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Safety-critical wireless sensor networks under a polyphase spreading sequences scenario
2017
Turkish Journal of Electrical Engineering and Computer Sciences
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Through an extensive simulation, it is found that upon applying polyphase sequences, the chip errors are reduced to 2.94 × 10 −6 in comparison to 1.18 × 10 −5 of conventional binary sequences (PN sequences ...
In this paper, polyphase sequences are employed at the physical layer of IEEE Standard 802.15.4 to enhance the communication reliability of wireless sensor networks. ...
ZC sequences have lower side lobe peaks of AACF in comparison to binary sequences, which make them highly energy-efficient and also allow them to have high values of merit factor. ...
doi:10.3906/elk-1605-307
fatcat:qci3ybvkf5hfbcqoqtruy2keii
Novel polyphase training sequence based synchronization estimator for OFDM
2011
2011 National Conference on Communications (NCC)
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A DFT spread modified polyphase training sequence is proposed which has better merit factor and peak to average power ratio. ...
The CRLB expressions in closed form for these two estimators are also presented under the assumption of strict decoupling of timing and frequency offsets. ...
CONCLUSION This paper proposes a novel DFT spread polyphase training sequence which has better merit factor and PAPR. ...
doi:10.1109/ncc.2011.5734711
fatcat:d25ueuvvdjax3fbc7wk7gom2hm
Optimizing Polyphase Sequences for Orthogonal Netted Radar
2006
IEEE Signal Processing Letters
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A new set of polyphase sequences is presented with good correlation properties as well as resilience to Doppler shifts. ...
Cross entropy (CE) technique is used to optimize the sequences. Correlation and Doppler results are compared with best-known sequences on various merit factors and shown to be superior. ...
Fig. 2 shows a comparison of Doppler properties for a CE sequence and a Deng sequence of same length of 128. ...
doi:10.1109/lsp.2006.877143
fatcat:km2kfydqizglxpu6qn3w7gs2fy
Minimization of Channel Impulse Noise using Digital Smear Filter
2013
Journal of Communications
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The paper describes a digital smear-desmear technique (SDT) based on polyphase multilevel sequences of unlimited length with good autocorrelation properties. ...
A design procedure for digital implementation of SDT is defined and sequences with power efficiency higher than 50% are generated. ...
The smearing filter design based on these sequences achieves an improvement of 7.78 dB in merit factor F 2 relative to the design based on binary sequences for the sequence length of 200. ...
doi:10.12720/jcm.8.2.82-90
fatcat:7ri76som4ne4xb33ux7ogicmnu
Optimization methods for solving the low autocorrelation sidelobes problem
2016
2016 17th International Radar Symposium (IRS)
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In this paper, a discussion is made on the optimization methods that can solve the low autocorrelation sidelobes problem for polyphase sequences. ...
This paper starts with a description and a comparison of two algorithms that are commonly used in the literature: a stochastic method and a deterministic one (a gradient descent). ...
This energy quantifies the autocorrelation sidelobe level of a sequence, like the Merit Factor introduced by Golay [1] . ...
doi:10.1109/irs.2016.7497323
fatcat:a65cabszzrfn3kbetlkvwhnbxi
Design of Ternary Codes for Various Lengths using MSAA
2015
International Journal of Computer Applications
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Sequences with good discriminating and merit factor are useful for channel estimation, radar and spread spectrum communication application. ...
The design of ternary codes with good merit factor and discriminating factor can be considered as a nonlinear multivariable mathematical problem which is difficult find a optimal solution. ...
Ternary sequence (TSs) eliminates the drawbacks of the binary and polyphase sequences. Generally TSs has good merit factors at all length. ...
doi:10.5120/20340-2130
fatcat:ormh4jwsmfbohlucl3rjpqygyq
Design and Implementation of the Ternary Sequences with Good Merit Factor Values
2014
International Journal of Computer Applications
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The pulse compression codes with low autocorrelation sidelobe levels and high Merit Factor (MF) are useful in radar, channel estimation and spread spectrum communication applications. ...
One of the main criteria of good pulse compression is MF. A sequence with high MF can be considered as best sequence. ...
sequence Vs Merit Factor Fig .13 ACF of synthesized ternary sequence of length 31
Table . 1 . ...
doi:10.5120/16035-4721
fatcat:wjnip5sxcrcuhdlvg5kukrscii
Modified Walsh-Hadamard sequences for DS CDMA wireless systems
2002
International Journal of Adaptive Control and Signal Processing
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functions, merit factor or other properties of the sequence set. ...
The proposed method can be applied to obtain bipolar, quadri-phase, or general polyphase sequences. ...
Another important parameter used to assess the synchronization amiability of the spreading sequence } { ) (i n s is a merit factor, or a figure of merit [15] , which specifies the ratio of the energy ...
doi:10.1002/acs.727
fatcat:uryztyoi6jabhdxwdq4gskuzxi
Bi-alphabetic pulse compression radar signal design
2000
Sadhana (Bangalore)
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Ternary sequences have superior merit factors but they cannot be transmitted with existing technology. ...
It is proposed that a ternary sequence be coded into a binary sequence for the purpose of transmission. ...
This idea is based on earlier work (Moharir et al 1997) that employed Hamming scan and back-tracking algorithms for obtaining the ternary sequences with high merit factor. ...
doi:10.1007/bf02703629
fatcat:n27u2wehw5b45k7pt45v5gt5ea
Generation and Implementation of Barker and Nested Binary codes
2013
IOSR Journal of Electrical and Electronics Engineering
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DSP's are used for implementing many of the radar applications. FPGA based implementation of Barker and Nested binary codes are presented and are suitable for real time applications. ...
The synthesized binary sequences have good MF values compared with previous work in the literature. ...
Merit Factor (MF): Merit factor, F, is defined as the ratio of energy in the mainlobe of Auto Correlation Function to the total signal energy in sidelobes. (3)
IV. ...
doi:10.9790/1676-0823341
fatcat:zqwwnnh4o5dvdkkwfctkq4dclm
Polyphasic taxonomy, a consensus approach to bacterial systematics
1996
Microbiological reviews
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ACKNOWLEDGMENTS We are indebted to the Commission of the European Communities ...
Comparisons of the 16S and 23S rRNA sequences revealed the phylogenetic framework of bacterial classification and became indispensable in polyphasic taxonomy. ...
The classification of new or unusual isolates will, however, often require a polyphasic approach. ...
doi:10.1128/mr.60.2.407-438.1996
fatcat:3krgol5mbzarlgfbuylkh62ng4
Polyphasic taxonomy, a consensus approach to bacterial systematics
1996
Microbiological reviews
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ACKNOWLEDGMENTS We are indebted to the Commission of the European Communities ...
Comparisons of the 16S and 23S rRNA sequences revealed the phylogenetic framework of bacterial classification and became indispensable in polyphasic taxonomy. ...
The classification of new or unusual isolates will, however, often require a polyphasic approach. ...
doi:10.1128/mmbr.60.2.407-438.1996
fatcat:q65ubpitwzcwhbssrzvcitydjm
Low Complexity Transceiver Design for FBMC-OQAM System for Future Generation Wireless Communication
2020
J of Electrical Engineering
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The new structure depends on the application of the filter bank in the frequency domain instead of the time domain. ...
Simulation results were performed by analyzing the number of multiplication and addition operations, in addition to studying the performance of the FBMC-OQAM system of the new structure by simulating the ...
While in the proposal a new design and prototyping experience of an advanced communication system was based on FBMC-OQAM modulation. ...
doi:10.17265/2328-2223/2020.01.004
fatcat:vg4wjoubkjaaljvhxsj6s4cyzi
Page 4298 of Mathematical Reviews Vol. , Issue 2004e
[page]
2004
Mathematical Reviews
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Next, d is specialized to equal | and the periodic merit factor M, = SEs are ir(s)|? is evaluated as L?/(3(L—1)). ...
Baptista proposed a new approach to using chaos in digital cryptography, creating a new category of ciphers, which are called by some authors “searching-based chaotic ci- phers”. ...
Polyphasic taxonomy, a consensus approach to bacterial systematics
1996
Microbiological reviews
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This polyphasic taxonomy takes into account all available phenotypic and genotypic data and integrates them in a consensus type of classification, framed in a general phylogeny derived from 16S rRNA sequence ...
An evaluation of our present insights, the conclusions derived from it, and the perspectives of polyphasic taxonomy are discussed, emphasizing the keystone role of the species. ...
ACKNOWLEDGMENTS We are indebted to the Commission of the European Communities ...
pmid:8801440
pmcid:PMC239450
fatcat:lg7ns5vdkbaqpklz4dnkoozc5y
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