Frequency Dispersion and Time-Selective F ading
First detection of frequency-dependent, time-variable dispersion measures
... While low-frequency data are very useful in computing highly detailed measurements of DM variations, the chromatic- ity we have presented does cause concern as it may imply a mismatch between the DM values ...
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Homogenization of time harmonic Maxwell equations and the frequency dispersion effect
... We summarize here the principal novelties of the present study. We show that to give due consideration to different order relations between the lengths l, l w , and l s , one should study the microscopic time ...
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An Adaptive Receiver for the Time and Frequency Selective Fading Channel
... LEON AND TAYLOR: RECEIVER FOR TIME- AND FREQUENCY-SELECTIVE FADING CHANNEL 2.. Fig0[r] ...
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Identification of LOS in Time Varying, Frequency Selective Radio Channels
... Peculiar to LOS scenarios, first bin includes the LOS component beside some other paths which form the di ff used component defined in (3b). Therefore, in LOS scenarios, h 0 corresponds to the tap (k = 0) that contains ...
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Space-Time Turbo Equalization in Frequency Selective MIMO Channels
... He joined Nippon Telegraph and Telephone Cor- poration (NTT), Tokyo, Japan, in April 1980. From April 1980 to May 1987, he researched signal trans- mission technologies, such as modulation/demodula- tion schemes, as well ...
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Optimizing time and space MIMO antenna system for frequency selective fading channels
... for frequency selective and frequency flat fading channels in the presence of ...and selective fading with CCI is possible by SBM compared to conventional sys- ...
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Space-time diversity for CDMA systems over frequency-selective fading channels
... available frequency spectrum are the most dominant factors in the design of any wireless communication ...loss, time variation of the channel characteris- tic, noise, and other interferences, reduce the ...
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Linear and Nonlinear Time Domain Block Equalizers on MIMO Frequency Selective Channels
... the time domain block linear and nonlinear equalizers for the signal separation and equalization of single carrier transmission on quasi- static frequency selective MIMO, SIMO, and SISO chan- ...
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Performance of compressive sensing algorithms over time varying frequency selective channel
... detection. Time-varying nature of the channel fading and the correlation between the channels due to Doppler frequencies further complicates the system [1] and ...Orthogonal Frequency Division Multiplexing ...
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Effective Needs of Space-Time-Frequency Coding in MIMO-OFDM Communication over Frequency Selective Fading Channels
... Research Scholar, Rayalaseema University, Kurnool, AP, India. Principal, Maulana Mukhtar Ahmad Nadvi Technical Campus, Malegaon, Dist. Nasik, India. ABSTRACT: This paper proposes novel Space-Time-Frequency ...
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A Frequency-Domain Band-MMSE Equalizer for Continuous Phase Modulation over Frequency-Selective Time-Varying Channels
... We will consider here the use of a UW. Indeed, even if the introduction of a UW brings a higher loss of spectral efficiency, compared to the introduction of a CP, this allows to increase the performance of the Block ...
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Wavelength- and Time-Selective Reconfigurable Optical Add/Drop Multiplexer Using Time-Frequency Domain Processing
... a time delay corresponding to a time slot ...a time-gating ...each time slot was allocated to a corresponding spatial channel along the vertical ...and time slots, ...
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Frequency-Shift Zero-Forcing Time-Varying Equalization for Doubly Selective SIMO Channels
... μs, f max = 800 Hz, N = 2, L e = 6, and Q e = ...canonical frequency- domain representation of the minimal norm LTV-ZF equal- izer, which assures the best ABER performances in the pres- ence of AWGN, and we ...
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Simulation Analysis of Time Variant Frequency Selective MIMO-OFDM Channel in Mobile Environment
... C. Frequency Selective Communication with OFDM 1) OFDM System Model: Multicarrier communication can be compared with conventional frequency division multiplexing where the sub bands are completely ...
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Frequency Dispersion Limits Resolution in Veselago Lens
... continuous frequency spectrum with finite density, and that both epsilon and mu exhibited frequency ...the frequency ω e , at which the relative values of epsilon and mu where equal to −1, was also ...
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Design Of Nonlinear Frequency Selective Limiter
... the frequency selective limiters will suppress large input signals and mechanical ...a time delay before the achievement of limiting force. This delay time depends on the type of ...delay ...
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Differential Semi Blind Beamspace-Time Interference Cancellation for DS WCDMA Systems in Frequency Selective Time-Varying Channels
... II. S YSTEM MODEL We consider the reverse link of an asynchronous DS-CDMA system employing complex spreading [5] and π/4-DQPSK data modulation to reduce peak-average ratio and achieve better robustness to phase ...
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Low Complexity Iterative Receiver for Space Time Coded Signals over Frequency Selective Channels
... Received 31 May 2001 and in revised form 18 March 2002 We propose a low-complexity turbo-detector scheme for frequency selective multiple-input multiple-output channels. The detec- tion part of the receiver ...
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High-Frequency FET Modeling in GaN with Dispersion Effects
... Unfortunately, dispersion in GaN HEMT’s is a common problem where the dispersive output admittance reduces PAE (power-added ...efficiency). Dispersion also manifests in the response of the drain current to ...
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3.5.1 CORRELATION MODELS FOR FREQUENCY SELECTIVE FADING
... T T Figure 4.6: Block Fading Model Consider the situation where the channel is observed over blocks of duration T < T small , but channel real- izations are independent from block to block. Such a scenario might arise in ...
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