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Keywords = Extended Binary Phase Shift Keying (EBPSK)

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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 2061
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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21 pages, 430 KiB  
Article
Nonlinear Detection for a High Rate Extended Binary Phase Shift Keying System
by Xian-Qing Chen and Le-Nan Wu
Sensors 2013, 13(4), 4327-4347; https://doi.org/10.3390/s130404327 - 28 Mar 2013
Cited by 6 | Viewed by 6718
Abstract
The algorithm and the results of a nonlinear detector using a machine learning technique called support vector machine (SVM) on an efficient modulation system with high data rate and low energy consumption is presented in this paper. Simulation results showed that the performance [...] Read more.
The algorithm and the results of a nonlinear detector using a machine learning technique called support vector machine (SVM) on an efficient modulation system with high data rate and low energy consumption is presented in this paper. Simulation results showed that the performance achieved by the SVM detector is comparable to that of a conventional threshold decision (TD) detector. The two detectors detect the received signals together with the special impacting filter (SIF) that can improve the energy utilization efficiency. However, unlike the TD detector, the SVM detector concentrates not only on reducing the BER of the detector, but also on providing accurate posterior probability estimates (PPEs), which can be used as soft-inputs of the LDPC decoder. The complexity of this detector is considered in this paper by using four features and simplifying the decision function. In addition, a bandwidth efficient transmission is analyzed with both SVM and TD detector. The SVM detector is more robust to sampling rate than TD detector. We find that the SVM is suitable for extended binary phase shift keying (EBPSK) signal detection and can provide accurate posterior probability for LDPC decoding. Full article
(This article belongs to the Special Issue Medical & Biological Imaging)
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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 9574
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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10 pages, 214 KiB  
Article
Novel Anti Co-Channel Interference Scheme for Sensor Networks
by Man Feng and Lenan Wu
Sensors 2010, 10(4), 3170-3179; https://doi.org/10.3390/s100403170 - 31 Mar 2010
Cited by 7 | Viewed by 6750
Abstract
With improvement of the automation level, wireless sensors are widely used, but various kinds of interference lead to problems in the application. In order to deal with co-channel interference, a throughput efficient scheme based on Extended Binary Phase Shift Keying (EBPSK) modulation is [...] Read more.
With improvement of the automation level, wireless sensors are widely used, but various kinds of interference lead to problems in the application. In order to deal with co-channel interference, a throughput efficient scheme based on Extended Binary Phase Shift Keying (EBPSK) modulation is introduced in physical layer. On this basis, the corresponding transmission scheme and the important impacting filter are presented. Effects of co-channel interference on the EBPSK waveform in different cases are analyzed. Simulation results illustrate the excellent anti-interference performance of the EBPSK system itself, when the initial phase of the co-channel interference is small. Full article
(This article belongs to the Section Chemical Sensors)
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