Results 61 to 70 of about 491,261 (311)
IEEE Photonics Journal, 2020 Orthogonal time-frequency-space (OTFS) modulation is a promising two-dimensional (2D) signal technique to tackle high mobility time-varying wireless channels.
Jie Zhong +3 more
doaj +1 more source
Spectral reuse for pilot-aided MIMO-OFDM systems over broadcast time dispersive frequency selective fading channels [PDF]
, 2004 This paper combines the techniques of multiple-input multiple-output (MIMO) antennas and orthogonal frequency division multiplexing (OFDM) to deliver high-capacity high-data-rate wireless communications over broadcast time dispersive frequency selective ...
Ng, TS, Pan, Z, Wong, KK
core +1 more source
Orthogonal Time Frequency Space Modulation: A Discrete Zak Transform Approach
CoRR, 2021 13 pages, 11 figures, submitted to IEEE Transaction on Wireless ...
Franz Lampel +2 more
openaire +2 more sources
FEBS Open Bio, EarlyView.ERα splice variant ERα∆7 lacks the C‐terminus, and its expression may change phenotypes of breast cancers. Our results showed that ERα∆7 is found in the luminal A subtype, and elevated ERα∆7 levels are linked to improved cell survival with lower proliferation and migration.
Long Wai Tsui +10 more
wiley +1 more source
Efficient use of space-time clustering for underwater acoustic communications [PDF]
, 2018 Underwater acoustic (UWA) communication channels are characterized by the spreading of received signals in space (direction of arrival) and in time (delay). The spread is often limited to a small number of space-time clusters.
Li, Jianghui, Zakharov, Yuriy
core +1 more source
FEBS Open Bio, EarlyView.This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill +4 more
wiley +1 more source
Teknologi dan Kejuruan, 2012 It is well known that space-time diversity using space-time coding (STC) is an effective technique to improve wireless communication performance. STC was designed for flat fading channel and consist of space-time trellis code (STTC) and space-time block ...
Muladi Muladi
doaj +1 more source
, 2016 In this paper, we present a new multi-antenna modulation scheme, termed as {\em space-time index modulation (STIM)}. In STIM, information bits are conveyed through antenna indexing in the spatial domain, slot indexing in the time domain, and $M$-ary ...
Chockalingam, A. +2 more
core +1 more source
A full rate concatenated space-frequency and space-time OFDM over Naftali fading channels [PDF]
, 2005 In this paper we investigate 2 transmit and 1 receive (2Tx:1Rx) space-frequency orthogonal frequency division multiplexing (SF-OFDM) and space-time OFDM (ST-OFDM) concatenated with convolutional channel coding as a redundancy method to combat channel ...
Ismail, Mahamod +3 more
core +1 more source
Directed evolution of enzymes at the crossroads of tradition and innovation
FEBS Open Bio, EarlyView.An iterative cycle of data‐driven enzyme optimization comprising four stages: genetic diversification of a template enzyme, expression of protein variants, high‐throughput evaluation, and machine‐learning‐guided redesign of the next variant library.
Maria Tomkova +2 more
wiley +1 more source