Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 10 of 10 for “"Multicarrier systems"”.
-
Reliable and Low-Complexity Multicarrier Systems
… a variety of novel reliable and low-complexity multicarrier systems based on index modulation (IM) and deep learning (DL) techniques, particularly tailored to mission-critical MTC applications, such as industrial automation. By integrating the IM concept into the OFDM framework, the resulting …
-
SPECTRALLY EFFICIENT MULTICARRIER SYSTEMS FOR FIBER-OPTIC TRANSMISSION
… a comprehensive study of spectrally efficient multicarrier systems for fiber-optic transmission. Multicarrier optical systems partition a high-data rate digital signal in a wavelength channel into multiple subcarriers. The data rate on each subcarrier can be sufficiently low and thus, the …
-
Sistemas de transmissão multiportadora aplicados em um canal acústico submarino na presença de efeito doppler
… an analysis of feasibility of the application of multicarrier transmission application in acoustic communication systems for underwater environment. Such analysis encompass (Single-Carrier Frequency Division Multiple Access) SC-FDMA, (Orthogonal Frequency Division Multiplexing) OFDM and (Frequency …
-
Null power reallocation for data rate improvement in a wireless multicarrier system
Multicarrier systems are advantageous for high data rate transmissions in wireless environments due to their ease of implementation and tolerance for multipath delay spread. Currently, these systems as specified by the IEEE 802.11 standards do not adapt to frequency-selective fading but simply …
-
Multiband orthogonal frequency division multiplexing for ultra-wideband wireless communication: analysis, extensions and implementation aspects
Ultra-Wideband (UWB) wireless communication systems employ large bandwidths and low transmitted power spectral densities, and are suitable for operation as underlay systems which reuse allocated spectrum. The subject of this dissertation is Multiband Orthogonal Frequency Division Multiplexing …
-
Advanced MIMO-OFDM technique for future high speed braodband wireless communications. A study of OFDM design, using wavelet transform, fractional fourier transform, fast fourier transform, doppler effect, space-time coding for multiple input, multiple output wireless communications systems
… high speed mobile wireless communications on multicarrier systems. At first, alternative multicarrier kernels robust for high speed doubly-selective fading channel are sought. They include the comparisons of discrete Fourier transform (DFT), fractional Fourier transform (FrFT) and wavelet …
-
Capacity, coding and interference cancellation in multiuser multicarrier wireless communications systems
Multicarrier modulation and multiuser systems have generated a great deal of research during the last decade. Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation generated with the inverse Discrete Fourier Transform, which has been adopted for standards in wireless and …
-
Resource allocation for CDMA downlink to achieve maximum throughput
… by today's voice service. New generation systems will enable provision of a multitude of services each with different QoS and data rate requirements. To resolve problems lying in the integration of new generation systems with today's wireless voice services, several contributions are made …
-
Beamforming for MC-CDMA
… candidate for Fourth Generation (4G) wireless systems because it promises data rates up to 10Mbps. A variation of OFDM is Multi-Carrier CDMA (MC-CDMA) which is an OFDM technique where the individual data symbols are spread using a spreading code in the frequency domain. The spreading code …