Results 1  10
of
142,590
Spectral Efficiency in the Wideband Regime
, 2002
"... The tradeoff of spectral efficiency (b/s/Hz) versus energy perinformation bit is the key measure of channel capacity in the wideband powerlimited regime. This paper finds the fundamental bandwidthpower tradeoff of a general class of channels in the wideband regime characterized by low, but nonz ..."
Abstract

Cited by 393 (29 self)
 Add to MetaCart
The tradeoff of spectral efficiency (b/s/Hz) versus energy perinformation bit is the key measure of channel capacity in the wideband powerlimited regime. This paper finds the fundamental bandwidthpower tradeoff of a general class of channels in the wideband regime characterized by low
Spectral Efficiency of CDMA with Random Spreading
 IEEE TRANS. INFORM. THEORY
, 1999
"... The CDMA channel with randomly and independently chosen spreading sequences accurately models the situation where pseudonoise sequences span many symbol periods. Furthermore, its analysis provides a comparison baseline for CDMA channels with deterministic signature waveforms spanning one symbol per ..."
Abstract

Cited by 313 (23 self)
 Add to MetaCart
period. We analyze the spectral efficiency (total capacity per chip) as a function of the number of users, spreading gain, and signaltonoise ratio, and we quantify the loss in efficiency relative to an optimally chosen set of signature sequences and relative to multiaccess with no spreading. White
Spectral Efficiency
"... Spectral efficiency is a measure of the performance of channel coding methods. It refers to the ability of a given channel encoding method to utilize bandwidth efficiently. It is defined as the average number of bits per unit of time (bit rate) that can be transmitted per unit of bandwidth (bits per ..."
Abstract
 Add to MetaCart
Spectral efficiency is a measure of the performance of channel coding methods. It refers to the ability of a given channel encoding method to utilize bandwidth efficiently. It is defined as the average number of bits per unit of time (bit rate) that can be transmitted per unit of bandwidth (bits
On the Spectral Efficiency of Large CDMA
, 2003
"... The spectral efficiency of large CDMA systems using higher order modulation schemes is investigated. Therefore, the asymptotic analysis for single cell systems and random spreading codes is used to obtain the signaltointerferenceandnoise ratio (SINR) after the Matched Filter (MF) and Linear Minim ..."
Abstract
 Add to MetaCart
The spectral efficiency of large CDMA systems using higher order modulation schemes is investigated. Therefore, the asymptotic analysis for single cell systems and random spreading codes is used to obtain the signaltointerferenceandnoise ratio (SINR) after the Matched Filter (MF) and Linear
Spectral Efficiency WDM Systems
, 2004
"... The current emphasis on lightwave systems is on increasing the spectral efficiency of WDM systems. One of the techniques that is used for achieving high spectral efficiency in WDM systems is vestigial side band demultiplexing. This thesis reports the modeling and analysis of an experimental 40 Gbit/ ..."
Abstract
 Add to MetaCart
The current emphasis on lightwave systems is on increasing the spectral efficiency of WDM systems. One of the techniques that is used for achieving high spectral efficiency in WDM systems is vestigial side band demultiplexing. This thesis reports the modeling and analysis of an experimental 40 Gbit
Spectral efficiency of multicarrier CDMA
 IEEE Trans. Inf. Theory
, 2005
"... Abstract—We analyze the spectral efficiency (sumrate per subcarrier) of randomly spread synchronous multicarrier codedivision multiple access (MCCDMA) subject to frequencyselective fading in the asymptotic regime of number of users and bandwidth going to infinity with a constant ratio. Both upli ..."
Abstract

Cited by 16 (1 self)
 Add to MetaCart
Abstract—We analyze the spectral efficiency (sumrate per subcarrier) of randomly spread synchronous multicarrier codedivision multiple access (MCCDMA) subject to frequencyselective fading in the asymptotic regime of number of users and bandwidth going to infinity with a constant ratio. Both
On the spectral efficiency of a sphere
 PIER
, 2007
"... Abstract—In many cases it is desired to have both high capacity and small antennas in wireless communication systems. Unfortunately, the antenna performance deteriorates when the antennas get electrically small. In this paper, fundamental limitations from antenna theory and broadband matching are us ..."
Abstract

Cited by 3 (0 self)
 Add to MetaCart
are used to analyze fundamental limitations on the spectral efficiency of an arbitrary antenna inserted inside a sphere. 1.
SpectrallyEfficient Continuous Phase Modulations
 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
, 2009
"... Abstract—We investigate the spectral efficiency of continuous phase modulations (CPMs). To this end, we need an effective bandwidth definition for a CPM signal, whose power spectral density has in principle an infinite support. The definition we adopt is based on the spacing between adjacent carrier ..."
Abstract

Cited by 12 (7 self)
 Add to MetaCart
Abstract—We investigate the spectral efficiency of continuous phase modulations (CPMs). To this end, we need an effective bandwidth definition for a CPM signal, whose power spectral density has in principle an infinite support. The definition we adopt is based on the spacing between adjacent
Laplacian eigenmaps and spectral techniques for embedding and clustering.
 Proceeding of Neural Information Processing Systems,
, 2001
"... Abstract Drawing on the correspondence between the graph Laplacian, the LaplaceBeltrami op erator on a manifold , and the connections to the heat equation , we propose a geometrically motivated algorithm for constructing a representation for data sampled from a low dimensional manifold embedded in ..."
Abstract

Cited by 668 (7 self)
 Add to MetaCart
in a higher dimensional space. The algorithm provides a computationally efficient approach to nonlinear dimensionality reduction that has locality preserving properties and a natural connection to clustering. Several applications are considered. In many areas of artificial intelligence, information
Comments on Spectral Efficiency of VMSK
, 2002
"... This paper demonstrates that no ultra narrow band modulation method, which includes VMSK and VPSK, can have substantially greater efficiency than conventional methods, such as QAM, in transmission in the same frequency band. ..."
Abstract

Cited by 1 (1 self)
 Add to MetaCart
This paper demonstrates that no ultra narrow band modulation method, which includes VMSK and VPSK, can have substantially greater efficiency than conventional methods, such as QAM, in transmission in the same frequency band.
Results 1  10
of
142,590