Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Yaoliang Song"'
Publikováno v:
EURASIP Journal on Advances in Signal Processing, Vol 2023, Iss 1, Pp 1-14 (2023)
Abstract As massive MIMO is a key technology in the future sixth generation (6G), the large-scale antenna arrays are widely considered in direction-of-arrival (DOA) estimation for they can provide larger aperture and higher estimation resolution. How
Externí odkaz:
https://doaj.org/article/6ac3217da93a4764ac163c428e71a3b3
Publikováno v:
Drones, Vol 7, Iss 7, p 472 (2023)
In this paper, we address the challenge of low recognition rates in existing methods for radar signals from unmanned aerial vehicles (UAV) with low signal-to-noise ratios (SNRs). To overcome this challenge, we propose the utilization of the bispectra
Externí odkaz:
https://doaj.org/article/64c184b7f630477ea4becd42ff202daf
Autor:
Yifan Li, Feng Shu, Jinsong Hu, Shihao Yan, Haiwei Song, Weiqiang Zhu, Da Tian, Yaoliang Song, Jiangzhou Wang
Publikováno v:
Drones, Vol 7, Iss 4, p 256 (2023)
To provide important prior knowledge for the direction of arrival (DOA) estimation of UAV emitters in future wireless networks, we present a complete DOA preprocessing system for inferring the number of emitters via a massive multiple-input multiple-
Externí odkaz:
https://doaj.org/article/66c338130f38449baa74d2489abfefd1
Publikováno v:
IEEE Access, Vol 8, Pp 15923-15930 (2020)
With the rapid development of wireless communications technology, long term evolution (LTE) technology in unlicensed bands (LTE-U) can effectively solve the lack of spectrum resources. However, the competition in LTE-U and wireless fidelity (WiFi) wi
Externí odkaz:
https://doaj.org/article/6f83590cc9ab45009ea1057eab290e53
Publikováno v:
Remote Sensing, Vol 14, Iss 5, p 1271 (2022)
Imaging systems based on millimeter waves (mm-waves) are advancing to achieve higher resolution and wider bandwidth. However, a large bandwidth requires high sample rates, which may limit the development of ultra-wideband imaging systems. In this let
Externí odkaz:
https://doaj.org/article/2412af2063f3492c83170813d3d28d43
Publikováno v:
Radioengineering, Vol 27, Iss 1, Pp 335-341 (2018)
Fractional delay is indispensable for many sorts of circuits and signal processing applications. Fractional delay filter (FDF) utilizing Hermite interpolation with an analog differentiator is a straightforward way to delay discrete signals. This meth
Externí odkaz:
https://doaj.org/article/20edcab3c42b483e92da01b1250de3ff
Publikováno v:
IEEE Access, Vol 6, Pp 22664-22669 (2018)
In this paper, we propose a new technique to generate a range-angle dependent transmit beampattern by introducing a nonlinear frequency modulation scheme based on arctangent function in the frequency diverse array (FDA) system. The propagation proces
Externí odkaz:
https://doaj.org/article/243b74e794064925a98029521b309a0b
Autor:
Shicheng Fan, Yaoliang Song
Publikováno v:
Materials, Vol 13, Iss 21, p 4883 (2020)
In this paper, an ultra-wideband flexible absorber is proposed. Based on a summary of the absorption mechanism, using lossless air to replace the heavy lossy dielectric layer will not substantially impact the absorption. The dielectric layer is only
Externí odkaz:
https://doaj.org/article/1db16e233b5041aba78dd77351721ddb
Autor:
Shicheng Fan, Yaoliang Song
Publikováno v:
International Journal of Antennas and Propagation, Vol 2018 (2018)
We present a perfect UHF metamaterial absorber by combining coupling lines and fractal lines with a very small unit cell. The proposed absorber consists of a surface metal structure and metallic background plane, separated by a dielectric substrate a
Externí odkaz:
https://doaj.org/article/e3f3ef61d22041f984e928096307b172
Autor:
Tong Mu, Yaoliang Song
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 16, Iss 3, Pp 816-826
Abstract A novel time reversal approach for the point target imaging is proposed in this paper. This method requires only single measurement by the time reversal array, and it exploits the space-frequency decomposition plus the rotation invariance of
Externí odkaz:
https://doaj.org/article/21e88b89475f4f2ab0a4d82e9b1cb629