Zobrazeno 1 - 10
of 1 143
pro vyhledávání: '"frequency selective fading"'
Publikováno v:
Journal of ICT Research and Applications, Vol 18, Iss 1 (2024)
The performance of the phase shift keying (PSK) modulation technique over additive white Gaussian noise (AWGN) and multipath propagation channels generally becomes worse for higher-order modes. Therefore, a new modulation technique should be provided
Externí odkaz:
https://doaj.org/article/60f7a3bb9a7e450fac1a46a4b02feb83
Autor:
Y.K., Shobha, H.G., Rangaraju
Publikováno v:
International Journal of Pervasive Computing and Communications, 2022, Vol. 18, Issue 5, pp. 664-677.
Externí odkaz:
http://www.emeraldinsight.com/doi/10.1108/IJPCC-09-2021-0217
Autor:
Rui Deng, Wenyi Zhang
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 4, Pp 1957-1975 (2023)
Motivated by the demand of cheap hardware and low computational complexity in massive connectivity, we propose a scheme in which transmitters send data encoded by Bloom filter with On-Off Keying (OOK) modulation and receiver performs hard-decision en
Externí odkaz:
https://doaj.org/article/cbbea1ac09d44f54afa9d193c234f102
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 4, Pp 1544-1550 (2023)
Massive machine type communication (mMTC) is expected to support the connections of billion devices, where a sporadic short packet transmission is a key feature for mMTC applications. Conventional pilot-based coherent schemes suffer from a huge resou
Externí odkaz:
https://doaj.org/article/dd9a8353e4e34f91a17aba7e3a29c96d
Publikováno v:
Dianzi Jishu Yingyong, Vol 47, Iss 2, Pp 41-44 (2021)
With the rapidly increasing interests in ocean observation and ocean Internet of Things, low-cost underwater acoustic communication equipment draws more and more attention from the research community. The low complexity and high reliability multi fre
Externí odkaz:
https://doaj.org/article/80fa1771475947ea9ddad4ded99a490a
Autor:
Ashraf Y. Hassan
Publikováno v:
IEEE Access, Vol 9, Pp 2805-2818 (2021)
In this work, a diversity encoder maps vectors of N modulated symbols to vectors of N diversity symbols using an orthogonal matrix. Each modulated symbol appears in N diversity symbols. An Orthogonal-Frequency-Division-Multiplexing (OFDM) modulator c
Externí odkaz:
https://doaj.org/article/42dcbd75239e47668454f6c872836391
Publikováno v:
Jordanian Journal of Computers and Information Technology, Vol 6, Iss 4, Pp 361-376 (2020)
In this paper, the least-squares channel estimation (LSCE) is investigated for Massive-Multiple-Input Multiple-Output (Ma-MIMO) OFDM systems based on pilot tones. The uplink (UL) transmission is considered, in which a channel estimation approach is p
Externí odkaz:
https://doaj.org/article/49ea28ce1bec4326975cecaf3ef680f9
Autor:
Benjamin K. Ng, Chan-Tong Lam
Publikováno v:
Applied Sciences, Vol 12, Iss 24, p 12803 (2022)
A novel single-carrier-based space-time code construction scheme to exploit the advantages of a frequency-selective fading channel is investigated in this paper. The proposed construction scheme is based on multiplexing independent streams of phase-r
Externí odkaz:
https://doaj.org/article/4dc6dca0df944dd2ba8c3391f9c83ffc
Publikováno v:
IEEE Access, Vol 8, Pp 40559-40572 (2020)
Frame arrival detection is the first crucial task for a digital communication receiver. In this paper, we propose a new frame arrival detection method based on the concept of matched filtering. The proposed training sequence consists of three repeate
Externí odkaz:
https://doaj.org/article/344a66d8efd24dada50f25eeda21afec
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