Performance Examination of OFDM Modulation Techniques in LTE 4G

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.

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A Coherent Performance for Noncoherent Wireless Systems Using AdaBoost Technique

Applied Sciences ◽

10.3390/app9020256 ◽

2019 ◽

Vol 9 (2) ◽

pp. 256 ◽

Cited By ~ 1

Author(s):

Heba Gamal ◽

Nour Eldin Ismail ◽

M. R. M. Rizk ◽

Mohamed E. Khedr ◽

Moustafa H. Aly

Keyword(s):

Phase Shift ◽

Fading Channels ◽

Additive White Gaussian Noise ◽

Prediction Rule ◽

Phase Shift Keying ◽

Adaptive Boosting ◽

Adaboost Algorithm ◽

Modulation Techniques ◽

Shift Keying ◽

Precise Prediction

Boosting is a machine learning approach built upon the idea of producing a highly precise prediction rule by combining many relatively weak and imprecise rules. The Adaptive Boosting (AdaBoost) algorithm was the first practical boosting algorithm. It remains one of the most broadly used and studied, with applications in many fields. In this paper, the AdaBoost algorithm is utilized to improve the bit error rate (BER) of different modulation techniques. By feeding the noisy received signal into the AdaBoost algorithm, it is able to recover the transmitted data from the noisy signal. Consequently, it reconstructs the constellation diagram of the modulation technique. This is done by removing the noise that affects and changes the signal space of the data. As a result, AdaBoost shows an improvement in the BER of coherently detected binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK). The AdaBoost is next used to improve the BER of the noncoherent detection of the used modulation techniques. The improvement appears in the form of better results of the noncoherent simulated BER in comparison to that of the theoretical noncoherent BER. Therefore, the AdaBoost algorithm is able to achieve a coherent performance for the noncoherent system. The AdaBoost is simulated for several techniques in additive white Gaussian noise (AWGN) and Rayleigh fading channels so, as to verify the improving effect of the AdaBoost algorithm.

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Improved SNR Estimation Technique for BPSK and QPSK Signals

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.239-240.994 ◽

2012 ◽

Vol 239-240 ◽

pp. 994-999

Author(s):

Guang Zu Liu ◽

Jian Xin Wang

Keyword(s):

Phase Shift ◽

Signal To Noise Ratio ◽

Additive White Gaussian Noise ◽

Estimation Accuracy ◽

Estimation Technique ◽

Phase Shift Keying ◽

Low Snr ◽

Mathematical Relation ◽

Shift Keying ◽

Binary Phase Shift Keying

To improve the estimation accuracy of non-data-aided (NDA) signal-to-noise ratio (SNR) estimators at low SNR value, A novel estimation technique for binary phase-shift keying and quadrature phase-shift keying signals in complex additive white Gaussian noise channel is proposed. The mathematical relation between SNR and the ratio of two simple statistical computations is derived, then SNR is determined by looking up a table. Its accuracy surpasses other NDA estimators, approaching closely to the Cramer-Rao lower bound at SNR > 5dB.

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Bit error analysis of binary phase shift keying modulation over additive white gaussian noise channel using replica correlation detection

Pamukkale University Journal of Engineering Sciences ◽

10.5505/pajes.2019.06253 ◽

2020 ◽

Vol 26 (2) ◽

pp. 342-346

Author(s):

Eren Küren ◽

Akın Cellatoğlu

Keyword(s):

Phase Shift ◽

Error Analysis ◽

Gaussian Noise ◽

Additive White Gaussian Noise ◽

White Gaussian Noise ◽

Phase Shift Keying ◽

Binary Phase ◽

Shift Keying ◽

Binary Phase Shift Keying

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An Improved Dual Binary Phase-shift Keying Tracking Method for Standard BOC Signals

Proceedings of the 33rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2020) ◽

10.33012/2020.17599 ◽

2020 ◽

Author(s):

Chuhan Wang ◽

Yang Gao ◽

Xiaowei Cui ◽

Mingquan Lu

Keyword(s):

Phase Shift ◽

Phase Shift Keying ◽

Tracking Method ◽

Binary Phase ◽

Shift Keying ◽

Binary Phase Shift Keying

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Performance Comparison between DPSK and OQPSK modulation approaches in multi environments channels with Matlab Simulink models

Wasit Journal of Engineering Sciences ◽

10.31185/ejuow.vol7.iss1.112 ◽

2019 ◽

Vol 7 (1) ◽

pp. 30-39

Author(s):

Fatima faydhe Al- Azzawi ◽

Faeza Abas Abid ◽

Zainab faydhe Al-Azzawi

Keyword(s):

Phase Shift ◽

Fading Channels ◽

Additive White Gaussian Noise ◽

Block Codes ◽

Performance Comparison ◽

Phase Shift Keying ◽

Differential Phase Shift ◽

Matlab Simulink ◽

Communication Industry ◽

Shift Keying

Phase shift keying modulation approaches are widely used in the communication industry. Differential phase shift keying (DPSK) and Offset Quadrature phase shift keying (OQPSK) schemes are chosen to be investigated is multi environment channels, where both systems are designed using MATLAB Simulink and tested. Cross talk and unity of signals generated from DPSK and OQPSK are examined using Cross-correlation and auto-correlation, respectively. In this research a proposed system included improvement in bit error rate (BER) of both systems in the additive white Gaussian Noise (AWGN) channel, by using the convolutional and block codes, by increasing the ratio of energy in the specular component to the energy in the diffuse component (k) and the diversity order BER in the fading channels will be improved in both systems.

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Application of Ultra Narrow Band Modulation in Enhanced Loran System

Sensors ◽

10.3390/s21134347 ◽

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.

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