Works Published in 2008
Displaying works 21 - 40 of 303 in total
Sorted by most recent date added to the index first, which may not be the same as publication date order.
2008 conference paper
Parallelizing Mudflap using Thread-Level Speculation on a Chip Multiprocessor
Proc. of the 2008 Workshop on Parallel Execution of Sequential Programs on Multicore Architectures, 72–80.
Event: Citeseer
Source: ORCID
Added: August 18, 2021
2008 chapter
Overview of Networked Control Systems
In F.-Y. Wang & D. Liu (Eds.), Networked Control Systems: Theory and Applications.
Ed(s): F. Wang & D. Liu
TL;DR:
The history of NCS, different advantages of having such systems, and the insight to different challenges which come with building efficient, stable and secure NCS are given.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: NC State University Libraries
Added: August 14, 2021
2008 journal article
Searchback Algorithms for TOA Estimation in Non-coherent Low-rate IR-UWB Systems
Wireless Personal Communications, 48(4), 585–603.
author keywords: Ranging; Non-coherent; Sub-Nyquist sampling; UWB; First path detection; Energy detector
TL;DR:
Simulation results show that JBSF typically performs better than SBS if the inter-cluster delay parameter (K) is not selected appropriately for SBS, and even at sampling rates much smaller than the Nyquist rate, ranging accuracies can be obtained using a non-coherent UWB receiver.
(via Semantic Scholar)
Sources: Crossref, NC State University Libraries
Added: January 21, 2021
2008 journal article
Development and prospects of nitride materials and devices with nonpolar surfaces
Physica Status Solidi (b), 245(6), 1011–1025.
Source: Crossref
Added: January 5, 2021
2008 conference paper
Using higher order cyclostationarity to identify space-time block codes
GLOBECOM - IEEE Global Telecommunications Conference, 3370–3374.
Contributors: M. Deyoung*, R. Heath* & B. Evans *
TL;DR:
A cyclostationarity-based statistical test to detect space-time block codes, focusing on the two transmitter Alamouti space- time block code (STBC) using fourth order cyclic frequencies is proposed.
(via Semantic Scholar)
citeseerx.ist.psu.edu (repository)
Source: ORCID
Added: September 11, 2020
2008 journal article
Uplink SDMA with limited feedback: Throughput scaling
Eurasip Journal on Advances in Signal Processing, 2008.
Contributors: K. Huang *, R. Heath Jr. & J. Andrews *
TL;DR:
The analysis of throughput scaling suggests guidelines for scheduling in uplink SDMA, including the criterion of minimum quantization errors for the high SNR regime and maximum channel power for the lowSNR regime.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Shannon capacity and symbol error rate of space-time block codes in MIMO rayleigh channels with channel estimation error
IEEE Transactions on Wireless Communications, 7(1), 324–333.
Contributors: K. Ahn*, R. Heath Jr. & H. Baik*
author keywords: channel estimation error; multiple-input multiple-output (MIMO); Shannon capacity; space-time block coding (STBC); symbol error rate (SER)
TL;DR:
This paper analyzes the impact of channel estimation error on the ergodic capacity and symbol error rate (SER) for space-time block coded multiple-input multiple-output (MIMO) systems and derives a closed-form capacity expression over MIMO Rayleigh channels withChannel estimation error.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Spatial interference cancellation for mobile ad hoc networks: Perfect CSI
GLOBECOM - IEEE Global Telecommunications Conference, 666–670.
Contributors: K. Huang *, J. Andrews *, R. Heath Jr., D. Guo * & R. Berry *
TL;DR:
This paper focuses on spatial interference cancellation with perfect channel state information (CSI), and analyzes the corresponding network capacity, which is defined as the maximum transmitting node density under constraints on outage and the signal-to-interference-plus-noise ratio.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 journal article
Sizing up MIMO arrays
IEEE Vehicular Technology Magazine, 3(4), 31–38.
Contributors: R. Bhagavatula*, R. Heath* , S. Vishwanath * & A. Forenza
TL;DR:
The proposed methodology by applying it to wireless deployment in aircraft, to reduce expenditure associated with the installation and maintenance of wires for seatback entertainment, can be easily supported by MIMO systems.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
SSIM-Optimal linear image restoration
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 765–768.
Contributors: S. Channappayya *, A. Bovik *, C. Caramanis* & R. Heath Jr.
author keywords: image restoration
TL;DR:
It is shown using these examples that optimizing equalizers for the SSIM index does indeed result in higher perceptual image quality compared to equalizers optimized for the ubiquitous mean squared error (MSE).
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Throughput/Delay measurements of limited feedback beamforming in indoor wireless networks
GLOBECOM - IEEE Global Telecommunications Conference, 4593–4598.
Contributors: R. Daniels*, K. Mandke*, K. Truong *, S. Nettles* & R. Heath Jr.
TL;DR:
This paper investigates the tradeoff between throughput and feedback delay of limited feedback beamforming in indoor wireless channels with a practical MIMO-OFDM prototype and evaluates the performance of limited Feedback beamforming under feedback delay and confirms the accuracy of the analytical results.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Switching between antenna selection and spatial multiplexing in the nonregenerative MIMO relay channel
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1469–1473.
Contributors: S. Peters* & R. Heath Jr.
TL;DR:
In this paper, the use of pre-existing adaptation techniques is shown to be inapplicable to the linear MIMO relay channel, motivating the derivation of new techniques.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Single-user MIMO vs. multiuser MIMO in the broadcast channel with CSIT constraints
46th Annual Allerton Conference on Communication, Control, and Computing, 309–314.
Contributors: J. Zhang *, J. Andrews * & R. Heath Jr.
TL;DR:
Fundamental limits on adaptive multiple-input multiple-output (MIMO) transmission with imperfect channel state information at the transmitter (CSIT) are considered and it is shown that single-user MIMO is robust to imperfect CSIT while multiuser MIMo loses spatial multiplexing gain in proportion to delay and inverse with channel quantization codebook size.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Spatial interference cancelation for mobile Ad hoc networks: Imperfect CSI
Conference Record - Asilomar Conference on Signals, Systems and Computers, 131–135.
Contributors: K. Huang *, R. Heath Jr., J. Andrews *, D. Guo * & R. Berry *
TL;DR:
Simulation results show that spatial interference cancelation increases transmission capacity by an order of magnitude or more despite CSI inaccuracy, and increasing the length of training sequences with the inverse of the decreasing target outage probability achieves the same network-capacity scaling laws as for perfect CSI.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 journal article
Space-time block codes with limited feedback using antenna grouping
IEICE Transactions on Communications, E91-B(10), 3387–3390.
Contributors: C. Chae *, S. Shim* & R. Heath Jr.
author keywords: space-time block code; full-diversity full-rate system; antenna selection; antenna grouping
TL;DR:
An antenna grouping method that improves the error rate performance of space-time codes in a wide range of mobility environments by requiring only two bits of feedback information to achieve better link performance and full rate for a certain four transmit antenna system.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Rate bounds for MIMO relay channels
Journal of Communications and Networks, 10(2), 194–203. http://www.scopus.com/inward/record.url?eid=2-s2.0-47249142481&partnerID=MN8TOARS
Contributors: C. Lo, S. Vishwanath & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2008 conference paper
Relay subset selection in wireless networks using partial decode-and-forward transmission
IEEE Vehicular Technology Conference, 2395–2399.
Contributors: C. Lo*, S. Vishwanath * & R. Heath Jr.
TL;DR:
This paper considers the problem of selecting a set of relay nodes to assist a transmitting node in a two-hop wireless network and proposed proximity-based relay selection algorithms offer good performance in terms of the expected achieved rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Rate bounds on SSIM index of quantized image DCT coefficients
Data Compression Conference Proceedings, 352–361.
Contributors: S. Channappayya *, A. Bovik *, R. Heath Jr. & C. Caramanis*
TL;DR:
Borders on the structural similarity (SSIM) index are derived as a function of quantization rate for fixed-rate uniform quantization of image discrete cosine transform (DCT) coefficients under the high rate assumption.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Non-redundant precoding-based blind and semi-blind channel estimation for MIMO block transmission with a cyclic prefix
IEEE Transactions on Signal Processing, 56(6), 2509–2523.
Contributors: C. Shin *, R. Heath Jr. & E. Powers*
author keywords: blind and semi-blind channel estimation; block transmission; cyclic prefix; multiple-input-multiple-output (MIMO); precoding
TL;DR:
This paper presents a framework for blind channel estimation based on a general non-redundant precoding that is robust against overestimates of a true MIMO channel order, and derives a simplified precoder that is optimized in the sense of minimizing the impact of unknown additive noise.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Rate bounds on SSIM index of quantized images
IEEE Transactions on Image Processing, 17(9), 1624–1639.
Contributors: S. Channappayya *, A. Bovik * & R. Heath Jr.
MeSH headings : Algorithms; Data Compression / methods; Image Enhancement / methods; Image Interpretation, Computer-Assisted / methods; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted
TL;DR:
Borders on the structural similarity (SSIM) index are derived as a function of quantization rate for fixed-rate uniform quantization of image discrete cosine transform (DCT) coefficients under the high-rate assumption.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
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