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Keywords = Ultra Narrow Band (UNB)

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12 pages, 2299 KiB  
Article
Application of Ultra Narrow Band Modulation in Enhanced Loran System
by Boyun Lyu, Yu Hua, Jiangbin Yuan and Shifeng Li
Sensors 2021, 21(13), 4347; https://doi.org/10.3390/s21134347 - 25 Jun 2021
Cited by 5 | Viewed by 2067
Abstract
The Enhanced Loran (eLoran) system is valued for its important role in the positioning, navigation, and timing fields; however, with its current modulation methods, low data rate restricts its development. Ultra narrow band (UNB) modulation is a modulation method with extremely high spectrum [...] Read more.
The Enhanced Loran (eLoran) system is valued for its important role in the positioning, navigation, and timing fields; however, with its current modulation methods, low data rate restricts its development. Ultra narrow band (UNB) modulation is a modulation method with extremely high spectrum utilization. If UNB modulation can be applied to the eLoran system, it will be very helpful. The extended binary phase shift keying modulation in UNB modulation is selected for a detailed study, parameters and application model are designed according to its unique characteristics of signal time and frequency domains, and it is verified through simulation that the application of this modulation not only meets the design constraints of the eLoran system but also does not affect the reception of the respective signals of both parties. Several feasible schemes are compared, analyzed, and selected. Studies have revealed that application of UNB modulation in the eLoran system is feasible, and it will increase the data rate of the system by dozens of times. Full article
(This article belongs to the Section Communications)
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11 pages, 153 KiB  
Article
On BER Performance of EBPSK-MODEM in AWGN Channel
by Lenan Wu and Man Feng
Sensors 2010, 10(4), 3824-3834; https://doi.org/10.3390/s100403824 - 14 Apr 2010
Cited by 42 | Viewed by 9575
Abstract
In order to satisfy the higher and higher demand for communication systems, an Extended Binary Phase Shift Keying (EBPSK) system with very high spectra efficiency has been proposed. During the research, a special kind of filters was found, which can amplify the signal [...] Read more.
In order to satisfy the higher and higher demand for communication systems, an Extended Binary Phase Shift Keying (EBPSK) system with very high spectra efficiency has been proposed. During the research, a special kind of filters was found, which can amplify the signal characteristics and remove utmost noise, i.e., at the point of the phase jumping corresponding to code “1”, produce the amplitude impulse much higher than code “0”, therefore, the aim of our study was to analyze the BER performance of the impacting filter assisted EBPSK-MODEM. Considering the receiver filtered “0” and “1”signal with Rice amplitude distribution, just having different mean values, so the BER performance of EBPSK is deduced based on the classic detection theory, and compared with the traditional BPSK modulation both in spectra efficiency and in BER performance, which lays the theoretical foundation for the feasibility of Ultra Narrow Band communications based on EBPSK modulation. Full article
(This article belongs to the Section Chemical Sensors)
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