Comparative study of DCT-and DHT-based OFDM systems over doubly dispersive fading channels
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Sherif A. Elshawadfy
Abstract
In high-mobility operating scenarios orthogonal frequency division multiplexing (OFDM) system lacks its optimality, intercarrier interference (ICI) occurs and the Doppler shifts deteriorate the orthogonality of the subcarriers. However, this problem can be overcome by utilizing complicated equalizers at the receiver. Discrete cosine transform (DCT) and discrete Hartley transform (DHT) have been used instead of discrete Fourier transform (DFT) in the standard OFDM system. The performance results achieved enhancement over dispersive selective channels that cannot be accomplished with a standard OFDM system, even with utilizing complex equalizers. In this paper, the performance of the DCT-based OFDM system and DHT-based OFDM system is compared and analyzed with respect to DFT-based OFDM system performance over doubly dispersive fading channel at various Doppler shifts, the block diagrams of the proposed systems are provided to simplify the theoretical analysis by making it easier to follow. Simulation results emphasized that the performance of DCT and DHT-based OFDM systems under doubly dispersive fading conditions scenario outperforms DFT-based OFDM system of order 3 dB energy per bit to noise power spectral density ratio (Eb/N0).
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: Not applicable.
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© 2024 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Amplifiers
- Detailed scrutiny of FWM in holmium-doped fiber amplifier (HOFA) in WDM systems
- A double clad ASE Re-injected hybrid TDFA and HDFA amplifier with ±1.44 dB GF
- Detectors
- Performance parameters estimation of high speed Silicon/Germanium/InGaAsP avalanche photodiodes wide bandwidth capability in ultra high speed optical communication system
- Devices
- Performance study of microwave photonic links by considering the effect of phase shifters and bias conditions on dual-drive dual parallel Mach–Zehnder modulator
- Fibers
- High birefringence low loss nearly zero flat dispersion similar to slotted core photonic crystal fibers
- Comparative analysis of high index core micro structured optical fibers (HIMSOF) and hollow core band gap fibers (HCBGF) performance efficiency in fiber communication system
- Management of lateral misalignment loss and total insertion loss with beam waist control in high contrast single mode coupling fibers
- Networks
- Enabling ultra-high bit rate transmission with CFBG as dispersion compensator in an OptiSpan 240 km DWDM network
- Performance and energy efficiency enhancement of existing optical communication systems by incorporating resource allocation on demand technique in FiWi networks
- A fiber-wireless integration approach in WDM-PON architecture, boosted with polarization multiplexing and optical frequency comb source
- Optimizing Fi-Wi network performance through advanced multiplexing techniques: a comparative analysis for enhanced quality metrics
- Synergizing intelligent signal processing with wavelength-division multiplexing for enhanced efficiency and speed in photonic network communications
- Systems
- Simulation design for Ro-FSO communications system by digital modulation schemes
- Implementing green optical waveform system using hybrid cognitive methods for QAM transmission scheme
- MZM–SOA based RoF system for 30-tuple millimeter-wave generation
- Hybrid optical-electronic compensation of fiber nonlinearity for long-haul coherent optical transmission
- High speed operation efficiency of doped light sources with the silica-doped fiber channel for extended optical fiber system reach
- Relative intensity noise management and thermal/shot noise control for high speed ultra high bandwidth fiber reach transmission performance
- Simulative analysis of carrier suppressed return to zero based symmetrical compensated optical link
- A combination of DST precoder and ICF based-methods for PAPR suppression in OFDM signal
- Evaluating the effectiveness of various diversity and combining techniques on an RF-FSO link
- Comparative study of DCT-and DHT-based OFDM systems over doubly dispersive fading channels
- Design and performance of WDM system for high-speed optical communication on different modulation formats
- Transmission of data rate by radio over free space optical communications system under turbulence conditions
- Implementation of companding scheme for performance enhancement of optical OFDM structure
- Theory
- High thermal stability and high-performance efficiency capability of light sources–based rate equation models in optical fiber transmission systems
Artikel in diesem Heft
- Frontmatter
- Amplifiers
- Detailed scrutiny of FWM in holmium-doped fiber amplifier (HOFA) in WDM systems
- A double clad ASE Re-injected hybrid TDFA and HDFA amplifier with ±1.44 dB GF
- Detectors
- Performance parameters estimation of high speed Silicon/Germanium/InGaAsP avalanche photodiodes wide bandwidth capability in ultra high speed optical communication system
- Devices
- Performance study of microwave photonic links by considering the effect of phase shifters and bias conditions on dual-drive dual parallel Mach–Zehnder modulator
- Fibers
- High birefringence low loss nearly zero flat dispersion similar to slotted core photonic crystal fibers
- Comparative analysis of high index core micro structured optical fibers (HIMSOF) and hollow core band gap fibers (HCBGF) performance efficiency in fiber communication system
- Management of lateral misalignment loss and total insertion loss with beam waist control in high contrast single mode coupling fibers
- Networks
- Enabling ultra-high bit rate transmission with CFBG as dispersion compensator in an OptiSpan 240 km DWDM network
- Performance and energy efficiency enhancement of existing optical communication systems by incorporating resource allocation on demand technique in FiWi networks
- A fiber-wireless integration approach in WDM-PON architecture, boosted with polarization multiplexing and optical frequency comb source
- Optimizing Fi-Wi network performance through advanced multiplexing techniques: a comparative analysis for enhanced quality metrics
- Synergizing intelligent signal processing with wavelength-division multiplexing for enhanced efficiency and speed in photonic network communications
- Systems
- Simulation design for Ro-FSO communications system by digital modulation schemes
- Implementing green optical waveform system using hybrid cognitive methods for QAM transmission scheme
- MZM–SOA based RoF system for 30-tuple millimeter-wave generation
- Hybrid optical-electronic compensation of fiber nonlinearity for long-haul coherent optical transmission
- High speed operation efficiency of doped light sources with the silica-doped fiber channel for extended optical fiber system reach
- Relative intensity noise management and thermal/shot noise control for high speed ultra high bandwidth fiber reach transmission performance
- Simulative analysis of carrier suppressed return to zero based symmetrical compensated optical link
- A combination of DST precoder and ICF based-methods for PAPR suppression in OFDM signal
- Evaluating the effectiveness of various diversity and combining techniques on an RF-FSO link
- Comparative study of DCT-and DHT-based OFDM systems over doubly dispersive fading channels
- Design and performance of WDM system for high-speed optical communication on different modulation formats
- Transmission of data rate by radio over free space optical communications system under turbulence conditions
- Implementation of companding scheme for performance enhancement of optical OFDM structure
- Theory
- High thermal stability and high-performance efficiency capability of light sources–based rate equation models in optical fiber transmission systems
