Results 201 to 210 of about 762 (245)
Some of the next articles are maybe not open access.
Enhancement of accuracy in OTF measurement
Applied Optics, 1987A knife-edge scanning method was developed to enhance the accuracy in OTF measurement. A slit image formed by the lens under test was scanned by a knife-edge which was moved by a stepping motor. It was possible to increase the signal-to-noise ratio with averaging 4-32 data at each point through a scan. The standard deviation was decreased to under 0.25%
K H, Hong, I W, Lee, H M, Cho, Y W, Lee
openaire +2 more sources
Optical Engineering, 1975
A working group of the Japan Optical Engineering Research Association (JOERA) has been organized on April, 1974 and has made a start for making Japanese OTF standard by 1976. This working group will make the draft for OTF standard such as 1) optical systems to be applied, 2) definition of OTF and MTF, 3) standard graphical representation of OTF and MTF,
Teruji Ose, Kazumi Murata
openaire +1 more source
A working group of the Japan Optical Engineering Research Association (JOERA) has been organized on April, 1974 and has made a start for making Japanese OTF standard by 1976. This working group will make the draft for OTF standard such as 1) optical systems to be applied, 2) definition of OTF and MTF, 3) standard graphical representation of OTF and MTF,
Teruji Ose, Kazumi Murata
openaire +1 more source
2017
As we have already indicated in discussing geometrical optics in the previous two chapters, rays from a point object in a perfect optical system form a homocentric pencil of rays that converge to a point image; and the wave fronts (which, by definition, are perpendicular to the rays) are spherical.
Charles S. Williams, Orville A. Becklund
openaire +1 more source
As we have already indicated in discussing geometrical optics in the previous two chapters, rays from a point object in a perfect optical system form a homocentric pencil of rays that converge to a point image; and the wave fronts (which, by definition, are perpendicular to the rays) are spherical.
Charles S. Williams, Orville A. Becklund
openaire +1 more source
Optica Acta: International Journal of Optics, 1971
The concept of the assessment of image quality by means of the optical transfer function (OTF) is traced from the early use of sine wave test charts through to the development of the high precision...
openaire +1 more source
The concept of the assessment of image quality by means of the optical transfer function (OTF) is traced from the early use of sine wave test charts through to the development of the high precision...
openaire +1 more source
Spectrally Precoded OTFS Modulation
2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall), 2022Wei-Chang Chen +2 more
openaire +1 more source
OTFS Performance on Static Multipath Channels
IEEE Wireless Communications Letters, 2019Orthogonal time frequency space (OTFS) modulation is known to achieve excellent error performance in delay–Doppler channels. However, its performance over static multipath channels has never been fully investigated. In this letter, we show that, in static multipath channels, the system structure of OTFS is equivalent to the asymmetric orthogonal ...
Patchava Raviteja +2 more
openaire +1 more source
Research on OTFS Systems for 6G
2022 IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom), 2022Bei Li +8 more
openaire +1 more source
OTFS and Delay Doppler Communications
2023 28th Asia Pacific Conference on Communications (APCC), 2023Y. Hong, Masahiro Umehira
openaire +1 more source
A Novel Waveform for Future Wireless Communication Systems: Data Peninsular‐OTFS (DP‐OTFS)
International Journal of Communication SystemsABSTRACTIn this work, we propose a novel Data Peninsular‐OTFS (DP‐OTFS) waveform technique to provide better resilience against intersymbol and intercarrier interferences in high‐mobility, doubly dispersive channels. We design the transmit symbol mapping in such a way that the circular convolution relationship is maintained between the transmit and ...
S. Uma Maheswari +2 more
openaire +1 more source
Performance Analysis of Coded OTFS Systems Over High-Mobility Channels
IEEE Transactions on Wireless Communications, 2021Shuangyang Li +2 more
exaly