Zobrazeno 1 - 10
of 3 033
pro vyhledávání: '"Doppler Shift"'
Publikováno v:
IET Communications, Vol 18, Iss 19, Pp 1564-1573 (2024)
Abstract To reduce the impact of residual Doppler frequency offset (RDFO), a joint DFO estimation and CE scheme is proposed for the OFDM systems under the high‐speed mobile environment. In the paper, the expression of interference power caused by t
Externí odkaz:
https://doaj.org/article/e690874c89a14711bf02b41b0613f3c9
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 11, Pp 2281-2294 (2024)
Abstract Based on frequency of arrival (FOA) and angle of arrival (AOA) measurements, the localisation of a moving source using a number of stationary stations is discussed. A closed‐form solution and bias reduction method using FOA and AOA measure
Externí odkaz:
https://doaj.org/article/499b444619a440628f06ad300c77c7d2
Publikováno v:
International Journal of Electronics and Telecommunications, Vol vol. 70, Iss No 4, Pp 797-803 (2024)
In underwater communications, reciprocal motion between transmitter and receiver has a significant impact on reception quality. In orthogonal broadband systems that provide high bit rates, this problem becomes more important, especially in the higher
Externí odkaz:
https://doaj.org/article/a4b2f7b8351f41aa81f02ad2ae342c36
Publikováno v:
IET Communications, Vol 18, Iss 17, Pp 979-992 (2024)
Abstract This paper proposes a specific algebraic structure and demonstrates its nature as an extension field, enabling the construction of Golomb Costas (GC) arrays. It provides detailed instructions and examples for constructing GC arrays using thi
Externí odkaz:
https://doaj.org/article/1f8a6fd9c10746c1a3beb82ca4761559
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 7, Pp 1116-1131 (2024)
Abstract The performance of Doppler velocity logs (DVLs) in terms of velocity estimate error is directly linked to the geometry of the beam and the pulse transmitted. Beyond a specific transmitted bandwidth, the phase‐shift beamformer can introduce
Externí odkaz:
https://doaj.org/article/c05ee56b60424b3eab627b3b19a650fc
Publikováno v:
IET Communications, Vol 18, Iss 11, Pp 655-670 (2024)
Abstract Here, fast time‐varying channels of high‐mobility vehicle‐to‐vehicle communications for massive multiple‐input multiple‐output orthogonal frequency division multiplexing systems are considered. Large‐scale uniform linear arrays
Externí odkaz:
https://doaj.org/article/35799fccfe5f4a1c8032609089c7d51c
Publikováno v:
GIScience & Remote Sensing, Vol 61, Iss 1 (2024)
Studies on the retrieval of ocean surface current by Synthetic Aperture Radar (SAR) mainly concentrate on coastal regions with land coverage, allowing for continuous land to estimate non-geophysical Doppler shifts. As a strong western boundary in the
Externí odkaz:
https://doaj.org/article/7e03c36f438b4b9b824906095f87fbbf
Publikováno v:
物联网学报, Vol 8, Pp 36-45 (2024)
In space communications, the signal faces long-distance transmission and a high-dynamic relative movement. The long-distance transmission results in a very low signal-to-noise ratio (SNR) and the high-dynamic relative movement causes a high-dynamic D
Externí odkaz:
https://doaj.org/article/6a36358a5726477eb2ace00281fe4b82
Publikováno v:
Electronics Letters, Vol 60, Iss 15, Pp n/a-n/a (2024)
Abstract Compared with the traditional two‐step localization methods, the direct position determination (DPD) method is more robust at low signal‐to‐noise ratio. However, to guarantee the optimal location result, the computational complexity of
Externí odkaz:
https://doaj.org/article/e4bb6d85be2f495d9ff0a1401258b56d
Publikováno v:
IEEE Access, Vol 12, Pp 127100-127114 (2024)
The study of navigation solutions other than GNSS is becoming increasingly important due to growing concerns about the vulnerability of GNSS to interference. The use of existing LEO satellite signals is a promising option in this respect. This study
Externí odkaz:
https://doaj.org/article/d633a071152a4c7691ffc5bb78b49870