Results 1 - 10 of 1,065

Coherence Bandwidth Characterisation at mm-waves

by Andreas G. Siamarou, Miqdad O. Al-Nuaimi , 2002
"... Distributions of 62. 4GHz wideband propagation measurements undertaken in two different indoor radio channels to measure spaced-frequency correlation functions are presented. The 90th percentile of the coherence bandwidth at 0.9 correlation level of for all locations values stays below 72MHz. Minimu ..."
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Distributions of 62. 4GHz wideband propagation measurements undertaken in two different indoor radio channels to measure spaced-frequency correlation functions are presented. The 90th percentile of the coherence bandwidth at 0.9 correlation level of for all locations values stays below 72MHz

Time Delay and Coherence Bandwidth Evaluation in Urban Environment

by For Pcs Microcells, Athanasios Kanatas, Nektarios Moraitis, George Pantos, Philip Constantinou , 2002
"... This paper reports the measurement and analysis of wideband radio channel in urban propagation environment. RMS delay spread values are evaluated as well as the coherence bandwidth of the channel is derived by the frequency correlation function for 0.9 correlation. Furthermore, delay windows and sig ..."
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This paper reports the measurement and analysis of wideband radio channel in urban propagation environment. RMS delay spread values are evaluated as well as the coherence bandwidth of the channel is derived by the frequency correlation function for 0.9 correlation. Furthermore, delay windows

The SGI Origin: A ccNUMA highly scalable server

by James Laudon, Daniel Lenoski - In Proceedings of the 24th International Symposium on Computer Architecture (ISCA’97 , 1997
"... The SGI Origin 2000 is a cache-coherent non-uniform memory access (ccNUMA) multiprocessor designed and manufactured by Silicon Graphics, Inc. The Origin system was designed from the ground up as a multiprocessor capable of scaling to both small and large processor counts without any bandwidth, laten ..."
Abstract - Cited by 497 (0 self) - Add to MetaCart
The SGI Origin 2000 is a cache-coherent non-uniform memory access (ccNUMA) multiprocessor designed and manufactured by Silicon Graphics, Inc. The Origin system was designed from the ground up as a multiprocessor capable of scaling to both small and large processor counts without any bandwidth

Relations between Coherence Bandwidth and Average Mode Bandwidth in Reverberation Chamber for Wireless Device measurement

by Xiaoming Chen, Per-simon Kildal
"... The reverberation chamber is basically a metal cavity with many excited modes which are stirred to create a statistical isotropic field environment with Rayleigh distributed magnitudes of the field [1]. The reverberation chamber used here is 1.8 m х 1.4 m х 1.2 m in size. The chamber makes ..."
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The reverberation chamber is basically a metal cavity with many excited modes which are stirred to create a statistical isotropic field environment with Rayleigh distributed magnitudes of the field [1]. The reverberation chamber used here is 1.8 m х 1.4 m х 1.2 m in size. The chamber makes

Larrabee: a many-core x86 architecture for visual computing

by Larry Seiler, Doug Carmean, Eric Sprangle, Tom Forsyth, Michael Abrash, Pradeep Dubey, Stephen Junkins, Adam Lake, Jeremy Sugerman, Robert Cavin, Roger Espasa, Toni Juan, Pat Hanrahan - In SIGGRAPH ’08: ACM SIGGRAPH 2008 papers , 2008
"... Abstract 123 This paper presents a many-core visual computing architecture code named Larrabee, a new software rendering pipeline, a manycore programming model, and performance analysis for several applications. Larrabee uses multiple in-order x86 CPU cores that are augmented by a wide vector proces ..."
Abstract - Cited by 279 (12 self) - Add to MetaCart
coherent on-die 2 nd level cache allows efficient inter-processor communication and high-bandwidth local data access by CPU cores. Task scheduling is performed entirely with software in Larrabee, rather than in fixed function logic. The customizable software graphics rendering pipeline for this

Speculative Versioning Cache

by Sridhar Gopal, T. N. Vijaykumar James, E. Smith, Gurindar S. Sohi - In Proceedings of the Fourth International Symposium on High-Performance Computer Architecture , 1998
"... Dependences among loads and stores whose addresses are unknown hinder the extraction of instruction level parallelism during the execution of a sequential program. Such ambiguous memory dependences can be overcome by memory dependence speculation which enables a load or store to be speculatively exe ..."
Abstract - Cited by 207 (8 self) - Add to MetaCart
approach, the Address Resolution Buffer(ARB) uses a centralized buffer to support speculative versions. Our proposal, called the Speculative Versioning Cache(SVC), uses distributed caches to eliminate the latency and bandwidth problems of the ARB. The SVC conceptually unifies cache coherence

Bandwidth Occupancy of Non-Coherent Wideband Fading Channels

by Jinfeng Du, Elza Erkip
"... Abstract—Peaky and non-peaky signaling schemes have long been considered species apart in non-coherent wideband fading channels, as the first approaches asymptotically the linear-in-power capacity of a wideband AWGN channel with the same SNR, whereas the second reaches a nearly power-limited peak ra ..."
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Abstract—Peaky and non-peaky signaling schemes have long been considered species apart in non-coherent wideband fading channels, as the first approaches asymptotically the linear-in-power capacity of a wideband AWGN channel with the same SNR, whereas the second reaches a nearly power-limited peak

Bandwidth efficient coherent lidar based on phase-diversity

by Tongqing Liao, Mahmood Hameed, Rongqing Hui , 2015
"... detection ..."
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Bandwidth Adaptive Snooping

by Milo M. K. Martin, Daniel J. Sorin, Mark D. Hill, David A. Wood , 2002
"... This paper advocates that cache coherence protocols use a bandwidth adaptive approach to adjust to varied system configurations (e.g., number of processors) and workload behaviors. We propose Bandwidth Adaptive Snooping Hybrid (BASH), a hybrid protocol that ranges from behaving like snooping (by bro ..."
Abstract - Cited by 36 (14 self) - Add to MetaCart
This paper advocates that cache coherence protocols use a bandwidth adaptive approach to adjust to varied system configurations (e.g., number of processors) and workload behaviors. We propose Bandwidth Adaptive Snooping Hybrid (BASH), a hybrid protocol that ranges from behaving like snooping (by

Design of a multiband OFDM system for realistic UWB channel environments

by Anuj Batra, Jaiganesh Balakrishnan, G. Roberto Aiello, Jeffrey R. Foerster - IEEE Trans. Microwave Theory Tech , 2004
"... Commission allocated 7500 MHz of spectrum for unlicensed use of commercial ultra-wideband (UWB) communication devices. This spectral allocation has initiated an extremely productive activity for industry and academia. Wireless communications experts now consider UWB as available spectrum to be utili ..."
Abstract - Cited by 121 (0 self) - Add to MetaCart
multipath propagation channel, where objects in the environment can cause multiple reflections to arrive at the receiver (RX). For narrow-band systems, these reflections will not be resolvable by the RX when the narrow-band system bandwidth is less than the coherence bandwidth of the channel. The large
Results 1 - 10 of 1,065