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3,040
A Transmission Control Scheme for Media Access in Sensor Networks
, 2001
"... We study the problem of media access control in the novel regime of sensor networks, where unique application behavior and tight constraints in computation power, storage, energy resources, and radio technology have shaped this design space to be very different from that found in traditional mobile ..."
Abstract
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Cited by 481 (11 self)
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computing regime. Media access control in sensor networks must not only be energy efficient but should also allow fair bandwidth allocation to the infrastructure for all nodes in a multihop network. We propose an adaptive rate control mechanism aiming to support these two goals and find that such a scheme
Five misunderstandings about case-study research
- Qualitative Inquiry
, 2006
"... When I first became interested in in-depth case-study research, I was trying to understand how power and rationality shape each other and form the urban environments in which we live (Flyvbjerg, 1998). It was clear to me that in order to understand a complex issue like this, in-depth case-study rese ..."
Abstract
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Cited by 556 (2 self)
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When I first became interested in in-depth case-study research, I was trying to understand how power and rationality shape each other and form the urban environments in which we live (Flyvbjerg, 1998). It was clear to me that in order to understand a complex issue like this, in-depth case
Multiuser OFDM with Adaptive Subcarrier, Bit, and Power Allocation
- IEEE JOURNAL ON SELECTED AREAS OF COMMUNICATIONS
, 1999
"... Multiuser orthogonal frequency division multiplexing (OFDM) with adaptive multiuser subcarrier allocation and adaptive modulation is considered. Assuming knowledge of the instantaneous channel gains for all users, we propose a multiuser OFDM subcarrier, bit, and power allocation algorithm to minimiz ..."
Abstract
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Cited by 360 (3 self)
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allocation schemes. We have also quantified the improvement in terms of the overall required transmit power, the bit-error rate (BER), or the area of coverage for a given outage probability.
Channel Assignment Schemes for Cellular Mobile Telecommunication Systems
- IEEE Personal Communications
, 1996
"... This paper provides a detailed discussion of wireless resource and channel allocation schemes. We provide a survey of a large number of published papers in the area of fixed, dynamic and hybrid allocation schemes and compare their trade-offs in terms of complexity and performance. We also investigat ..."
Abstract
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Cited by 392 (1 self)
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This paper provides a detailed discussion of wireless resource and channel allocation schemes. We provide a survey of a large number of published papers in the area of fixed, dynamic and hybrid allocation schemes and compare their trade-offs in terms of complexity and performance. We also
The Determinants of Credit Spread Changes.
- Journal of Finance
, 2001
"... ABSTRACT Using dealer's quotes and transactions prices on straight industrial bonds, we investigate the determinants of credit spread changes. Variables that should in theory determine credit spread changes have rather limited explanatory power. Further, the residuals from this regression are ..."
Abstract
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Cited by 422 (2 self)
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ABSTRACT Using dealer's quotes and transactions prices on straight industrial bonds, we investigate the determinants of credit spread changes. Variables that should in theory determine credit spread changes have rather limited explanatory power. Further, the residuals from this regression
The price of stability for network design with fair cost allocation
- In Proceedings of the 45th Annual Symposium on Foundations of Computer Science (FOCS
, 2004
"... Abstract. Network design is a fundamental problem for which it is important to understand the effects of strategic behavior. Given a collection of self-interested agents who want to form a network connecting certain endpoints, the set of stable solutions — the Nash equilibria — may look quite differ ..."
Abstract
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Cited by 281 (30 self)
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that can be proposed from which no user will defect. We consider the price of stability for network design with respect to one of the most widely-studied protocols for network cost allocation, in which the cost of each edge is divided equally between users whose connections make use of it; this fair
Optimum power allocation in cooperative networks
- Proceedings of the Postgraduate Research Conference in Electronics, Photonics, Communications and Networks, and Computing Science
, 2005
"... Abstract — Cooperation among network users provides trans-mit diversity in cases where wireless transmitters, due to size and power limitation, cannot support multiple antennas. We consider cooperation between M users, where each user achieves space-time diversity by using other users ’ antennas as ..."
Abstract
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Cited by 8 (0 self)
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using transparent relaying. It will be shown that the proposed allocation scheme significantly outperforms the equal power allocation scheme, e.g., by up to 7 dB at a bit error rate of 10−3. The results presented here may serve as bounds for the performance assessment of sub-optimal (but practical
Transmit Power Allocation for BER Performance Improvement in Multicarrier Systems
- IEEE Transactions on Communications
, 2004
"... Abstract—In a multicarrier system, transmit power allocation over different subchannels is an effective means of improving the performance. We develop the optimal transmit power allocation scheme to improve bit-error rate (BER) performance in a mul-ticarrier system with diversity reception. A simple ..."
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Cited by 14 (0 self)
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simple suboptimal scheme is also derived from the optimal one, and an asymp-totic case referred to as the equal-signal-to-noise ratio scheme is discussed. Numerical results show that the optimal and sub-optimal power allocation schemes significantly outperform the equal power allocation scheme
UNEQUAL POWER ALLOCATION FOR JPEG TRANSMISSION OVER MIMO SYSTEMS
"... With the introduction of multiple transmit and receive antennas in the next generation wireless standards, realtime image and video communication is expected to become more common. New joint transmission and coding schemes are expected to be developed combining advantages of multiple antenna systems ..."
Abstract
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Cited by 9 (0 self)
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are transmitted simultaneously from different transmit antennas using unequal transmit power, with a constraint on the total transmit power during any symbol period. Results show that our unequal power allocation scheme provides significant image quality improvement as compared to different equal power
Transmit power allocation for successive interference cancellation in multicode MIMO systems
- Proc. IEEE ICC’2005, Seoul, May 2005. ... γ0 h (I) n,MI ,0 ... γ1h (I) n,MI ,1 ... γ L−1 h (I) n,M I ,L−1 ⎞ . (41) ⎟ ⎠ 1-4244-0357-X/06/$20.00 © 2006 IEEE This
"... AbstractMultiple-input multiple-output (MIMO) system with multicode transmission can provide high speed data services by transmitting independent parallel substreams from multiple antennas and through multicode channelization. In this paper, we first introduce an iterative two-stage successive inter ..."
Abstract
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Cited by 7 (0 self)
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-to-interference-plus-noise ratio (SINR) become balanced for all data substreams. Numerical results show that the proposed transmit power allocation schemes for the two-stage SIC significantly outperform the equal power allocation scheme. I.
Results 1 - 10
of
3,040
