Results 221 to 230 of about 43,003 (262)

Landslide Monitoring Using Sar Sub-Pixel Offset Tracking

2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI), 2018
In this paper, we address large displacements monitoring using sub-pixel offset tracking. This technique, working only with the amplitude channel, can be applied in the observation of fast movements even in scarcely temporally coherent areas. The case study concerns the Slumgullion landslide (US).
D. Amitrano, M. Costantini, D. Dell'Aglio, A. Iodice, F. Malvarosa, F. Minati, D. Riccio, G. Ruello   +7 more
openaire   +1 more source

A Muli-Channel Combiner with Carrier-Offset Tracking

Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005., 2006
Suppose that a signal's bandwidth exceeds that of any available receiver, but that overlapping sub-bands of the signal are collected by multiple receivers that cover the entire signal bandwidth. An eigenanalysis method is described for reconstruction of the signal from the sub-bands.
E.M. Long, B.F. Rice
openaire   +1 more source

Three-Track Readout Method Using Two Offset Beams

Japanese Journal of Applied Physics, 1996
A high-data-transfer-rate, high-track-density optical recording method using two offset beams to read the data on three tracks was investigated. One beam is offset towards the center track from the center of a side track. Therefore, the readout signal amplitude read from the side track is twice as large as that from the center track.
Hisanobu Dobashi, Takaya Tanabe Takaya Tanabe, Manabu Yamamoto Manabu Yamamoto   +2 more
openaire   +1 more source

Optimization of probe-laser focal offsets for single-particle tracking

Applied Optics, 2012
In optical tweezers applications, tracking a trapped particle is essential for force measurement. One of the most popular techniques for single-particle tracking is achieved by analyzing the forward and backward light pattern, scattered by the target particle trapped by a trap laser beam, of an additional probe-laser beam with different wavelength ...
Ai-Tang, Chang, Yi-Ren, Chang, Sien, Chi, Long, Hsu   +3 more
openaire   +2 more sources

Measuring Coseismic Displacements With Point-Like Targets Offset Tracking

IEEE Geoscience and Remote Sensing Letters, 2014
Offset tracking is an important complement to measure large ground displacements in both azimuth and range dimensions where synthetic aperture radar (SAR) interferometry is unfeasible. Subpixel offsets can be obtained by searching for the cross-correlation peak calculated from the match patches uniformly distributed on two SAR images.
Hu, Xie, Wang, Teng, Liao, Mingsheng
openaire   +2 more sources

Frequency offset tracking for MIMO OFDM systems using pilots

IEEE Wireless Communications and Networking Conference, 2005, 2005
This paper presents an analysis of frequency offset estimation in MIMO OFDM systems. Tracking of frequency offsets is often aided by pilots transmitted in the data payload of a packet. The extension to multiple antenna OFDM systems means that spatial beamforming will occur when transmitting pilots from all antennas simultaneously, which can reduce the ...
M. Sandell, D. McNamara, S. Parker
openaire   +1 more source

A Comparison of Frequency Offset Tracking Algorithms for OFDM

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004
The estimation and tracking of the carrier frequency offset is a crucial issue in the implementation of orthogonal frequency division multiplexing (OFDM) systems. This paper compares two popular frequency offset tracking schemes. The first is the pilot tone-based method where the frequency offset is derived by correlating received symbols with known ...
null Hong Chen, G.J. Pottie
openaire   +1 more source

Millimeter Wave Compressive Path Tracking with Carrier Frequency Offset

2019 IEEE Wireless Communications and Networking Conference (WCNC), 2019
Compressive scanning (CS) has exhibited its potential in improving the path tracking efficiency of millimeter wave (mmWave) systems. However, its practical performance is significantly degenerated by hardware imperfections, such as carrier frequency offset (CFO).
Xi Yang, Wan-Ting Shih, Chao-Kai Wen, Xiao Li, Shi Jin   +4 more
openaire   +1 more source

Residual carrier frequency offset tracking for OFDM-based systems

The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings., 2005
In this work, four tracking schemes are analyzed for OFDM-based systems and simulation experiments are performed for an IEEE 802.11a WLAN system. The first scheme is a newly proposed symbol-by-symbol method, which estimates the carrier phase offset of each OFDM symbol and then appropriate compensation is made.
null Chih-Peng Li, null Po-Lin Chen, null Tsui-Tsai Lin   +2 more
openaire   +1 more source

Analysis of frequency-offset tracking in MIMO OFDM systems

IEEE Transactions on Communications, 2006
This paper presents an analysis of frequency-offset estimation in multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. Tracking of the frequency offset between a transmitter and a receiver is often aided by transmitting pilots embedded in the data payload of a packet.
M. Sandell, D. McNamara, S. Parker
openaire   +1 more source