scholarly journals Application of Ultra Narrow Band Modulation in Enhanced Loran System

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4347
Author(s):  
Boyun Lyu ◽  
Yu Hua ◽  
Jiangbin Yuan ◽  
Shifeng Li
Keyword(s):  
Narrow Band ◽  
Data Rate ◽  
Modulation Method ◽  
Phase Shift Keying ◽  
Spectrum Utilization ◽  
Frequency Domains ◽  
Shift Keying ◽  
Modulation Methods ◽  
Binary Phase Shift Keying ◽  
Signal Time

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.

scholarly journals Performance Examination of OFDM Modulation Techniques in LTE 4G

2019 ◽  
Vol 9 (2) ◽  
pp. 3401-3404
Keyword(s):  
Phase Shift ◽  
Additive White Gaussian Noise ◽  
Phase Shift Keying ◽  
High Data ◽  
Modulation Techniques ◽  
Shift Keying ◽  
Modulation Methods ◽  
Performance Examination ◽  
Binary Phase Shift Keying

The digital modulation methods are being chosen in high data rate systems as Long Term Evolution (LTE) and LTE-A. Quadrature Phase Shift Keying (QPSK) and Binary Phase Shift Keying (BPSK) is the simplest form of the PSK with double carrying capacity when compare to the other traditional techniques in modulation. In conventional method the performance was analyzed in MIMO .In this paper proposed the performance analysis of BPSK and QPSK modulator and demodulator in LTE 4G system models under the Additive white Gaussian Noise (AWGN) and Rayleigh fading by comparing the Bit Error Rate (BER). From the analysis, compare to BPSK QPSK has good BER. Using the MATLAB Simulink tool Implementation is performed.

A MEMS BPSK to ASK converter

2019 ◽  
Vol 36 (1) ◽  
pp. 26-34 ◽  
Author(s):  
Jeremy Scerri ◽  
Barnaby Portelli ◽  
Ivan Grech ◽  
Edward Gatt ◽  
Owen Casha
Keyword(s):  
Data Rate ◽  
Optimized Design ◽  
Phase Shift Keying ◽  
Element Analysis ◽  
Content Type ◽  
Energy Harvesters ◽  
Theoretical Predictions ◽  
Shift Keying ◽  
Binary Phase Shift Keying ◽  
Process Constraints

Purpose The purpose of this paper is to investigate the feasibility of using micro electromechanical systems (MEMS) to convert a binary phase shift keying (BPSK) signal to a simpler amplitude shift keying (ASK) scheme. Design/methodology/approach The prototype is designed within the SOIMUMPs® fabrication process constraints. The fabrication constraints imposed geometric limitations on what could be tested. These constraints were used to build a mathematical model, which in turn was used to optimize the response using MATLAB®. The optimized design was tested using finite element analysis with CoventorWare®, and finally lab tests on the fabricated device were performed to confirm theoretical predictions. Findings Theoretical predictions compared well with lab measurements on a prototype device measuring 2.9 mm2. The prototype was tested with a carrier frequency of 174 kHz at a BPSK data rate of 3 kHz and carrier amplitude of 6 V. With these parameters, ASK modulation indices of 0.96 and 0.94 were measured at the two output sensors. Originality/value This study provides a MEMS solution for BPSK to ASK conversion. The study also identifies what limits betterment of the modulation index and data rate. Such a device has potential application in wireless sensor network (WSN) nodes that have energy harvesters and sensors that are also built in MEMS. Being a MEMS device, it can facilitate integration in such WSN nodes and, hence, potentially reduce size and costs.

Chaotic Oscillator-Based Binary Phase-Shift Keying

2014 ◽  
Vol 61 (5) ◽  
pp. 1578-1587 ◽  
Author(s):  
Luke T. Harwood ◽  
Paul A. Warr ◽  
Mark A. Beach
Keyword(s):  
Phase Shift ◽  
Chaotic Oscillator ◽  
Phase Shift Keying ◽  
Binary Phase ◽  
Shift Keying ◽  
Binary Phase Shift Keying

scholarly journals An Energy-Synchronous Direct Antenna Modulation Method for Phase Shift Keying

2020 ◽  
Vol 1 ◽  
pp. 41-46
Author(s):  
Kurt Schab ◽  
Danyang Huang ◽  
Jacob J. Adams
Keyword(s):  
Phase Shift ◽  
Modulation Method ◽  
Phase Shift Keying ◽  
Shift Keying

Multiuser communication scheme based on binary phase-shift keying and chaos for telemedicine

2018 ◽  
Vol 162 ◽  
pp. 165-175 ◽  
Author(s):  
J.A. Michel-Macarty ◽  
M.A. Murillo-Escobar ◽  
R.M. López-Gutiérrez ◽  
C. Cruz-Hernández ◽  
L. Cardoza-Avendaño
Keyword(s):  
Phase Shift ◽  
Phase Shift Keying ◽  
Multiuser Communication ◽  
Binary Phase ◽  
Shift Keying ◽  
Communication Scheme ◽  
Binary Phase Shift Keying

Reduction of PAPR in FBMC System Using Different Reduction Techniques

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Arun Kumar ◽  
Hemant Rathore
Keyword(s):  
Phase Shift ◽  
Research Study ◽  
Average Power ◽  
Phase Shift Keying ◽  
Reduction Techniques ◽  
Quadrature Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying ◽  
Clipping Technique ◽  
Binary Phase Shift Keying

AbstractIn this research study, different Peak Average Power Ratio (PAPR) based reduction techniques, namely, A-Law companding, µ-Law companding, Clipping & Filtering and Clipping are analyzed for Filter Band Multi-Carrier (FBMC) with different transmission systems such as Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), 64-QPSK and 64-Quadrature Amplitude Modulation. It is estimated that the PAPR reduction can benefit by using clipping technique in FBMC.

scholarly journals Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity Modulation

2019 ◽  
Vol 9 (18) ◽  
pp. 3724 ◽  
Author(s):  
Jiang ◽  
Zhao ◽  
Liu ◽  
Deng ◽  
Luo ◽  
...  
Keyword(s):  
Atmospheric Turbulence ◽  
Channel Capacity ◽  
Communication System ◽  
Rayleigh Distribution ◽  
Intensity Modulation ◽  
Phase Shift Keying ◽  
Free Space Optical ◽  
Pointing Error ◽  
Shift Keying ◽  
Binary Phase Shift Keying

The improvement for hybrid radio frequency–free space optical (RF–FSO) communication system in wireless optical communications has acquired growing interests in recent years, but rarely improvement is based on hybrid modulation. Therefore, we conduct a research on end-to-end mixed RF–FSO system with the hybrid pulse position modulation–binary phase shift keying–subcarrier intensity modulation (PPM–BPSK–SIM) scheme. The RF link obeys Rayleigh distribution and the FSO link experiences Gamma–Gamma distribution. The average bit error rate (BER) for various PPM–BPSK–SIM schemes has been derived with consideration of atmospheric turbulence influence and pointing error condition. The outage probability and the average channel capacity of the system are discussed as well. Simulation results indicate that the pointing error aggravates the influence of atmospheric turbulence on the channel capacity, and the RF–FSO systematic performance is improved obviously while adopting PPM–BPSK–SIM under strong turbulence and severe pointing error conditions, especially, when the system average symbol length is greater than eight.

A Beamformer Employing Pseudo-Interference Technique for Digital Communication Systems

2011 ◽  
Vol 403-408 ◽  
pp. 1214-1217
Author(s):  
Yi Chu ◽  
Wei Yau Horng
Keyword(s):  
Communication Systems ◽  
Superior Performance ◽  
Adaptive Array ◽  
Phase Shift Keying ◽  
Excellent Performance ◽  
Shift Keying ◽  
Gain Errors ◽  
Binary Phase Shift Keying ◽  
Digital Communication Systems ◽  
Array Gain

This paper presents a new receiver for antenna array to provide robustness against adaptive array imperfections. These imperfections include the array gain errors and the directional mismatch. The superior performance of the proposed receiver is primarily achieved by adding an injected pseudo-interference in the diagonally loaded Capon beamformer. Simulation results demonstrate that the proposed method has excellent performance for both binary phase shift keying (BPSK) and quadrature amplitude modulation (QAM) systems.

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