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Media-specific rate allocation in heterogeneous wireless networks

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Combinatorial algorithms for wireless information flow

Christina Fragouli, Aurore Amaudruz

A long-standing open question in information theory is to characterize the unicast capacity of a wireless relay network. The difficulty arises due to the complex signal interactions induced in the network, since the wireless channel inherently broadcasts t ...

2009

Forward Error Correction for Multipath Media Streaming

Pascal Frossard, Aleksandar Jovanovic, Dan Jurca

We address the problem of joint optimal rate allocation and scheduling between media source rate and error protection rate in scalable streaming applications over lossy multipath networks. Starting from a distortion representation of the received media inf ...

Institute of Electrical and Electronics Engineers2009

Interference Alignment at Finite SNR: General Message Sets

Michael Christoph Gastpar

Interference alignment has proven to be a powerful tool in characterizing the high SNR behavior of wireless networks. Using this technique, Cadambe and Jafar showed that the sum degrees-of-freedom for the K-user interference channel is K/2 rather than 1 as ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Approximate Capacity of a Class of Gaussian Relay-Interference Networks

Suhas Diggavi

In this paper we study the Gaussian relay-interference network, in which relay (helper) nodes are to facilitate competing information flows over a wireless network. We examine this problem for certain regimes of channel values, when one of the cross-links ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Optimal Multiband Joint Detection for Spectrum Sensing in Cognitive Radio Networks

Ali H. Sayed

Spectrum sensing is an essential functionality that enables cognitive radios to detect spectral holes and to opportunistically use under-utilized frequency bands without causing harmful interference to legacy (primary) networks. In this paper, a novel wide ...

Institute of Electrical and Electronics Engineers2009

On selecting the best transmission mode for WiFi devices

The design of efficient IEEE 802.11 physical (PHY) rate adaptation algorithms is a challenging research topic and usually the issues surrounding their implementations on real 802.11 devices are not disclosed. In this paper, we identify and evaluate the key ...

2009

On Noise Insertion Strategies for Wireless Network Secrecy

Emre Telatar, Suhas Diggavi, Etienne Perron

We provide lower and upper bounds on the optimal rate for reliable and secret transmission of a message from one node to another in an arbitrary wireless network with deterministic signal interaction. Certain relay nodes are allowed to insert noise into th ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Security and Cooperation in Wireless Networks

Jean-Pierre Hubaux, Levente Buttyan

According to most technology pundits, progress in wireless and sensor networks will lead us into a world of ubiquitous computing, in which myriads of tiny, untethered sensors and actuators will communicate with each other. Information technology will thus ...

Cambridge University Press2008

Hardware-efficient steering matrix computation architecture for MIMO communication systems

Carl Christian Sten Dominic Senning, Christoph Studer

Beamforming (BF) improves the error rate performance of multiple-input multiple-output (MIMO) wireless communication systems by spatial separation of the transmitted data streams. Spatial separation is achieved by multiplication of the transmit vector by a ...

2008

A 58mW 1.2 mm 2 HSDPA Turbo Decoder ASIC in 0.13 μm CMOS

Andreas Peter Burg, Qiuting Huang

This paper presents the implementation of the 1.2 mm2 HSDPA turbo decoder ASIC in 0.13 mum CMOS achieves a measured maximum frequency of 246 MHz, which translates to a maximum throughput of 20.2 Mb/s at 5.5 iterations. The peak throughput of 10.8 Mb/s requ ...

2008