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Performance Evaluation of Adaptive Modulation Based MC-CDMA System
2013
Wireless Engineering and Technology
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In this paper, adaptive modulation based M-ary QAM, M-PSK and M-ary CPM systems applied to a MC-CDMA system in Rayleigh fading channel environment have been investigated and BER performances of all these ...
Adaptive modulation, in conjunction with MC-CDMA transmission system is very assuring way to increase data rate. ...
) channel which is characterized by a constant signal to noise ratio. ...
doi:10.4236/wet.2013.41008
fatcat:4rfomksonvhr7hww5opdckm6ru
High resolution time of arrival estimation for a cooperative sensor system
2010
Advances in Radio Science
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To compensate this resolution problem the combination of a pseudo-noise coded pulse compression system with superresolution time of arrival estimation is proposed. ...
Due to the lack of available signal bandwidth the measurement accuracy degrades especially in multipath scenarios. ...
For the pedestrian protection system the MUSIC algorithm was chosen because of its superior performance even with low SNR. noise require a high Signal to Noise Ratio (SNR). ...
doi:10.5194/ars-8-61-2010
fatcat:rduifijv7bafxlo4c3hnzepyoq
A Plug and Play Module to identify type of Modulation
2017
International Journal of Engineering and Technology
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The main goal of this work is to identify the type of modulation in an independent manner with the use of plug and play module. ...
adaptively changing the modulation mode based on the channel quality information sensed by the receiver and fed back to the transmitter to the throttling of the window size by the sender. ...
The signal to noise ratio is given by SNR ( 7 ) Where, S is the desired signal power and N -1 is the number of interfering users The signal to noise ratio at the base station receiver can be represented ...
doi:10.21817/ijet/2017/v9i4/170904062
fatcat:w2g3owsctffmlbtcxf53kltpxm
FSK Demodulation and Bit String Extraction: A Python-Centric Approach in SDR Systems
[article]
2024
arXiv
pre-print
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Frequency Shift Keying (FSK) modulation is widely utilized in various communication systems for data transmission due to its simplicity and robustness. ...
In this paper, we present a Python-centric approach for demodulating FSK signals and extracting bit strings in Software Defined Radio (SDR) systems. ...
We evaluated the performance of our approach under various conditions, including different signal-to-noise ratios (SNRs), modulation indices, and symbol rates. ...
arXiv:2402.17777v1
fatcat:o3tzz4s6vzco3dct75ttgpuose
Improvement of the ultrasonic testing method for materials with significant attenuaton
2018
Eastern-European Journal of Enterprise Technologies
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signal/noise ratio of the input signal (η in ). ...
Improved phase method for detecting UTM signals using adaptive median filtration In order to reduce a signal/noise ratio (at which it is possible to detect echo impulses), it is expedient to include a ...
We applied the basic method and two improved UMT methods to the formed signal and determined r statistics for each method. 3. 3. ...
doi:10.15587/1729-4061.2018.122858
fatcat:7dvsdysvgjblhftxroh5w3b6iu
New Adaptive Data Transmission Scheme Over HF Radio
2008
˜Al-œKhawarizmi engineering journal
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This is based on measuring SINAD (Signal plus Noise plus Distortion to Noise plus Distortion), RSL (Received Signal Level), multipath phase distortion and BER (Bit Error Rate) for each channel in the frequency ...
Acceptable Bit Error rate can be maintained by adapting some of the design parameters such as modulation, symbol rate, constellation size, and transmit power according to the channel state. ...
Table 4 shows the signal to noise ratio boundaries for best utilization of bandwidth with minimum signal to noise ratio. ...
doaj:c132ca6d660440aa9407a2de420ea027
fatcat:sqezp7vzrfhrtano5hzq4rmxsa
PERFORMANCE ANALYSIS OF UPLINK ADAPTATION IN EUTRAN
2017
Communications
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We measure different KPIs such as inter-cell interference, signalto-interference noise ratio (SINR), reference signal received power (RSRP), throughput, spectral efficiency and power spectral density ( ...
Furthermore, for the optimal solution in CLUPC, we tuned the value of the compensation factor (α) to meet the trade-off between high UL throughput and SINR. ...
Signal-to-Interference Noise Ratio DL The DL SINR (γ) is the ratio of desirable DL power (eNB towards UE) for each radio block (RB) resource with all received signal power, including noise or interfering ...
doi:10.2316/journal.214.2017.5.214-1081
fatcat:7rumewuqqjc47h7hzlclwygfhu
NNGD algorithm for neural adaptive filters
2000
Electronics Letters
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It is important to mention that the design of nonlinear maximally decimated decomposition schemes is still an open problem. ...
However, we believe that, although we have presented just a heuristic approach to such a design, its strength lies in the fact that it opens new research possibilities towards finding more effective design ...
Experimentally we chose a threshold value of Th = 0.9 in that, observing the output of the post-processing module for several types of background noise and different signal-to-noise ratios, it was rarely ...
doi:10.1049/el:20000631
fatcat:cc7plltjmreqdgqio7hhf6dtcy
Adaptive demodulation using rateless erasure codes
2006
IEEE Transactions on Communications
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We prove the optimality of the proposed decision regions in selecting the most likely subset of bits from any received symbol in moderate-to-high signal-to-noise ratios, and we analyze the performance ...
We demonstrate that pre-encoding the data with a Raptor code allows for simple reconstruction of the message, regardless of the erasure pattern introduced from the nondemodulated bits. ...
ACKNOWLEDGMENT The authors would like to thank F. Kschischang for his insightful comments regarding this work. As well, the authors wish to thank the anonymous reviewers for their helpful suggestions. ...
doi:10.1109/tcomm.2006.881236
fatcat:qspw6hdgnfeqlizuisldnkru4y
Combining Admission and Modulation Decisions for Wireless Embedded Systems
2016
2016 IEEE 19th International Symposium on Real-Time Distributed Computing (ISORC)
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Even less attention has been paid to formal methods for assessing how combinations of aspects may influence communication performance, and how to characterize, adapt to, and exploit their combined effects ...
To overcome these limitations of the current state of the art, this paper makes three main contributions to wireless communication for distributed embedded systems with QoS constraints. ...
Signal-to-Noise Ratio Finally, we investigate the impact of signal-to-noise ratio by comparing Figure 2 , which has an SNR of 2.0, with Figures 8 and 9 , which increase the SNR, first to 4.0 and then ...
doi:10.1109/isorc.2016.19
dblp:conf/isorc/MeierGC16
fatcat:hukjppz5zbhcrjrywawgngi7nu
Enhancement of DVB-S2 Network Stability and Performance for Mobile User Groups
2015
Journal of Applied Sciences
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This study presented DVB-S2 capabilities of handling mobility issues specifically on mobile platforms including the simulation of Adaptive Coding Modulation (ACM), atmospheric effects and noisy channels ...
The DVB-S2 describes the methods in which the data is framed, encoded and modulated for transmission over a satellite channel. The DVB-S2 comes from the same family of DVB-S with robust features. ...
According to the results, shown in Fig. 2-5 , the main importance of power control was that it kept the Signal to Noise Ratio (SNR) point constant in the given mode of ACM. ...
doi:10.3923/jas.2015.1184.1189
fatcat:cywnl33opjhdhol65ychqs5sn4
Performance analysis of adaptive M-QAM over a flat-fading Nakagami-m channel
2011
South African Journal of Science
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Channel adaptive M-ary quadrature amplitude modulation (M-QAM) schemes have been developed to provide higher average link spectral efficiency by taking advantage of the timevarying nature of wireless fading ...
Much of the earlier work on such schemes uses the assumption that thresholds designed for additive white Gaussian noise (AWGN) channels can be directly applied to slowly varying block-fading channels. ...
Acknowledgements We thank Professor Guiseppe Abreu who made the code to simulate his proposed system available on his website along with his papers. ...
doi:10.4102/sajs.v107i1/2.122
fatcat:lbtzqejuenggplrb3omlvbgcym
A Study on Effective Dimming Control Scheme Using Optical Spreading Codes in Visible Light Communication
2016
International Journal of Control and Automation
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Also, in the case of 8B/10B block codes, even if an error occurs in only one code in an encoded code block, it can be decoded into the bit stream of a completely different block in the decoding process ...
In IEEE 802.15.7 VLC standard, on-off keying (OOK) and variable pulse position modulation (VPPM) are defined as pulse modulation schemes for dimming control. ...
OOK modulation with Manchester codes), regardless of the input ratio of 0 to 1 bits. ...
doi:10.14257/ijca.2016.9.12.29
fatcat:eefrj7d7b5cvpmkv7pewcyoayu
Performance of Signal-to-Noise Ratio Estimator with Adaptive Modulation
2012
2012 Sixth Asia Modelling Symposium
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Accordingly, a communication link which adapts the degree of modulation scheme according to the estimated signal-to-noise ratio (SNR) values is proposed. ...
In order for adaptive modulation to work correctly, it requires an accurate estimation of the channel condition at the receivers' end to make decisions and take action. ...
Adaptive modulation and coding (AMC) allows the communication system to adjust the data rate, transmit power, instantaneous BER, and channel code rate to overcome the noise and fading effects [3, 4] . ...
doi:10.1109/ams.2012.40
dblp:conf/asiams/LyeAYLT12
fatcat:rd6i3a667zbb3nd5wxh7sp3ype
Feature Extraction of Bearing Weak Fault Based on Sparse Coding Theory and Adaptive EWT
2022
Applied Sciences
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In industry, early fault signals of rolling bearings are submerged in strong background noise, causing a low signal-to-noise ratio (SNR) and difficult diagnosis. ...
As the morphological parameters of the Laplace wavelet dictionary and sparse coefficients are not easy to obtain, this method uses the adaptive empirical wavelet transform (AEWT) to determine the morphological ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/app122110807
fatcat:745uprrgzbembjirzzesoz5rcy
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