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A Novel Guard Interval Approach for NFDM Transmission
CLEO 2023, 2023A novel reduced-complexity scheme of guard interval based on cyclic extension for NFDM system with continuous spectrum is introduced, increasing the transmission reach by 300 km for 16QAM signal and 100 km for 32QAM.
Yutian Wang +9 more
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Efficient guard interval reduction for coherent optical OFDM
Optical Fiber Communication Conference, 2014We propose an efficient dispersion compensation to reduce the guard interval in coherent optical-orthogonal frequency division multiplexing (CO-OFDM) systems. The proposed algorithm compensates dispersion using overlapped frequency domain equalizer (OFDE), timing offset at the transmitter. Simulations verify the validity of the proposed algorithm.
Hae Young Rha +2 more
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Spectral Precoding for OFDM without Guard Interval Insertion
2016 IEEE 83rd Vehicular Technology Conference (VTC Spring), 2016In this paper, the orthogonal frequency-division multiplexing signal without inserting guard subintervals (NG-OFDM) is considered and combined with spectral precoding to achieve high spectrum compactness. In order to reject interblock interference among received NG-OFDM blocks over dispersive channels, a guard subinterval in each received block is ...
Char-Dir Chung, Kuo-Wei Chen
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Totally blind channel identification by exploiting guard intervals
Systems & Control Letters, 2003zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jonathan H. Manton, Walter D. Neumann
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Single Carrier Block Transmission Without Guard Interval
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006This paper proposes a simple detection scheme for a single carrier block transmission (SCBT) without guard interval (GI). Although the SCBT without the GI can significantly increase bandwidth efficiency, the received signal suffers from inter-block interference (IBI) and inter-symbol interference (ISI), which cannot be effectively equalized by a ...
Kazunori Hayashi, Hideaki Sakai
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A Waveform for 5G: Guard Interval DFT-s-OFDM
2015 IEEE Globecom Workshops (GC Wkshps), 2015Delay spread can be detrimental to communication systems. Orthogonal Frequency Division Multiplexing (OFDM)/Discrete Fourier Transform-spread-OFDM (DFT-s- OFDM) based systems (for e.g., Long Term Evolution (LTE), WiFi, etc.) tackle delay spread by adding a cyclic prefix (CP) before the start of the OFDM symbol.
Utsaw Kumar +3 more
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Perfect equalization for DMT systems without guard interval
IEEE Journal on Selected Areas in Communications, 2002We propose a new, low-complexity frequency-domain equalizer for discrete multitone (DMT) systems, which, in the absence of a guard interval, utilizes existing redundancy in the frequency-domain to completely eliminate intersymbol and interchannel interference.
Trautmann, Steffen, Fliege, Norbert J.
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New OFDM system without guard interval
2009 Digest of Technical Papers International Conference on Consumer Electronics, 2009This paper proposes a new OFDM system without a guard interval (GI) based on the useful characteristics of IFFT operation. The system utilizes the pilot signal to capture the channel information as well as GI does. Therefore, the bandwidth efficiency of the system can be improved.
null Yafei Hou, Tomohiro Hase
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An adaptive OFDM system with variable guard interval
SPIE Proceedings, 2004Symbol guard interval is almost indispensable to deal with ISI caused by channel delay spreading in wireless OFDM transmission systems. However, the length of guard interval is usually fixed in conventional OFDM system, which decreases the power and spectrum efficiency considerably, especially in a mobile environment.
Lifeng Lai +4 more
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Chained Turbo Equalization for Block Transmission without Guard Interval
2010 IEEE 71st Vehicular Technology Conference, 2010This paper proposes chained turbo equalization (CHATUE) algorithm, a simple detection scheme for block transmission without guard interval (GI), where turbo equalizers for the several consecutive frames exchange information about the interference components. Although the block transmission without GI can significantly increase bandwidth efficiency, the
Khoirul Anwar, Zhou Hui, Tad Matsumoto
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