve the sensing performance and the energy transfer efficiency, respectively. In our approach, a homogeneous CRN scenario is studied where the optimal sensing probability of...

article

Guest Editorial

C. Patrick Yue, Corbett Rowell

IEEE Transactions on Microwave Theory and Techniques > 2016 > 64 > 3 > 673 - 674

The papers in this special section were presented at the IEEE International Wireless Symposium (IWS), which was held in Shenzhen, China, from March 30th to April 1, 2015.

chapter

Practical Large Scale Antenna Systems for 5G cellular networks

Corbett Rowell, Shuangfeng Han

2015 IEEE International Wireless Symposium (IWS 2015) > 1 - 4

2015 IEEE International Wireless Symposium (IWS)

In order to increase capacity and reduce power consumption for future cellular networks, new cellular architectures and radio access schemes will be required. Two important technologies for future 5G and 6G networks include Cloud-Radio Access Networks (C-RAN) and Large Scale Antenna Systems (LSAS) with hundred's of low power radios to increase the cell capacity with multi-user MIMO multiplexing and...

article

Large-scale antenna systems with hybrid analog and digital beamforming for millimeter wave 5G

Shuangfeng Han, Chih-lin I, Zhikun Xu, Corbett Rowell

IEEE Communications Magazine > 2015 > 53 > 1 > 186 - 194

With the severe spectrum shortage in conventional cellular bands, large-scale antenna systems in the mmWave bands can potentially help to meet the anticipated demands of mobile traffic in the 5G era. There are many challenging issues, however, regarding the implementation of digital beamforming in large-scale antenna systems: complexity, energy consumption, and cost. In a practical large-scale antenna...

chapter

Large scale antenna system with hybrid digital and analog beamforming structure

Shuangfeng Han, Chih Lin I, Corbett Rowell, Zhikun Xu, more

2014 IEEE International Conference on Communications Workshops (ICC) > 842 - 847

2014 ICC - 2014 IEEE International Conference on Communication Workshop (ICC)

Large scale antenna systems (LSAS) are expected to significantly enhance the energy efficiency (EE) and spectrum efficiency (SE) of wireless communication systems. However, there are many open issues regarding the implementation of digital beamforming (BF) structures: calibration, complexity, and cost. In a practical LSAS deployment, hybrid digital and analog BF structures with active antennas can...

chapter

Green RF technologies for 5G networks

Corbett Rowell, Shuangfeng Han, Zhikun Xu, I Chih Lin

2014 IEEE International Wireless Symposium (IWS 2014) > 1 - 4

2014 IEEE International Wireless Symposium (IWS)

By focusing on the co-design of spectral efficiency and energy efficiency, a new network architecture with both higher capacity and lower power consumption than existing networks is proposed. Through the use of a new network topology, green RF techniques using large scale antenna systems and full duplex radio are proposed as a means to reduce network energy consumption while increasing network capacity...

article

Toward green and soft: a 5G perspective

Chih-Lin I, Corbett Rowell, Shuangfeng Han, Zhikun Xu, more

IEEE Communications Magazine > 2014 > 52 > 2 > 66 - 73

As the deployment and commercial operation of 4G systems are speeding up, technologists worldwide have begun searching for next generation wireless solutions to meet the anticipated demands in the 2020 era given the explosive growth of mobile Internet. This article presents our perspective of the 5G technologies with two major themes: green and soft. By rethinking the Shannon theorem and traditional...

chapter

Electrically small RF coil arrays for medical & wireless power applications

Chi-Lun Mak, Wan-Ming Lau, Corbett Rowell

2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO) > 1 - 3

2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)

This paper analyzes the effect of close proximity for coil arrays and measures the S₂₁ mutual coupling, resonant frequency, and quality factor (Q) of arrays with 2, 4, & 8 coils. It is demonstrated that for vertically separated coils, the mutual coupling effect decays asymptotically as a function of separation distance; whereas for horizontally separated coils, there are two mutual coupling minima...

chapter

A low-cost dual-polarized wideband antenna

Angus C. K. Mak, Corbett Rowell

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI) > 1478 - 1479

2013 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

In this paper, a low-cost dual-polarized wideband base station antenna is presented. The antenna element can cover the frequency band from 1900 to 2700MHz. The results in this antenna design demonstrate that it is more cost-effective and can simplify the manufacturing process. The antenna consists of only one double-size PCB and two single-layer PCBs. It shows that the antenna element can provide...

chapter

Band-stop filter effect of multiple slots in mobile phone antennas

Corbett Rowell, Edmund Y. Lam

Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation > 1 - 2

2012 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting

A slot placed between the feed and the ground connections of a single shorted microstrip antenna in a two antenna system can produce a band-stop filter effect in one of the frequency bands where both antennas radiate at the same frequency. This band-stop filter effect creates a large group delay at a particular frequency anti-resonance and depends on the slot parameters and the feed/ground placement...

chapter

Tuning the band-stop filter effect in mobile phone antennas

Corbett Rowell, Edmund Y. Lam

Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation > 1 - 2

2012 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting

A slot placed between the feed and the ground connections of a single shorted microstrip antenna (PIFA) in a two antenna system can produce a band-stop filter effect in one of the frequency bands where both antennas radiate at the same frequency, but have very high isolation. The slot forms a band-stop filter, creating a large group delay at certain frequencies at a particular anti-resonance frequency...

article

Mobile-Phone Antenna Design

Corbett Rowell, Edmund Y. Lam

IEEE Antennas and Propagation Magazine > 2012 > 54 > 4 > 14 - 34

This paper is a survey of internal antennas in mobile phones from 1997 to 2010. It covers almost 60 GSM and 3G handsets, ranging from the first GSM handset with an internal antenna to the current Nokia, Sony-Ericsson, Motorola, and Apple handsets. The paper discusses different types of mobile-phone antennas, feeding structures, active antennas, isolation, and antenna loading techniques. This paper...

article

Multiple Frequency Band and High Isolation Mobile Device Antennas Using a Capacitive Slot

Corbett Rowell, Edmund Y. Lam

IEEE Transactions on Antennas and Propagation > 2012 > 60 > 8 > 3576 - 3582

The performance characteristics of the capacitive slot, or a slot placed between the feed and ground connections, in a planar inverted-F antenna (PIFA) are comprehensively analyzed. The PIFA capacitive slot behavior is measured inside a two antenna system within a mobile phone where the first antenna is a multiple band PIFA and the second antenna is a higher frequency band PIFA directly overlapping...

chapter

A novel antenna isolation method for mobile phone antennas

Corbett Rowell, Edmund Y. Lam

2011 IEEE International Symposium on Antennas and Propagation (APSURSI) > 1922 - 1925

2011 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting

The behavior of a two element antenna system within a mobile phone where one antenna has a particular slot configuration, designed to reduce the mutual coupling of the two antennas at a particular frequency corresponding to the length of the slot and the ground and feed placement, is analyzed and measured. This particular set of antenna geometries can create a large group delay at certain frequencies,...

Filter options

Publication date

Set your own date range

Publication type

book (9)
article (7)

Keywords

ANTENNA MEASUREMENTS (5)
TRANSCEIVERS (5)
ARRAY SIGNAL PROCESSING (3)
LSAS (3)
SLOT ANTENNAS (3)
WIRELESS COMMUNICATION (3)
ANTENNA ARRAYS (2)
ANTENNA FEEDS (2)
ANTENNA RADIATION PATTERNS (2)
ANTENNAS (2)
BASE STATIONS (2)
C-RAN (2)
CHANNEL ESTIMATION (2)
ENERGY EFFICIENCY (2)
ENERGY EFFICIENCY (EE) (2)
GEOMETRY (2)
GREEN PRODUCTS (2)
GREEN RF (2)
MICROSTRIP ANTENNAS (2)
MOBILE ANTENNAS (2)
MOBILE COMMUNICATION (2)
MUTUAL COUPLING (2)
RADIO FREQUENCY (2)
RESONANT FREQUENCY (2)
SPECTRAL EFFICIENCY (SE) (2)
3G (1)
4G (1)
ACTIVE ANTENNA (1)
ANALOG BEAMFORMING (1)
ANTENNA CALIBRATION (1)
ANTENNA EFFICIENCY (1)
ANTENNA THEORY (1)
ARRAYS (1)
BANDSTOP FILTERS (1)
BANDWIDTH (1)
BANDWIDTH EFFICIENCY (1)
CALIBRATION (1)
CAPACITORS (1)
CAPACITY (1)
CHANNEL CAPACITY (1)
CHANNEL CUT-OFF RATE (1)
CHANNEL MODELS (1)
COGNITIVE RADIO (1)
COGNITIVE RADIO NETWORKS (1)
COILS (1)
COMPUTER ARCHITECTURE (1)
COOPERATIVE SPECTRUM SENSING (1)
DELAY (1)
DIGITAL BEAMFORMING (1)
DOWNLINK (1)
ENERGY BEAM-FORMING (1)
ENERGY COOPERATION (1)
ENERGY HARVESTING (1)
FULL DUPLEX (1)
GAIN (1)
GSM (1)
HARDWARE (1)
HARDWARE IMPAIRMENTS (1)
HYBRID BEAMFORMING (1)
IMPERFECT CHANNEL ESTIMATION (1)
INTERNAL ANTENNA (1)
INVERTED-F ANTENNAS (1)
ISOLATION TECHNOLOGY (1)
JOINT FADING TWO-PATH SHADOWING (JFTS) (1)
LAND MOBILE RADIO CELLULAR SYSTEMS (1)
LAND MOBILE RADIO EQUIPMENT (1)
LAYOUT (1)
MAGNETIC RESONANCE IMAGING (1)
MANUFACTURING (1)
MASSIVE MULTIPLE-INPUT–MULTIPLE-OUTPUT (MIMO) (1)
MATCHING NETWORKS (1)
MEETINGS (1)
MICROSTRIP (1)
MICROWAVE COMMUNICATION (1)
MILLIMETER-WAVE (MMWAVE) COMMUNICATIONS (1)
MOBILE COMPUTING (1)
MOBILE PHONE (1)
MRI (1)
MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) SYSTEMS (1)
MULTIPLEXING (1)
NEXT GENERATION NETWORKING (1)
NFC (1)
PATCH ANTENNAS (1)
PIFA (1)
RECEIVERS (1)
RF COILS (1)
RICIAN CHANNELS (1)
RICIAN FADING (1)
SAR (1)
SCATTERING PARAMETERS (1)
SEA MEASUREMENTS (1)
SENSORS (1)
SHADOW MAPPING (1)
SIGNAL TO NOISE RATIO (1)
SPARSE ARRAY (1)
SPATIAL MULTIPLEXING (1)
SPECIAL ISSUES AND SECTIONS (1)
SPECTRUM EFFICIENCY (1)
SUCCESSIVE INTERFERENCE CANCELLATION (SIC) (1)
TELEPHONE SETS (1)
more

INFONA - science communication portal

Search results for: Corbett Rowell

Distributed Spatial Multiplexing Systems With Hardware Impairments and Imperfect Channel Estimation Under Rank-1 Rician Fading Channels

Achievable Channel Cutoff Rate and Bandwidth Efficiency in Indoor Wireless Environments

Antenna beamforming for energy harvesting in cognitive radio networks

Guest Editorial

Practical Large Scale Antenna Systems for 5G cellular networks

Large-scale antenna systems with hybrid analog and digital beamforming for millimeter wave 5G

Large scale antenna system with hybrid digital and analog beamforming structure

Green RF technologies for 5G networks

Toward green and soft: a 5G perspective

Electrically small RF coil arrays for medical & wireless power applications

A low-cost dual-polarized wideband antenna

Band-stop filter effect of multiple slots in mobile phone antennas

Tuning the band-stop filter effect in mobile phone antennas

Mobile-Phone Antenna Design

Multiple Frequency Band and High Isolation Mobile Device Antennas Using a Capacitive Slot

A novel antenna isolation method for mobile phone antennas

Filter options

Publication date

Publication type

Keywords

Journal

INFONA - science communication portal

Search results for: Corbett Rowell

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Publication type

Keywords

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options