Filters








49 Hits in 6.9 sec

Constant Modulus and Reduced PAPR Block Differential Encoding for Frequency-Selective Channels

Y. Larsen, G. Leus, G.B. Giannakis
2004 IEEE Transactions on Communications  
Index Terms-Block differential encoding, frequency-selective channels, orthogonal frequency-division multiplexing (OFDM), peak-to-average power ratio (PAPR).  ...  To mitigate these effects, we design a block differential encoding scheme over the subchannels that preserves multipath diversity, and in addition, results in constant modulus transmitted symbols.  ...  CONCLUSIONS We have in this paper designed a block differential encoding scheme that exploits the multipath diversity of a frequency-selective channel, and at the same time preserves the constant modulus  ... 
doi:10.1109/tcomm.2004.826413 fatcat:s5q3lwb3uzfqzj4xtujry6xi5q

Neutrosophic data formation using Gaussian filter based costas coding for wireless communication systems

A.S. Ajith, T. Latha
2019 Zenodo  
Outstanding advantages of OFDM helps high data rate communication systems such as Digital Video Broadcasting (DVB) and mobile worldwide interoperability for microwave access (mobile Wi-MAX).  ...  But, OFDM system grieves from grave issue of high PAPR.  ...  In OFDM, the constant envelope peak and multipath propagation produce fading in a frequency selective channel permitting operation without an equalizer especially when differential data encoding is used  ... 
doi:10.5281/zenodo.3077232 fatcat:tvethqigzrcw7mkfrmspbzp2yy

Neutrosophic data formation using Gaussian filter based costas coding for wireless communication systems

A.S. Ajith, T. Latha
2019 Cognitive Systems Research  
Consequently; the signal can assume to fade in a frequency selective channel without an equalizer.  ...  In order to make Neutrosophic data for less PAPR criteria, Gaussian filter based Costas coding is proposed.  ...  In OFDM, the constant envelope peak and multipath propagation produce fading in a frequency selective channel permitting operation without an equalizer especially when differential data encoding is used  ... 
doi:10.1016/j.cogsys.2018.09.030 fatcat:veko4trfznc2zcqlmw7a2rx6pm

Adaptive Pre/Post-Compensation of Cascade Filters in Coherent Optical Transponders

Abdo, D'Amours
2020 Future Internet  
Additionally, other tangible system benefits of our method are listed and discussed.  ...  rate (BER) of 0.02 versus pre-compensation only in the linear and nonlinear operating region of fiber respectively.  ...  The latter is the core of the Rx and it is adaptive, where Constant Modulus Algorithm (CMA) and Least Mean Square (LMS) are examples of the adaptive method used [21] , to decouple the two polarizations  ... 
doi:10.3390/fi12020021 fatcat:zqxj25lqz5e6lf7lo4mobjuloa

Universal space-time coding

H. El Gamal, M.O. Damen
2003 IEEE Transactions on Information Theory  
The proposed framework subsumes many of the existing codes in the literature, extends naturally to time-selective and frequency-selective channels, and allows for more flexibility in the tradeoff between  ...  A universal framework is developed for constructing full-rate and full-diversity coherent space-time codes for systems with arbitrary numbers of transmit and receive antennas.  ...  ACKNOWLEDGMENT The authors are grateful to the anonymous reviewers for their helpful comments.  ... 
doi:10.1109/tit.2003.810644 fatcat:n3n3eppk7benzdcz57t6xl4jx4

Single-carrier frequency domain equalization

F. Pancaldi, G. Vitetta, R. Kalbasi, N. Al-Dhahir, M. Uysal, H. Mheidat
2008 IEEE Signal Processing Magazine  
of strategies for frequency diversity scheduling in multiuser communication systems.  ...  O rthogonal frequency division multiplexing (OFDM) has been recently adopted by major manufacturers and by standardization bodies for a wide range of wireless and wireline applications ranging from digital  ...  subcarriers are differentially encoded and noncoherent detection is employed.  ... 
doi:10.1109/msp.2008.926657 fatcat:ttxo64yqqretnhfecgmbww7jxm

Coded Modulation and Impairment Compensation Techniques in Optical Fiber Communication [chapter]

Zhipei Li, Dong Guo, Ran Gao
2021 Fiber Optics [Working Title]  
, pre-compensation and receiver side's DSP techniques designed for coherent systems are introduced.  ...  Probabilistic shaping is a new coded modulation technology, which can reduce transmission power by precoding, reduce bit error rate and improve communication rate.  ...  To process different shaped signals, a pre-convergence constant modulus algorithm with step of 2e-6 and taps of 9 followed by 1% pilot aided multimodulus algorithm are used for polarization demultiplexing  ... 
doi:10.5772/intechopen.98811 fatcat:5mkytzm6mfflnnr6bo32mg4e74

Radio Resource Management in Joint Radar and Communication: A Comprehensive Survey [article]

Nguyen Cong Luong, Xiao Lu, Dinh Thai Hoang, Dusit Niyato, Dong In Kim
2021 arXiv   pre-print
., spectrum and energy, reduce the system size, and minimize the system cost. However, there are several challenges to be solved for the JRC design.  ...  Then, we review and analyze resource management approaches, i.e., spectrum sharing, power allocation, and interference management, for JRC.  ...  The OTFS technique enables data symbols to experience a near-constant channel gain even for the channels with high Doppler frequencies, massive MIMO, or at high frequencies such as mmWave.  ... 
arXiv:2007.13146v3 fatcat:aq5ti5uruvgczpfcrtulcfehf4

Design Guidelines for Spatial Modulation

Ping Yang, Marco Di Renzo, Yue Xiao, Shaoqian Li, Lajos Hanzo
2015 IEEE Communications Surveys and Tutorials  
It constitutes a 12 promising transmission candidate for large-scale MIMO design 13 and for the indoor optical wireless communication while relying 14 on a single-Radio Frequency (RF) chain.  ...  ., the antenna indices) as an 8 additional dimension invoked for transmitting information, apart 9 from the traditional Amplitude and Phase Modulation (APM).  ...  See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.  ... 
doi:10.1109/comst.2014.2327066 fatcat:xmlb5xvnbbdpvl24wnjkovmpwq

Information Theory of Underspread WSSUS Channels [chapter]

Giuseppe Durisi, Veniamin I. Morgenshtern, Helmut Bölcskei, Ulrich G. Schuster, Shlomo Shamai (Shitz)
2011 Wireless Communications Over Rapidly Time-Varying Channels  
In this model, the channel is taken to be constant over a given time interval, called block, and assumed to change independently from one such block to the next.  ...  The independence assumption across blocks can be justified, e.g., for systems employing frequency hopping or if the data symbols are interleaved.  ...  The underlying reason is that in constant modulus signals, the information is encoded in the phase of the signal.  ... 
doi:10.1016/b978-0-12-374483-8.00002-9 fatcat:bgdsrfubbfcmrglyjkkgrlx7ke

2013 Index IEEE Signal Processing Letters Vol. 20

2013 IEEE Signal Processing Letters  
Departments and other items may also be covered if they have been judged to have archival value. The Author Index contains the primary entry for each item, listed under the first author's name.  ...  The primary entry includes the coauthors' names, the title of the paper or other item, and its location, specified by the publication abbreviation, year, month, and inclusive pagination.  ...  ., +, LSP July 2013 705-708 Frequency division multiple access Constant Modulus Algorithm for Peak-to-Average Power Ratio (PAPR) Reduction in MIMO OFDM/A.  ... 
doi:10.1109/lsp.2013.2291126 fatcat:pe3e4vel6bhjze7qeapf7eml5e

100G and Beyond Transmission Technologies for Evolving Optical Networks and Relevant Physical-Layer Issues

Ezra Ip, Philip Ji, Eduardo Mateo, Yue-Kai Huang, Lei Xu, Dayou Qian, Neng Bai, Ting Wang
2012 Proceedings of the IEEE  
functions previously handled poorly by optical analog hardware such as spectrum shaping and demultiplexing of optical channels.  ...  The authors outline technologies that are enabling next-generation optical fiber communication systems with channels that support 100-Gb/s and higher rates.  ...  The TDE coefficients can thereafter be adapted using any commonly used algorithm for single-carrier systems such as constant modulus algorithm (CMA) or decision-directed algorithm (DD) [68] .  ... 
doi:10.1109/jproc.2012.2183329 fatcat:hfaa4eq7lzey7g4w7hi6wboyqu

ANTS 2020 Program

2020 2020 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS)  
The selected cluster of transmit antennas will encode the input symbol-stream with the help of generalized orthogonal space-time block codes to provide full diversity order.  ...  The channel model considered at mmWave carrier frequencies is the clustered Rician fading channel, which has few multipaths.  ...  The constant modulus cost function formulated using RMLA is used for modelling the equalizer to adaptively suppress the influence of the impulsive noise.The effectiveness of the proposed RMLA based impulse  ... 
doi:10.1109/ants50601.2020.9342833 fatcat:ldgs2gnywnagpjk7sza6edc44e

2019 Index IEEE Transactions on Signal Processing Vol. 67

2019 IEEE Transactions on Signal Processing  
., +, TSP Feb. 1, 2019 622-637 Joint Channel-Estimation/Decoding With Frequency-Selective Channels and Few-Bit ADCs.  ...  ., +, TSP Dec. 1, 2019 5893-5908 Joint Channel-Estimation/Decoding With Frequency-Selective Channels and Few-Bit ADCs.  ... 
doi:10.1109/tsp.2020.2968163 fatcat:dvvpqntb2rc2bjed5nnk4xora4

Interference Exploitation via Symbol-Level Precoding: Overview, State-of-the-Art and Future Directions [article]

Ang Li, Danilo Spano, Jevgenij Krivochiza, Stavros Domouchtsidis, Christos G. Tsinos, Christos Masouros, Symeon Chatzinotas, Yonghui Li, Branka Vucetic, Björn Ottersten
2019 arXiv   pre-print
Proof-of-concept testbeds are demonstrated for the potential practical implementation of CI precoding, and finally a list of open problems and practical challenges are presented to inspire and motivate  ...  The definition for CI is presented and the corresponding mathematical characterization is formulated for popular modulation types, based on which optimization-based precoding techniques are discussed.  ...  Some other works include CEP for frequency-selective channels in [236] , a joint transceiver design for CEP in a point-to-point (P2P) MIMO system in [237] , CEP for MISO multicasting in [238] , [239  ... 
arXiv:1907.05530v1 fatcat:ozoc4mlk4bhwtnslxyaw6ybw7m
« Previous Showing results 1 — 15 out of 49 results