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 20 of 32 for “"bandwidth efficiency"”.
-
Rate-Adaptive Runlength Limited Encoding for High-Speed Infrared Communication
… to other infrared modulation schemes in terms of bandwidth efficiency, duty cycle control, and synchronization frequency. Rate adaptive techniques allow for quick convergence of RA-RLL parameters to acceptable values. RA-RLL may be feasibly implemented on systems with non-ideal timing and digital …
-
Impact of Time Synchronization on Time Aware Shaper Scheduling in Time Sensitive Networks
… may fail in real networks or lead to inefficient bandwidth usage. This thesis shows that incorporating realistic time synchronization parameters into TAS scheduling significantly improves bandwidth efficiency. Compared to conventional worst-case approaches, using network-obtained synchronization …
-
An investigation into the performance capabilities of multi-h CPFSK digital modulation
… is a coded modulation scheme. It exhibits high bandwidth efficiency and good envelope properties and is therefore well suited to use in satellite communications channels. However, the power efficiency of multi-h CPFSK signals is largely dependent on the particular multi-h code used, as well as …
-
Deep Joint Denoising and Compression for Satellite Images
… and hardware complexity but also improves bandwidth efficiency, offering a compelling alternative to traditional two-step pipelines.
-
Investigation into variable shift keying using direct sequence spread spectrum techniques
… Suppressed Carrier) modulation scheme with good bandwidth efficiency. Data is coherently demodulated in the receiver. In existing VPSK systems, the locally generated carrier in the receiver is synchronized to an integer multiple of the symbol clock frequency to allow coherent demodulation. This …
-
Performance of orthogonal frequency division multiplexing in a high noise, low signal-to-noise ratio environment with co-channel interference
… Its resilience to cochannel interference and bandwidth efficiency make it ideal for many different applications. With its increasing popularity among disparate facets of society, it becomes likelier that enemy militaries and/or nonmilitary combatants will utilize the technique or a system that …
-
On the performance and capacity of space-time block coded multicarrier CDMA communication systems
… the bit error ratio (BER) performance and bandwidth efficiency of STBC MC-CDMA systems in the presence of carrier frequency offset (CFO). Then various multirate access schemes, multicode, variable spreading gain (VSG) and multiple symbol rate (MSR), are investigated. Next, the thesis looks …
-
Digital pulse interval modulation for indoor optical wireless communication systems
… frequency counterpart, such as the abundance of bandwidth that is currently unregulated worldwide, the availability of low cost emitters and detectors, inherent security and resistance to multi path fading. The work presented in this thesis focuses on modulation techniques, the fundamental aim …
-
Coexistence of Wireless Systems for Spectrum Sharing
… contribute to achieve appreciable increase of bandwidth efficiency. The proposed techniques can contribute to making spectrum sharing a viable solution for the ever evolving capacity demands in the wireless communications landscape.
-
Factor graphs and MCMC approaches to iterative equalization of nonlinear dispersive channels
… schemes to achieve high data-rates and the bandwidth efficiency. Satellite channel is a typical case of nonlinear channel that needs to be used efficiently. We develop two novel equalization strategies for a general class of nonlinear channels. Both strategies are based on iterating between …
-
Novel DWT-DAPSK based transceivers for DVB-T transmission and next generation mobile networks
… communication services with very high spectral efficiency and significantly improved performance. Orthogonal Frequency Division Multiplexing (OFDM) systems have been increasingly deployed in mobile networks for their spectral efficiency and optimum bit error rate. An OFDM system is a …
-
Efficient orchestration of data centers via comprehensive and application-aware trade-off exploration
… attempting to optimize network survivability, bandwidth efficiency, power conservation, and computational contention, we demonstrate that our approach enumerates a wider range of, and potentially better, solutions than current orchestrators, for data centers with hundreds of switches, thousands …
-
Code-division multiplexing
… format using cosine functions has higher bandwidth efficiency than the single-carrier format, even in an ideal Gaussian channel model. Each pulse is shaped via a prototype baseband filter such that when the demodulated signal is detected through a baseband matched filter, the resulting …
-
Digital Transmission by Hermite N-Dimensional Antipodal Scheme
… digital modulation technique is proposed as a bandwidth efficient method for the transmission of digital data. The technique uses an antipodal scheme in which parallel binary data signs baseband orthogonal waveforms derived from Hermite polynomials. Orthogonality guarantees recoverability of …
-
Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels
… reliable data transmission together with high bandwidth efficiency are important design aspects in a modern digital communication system. Many different approaches exist but in this thesis bandwidth efficiency is obtained by increasing the data transmission rate with the faster-than-Nyquist …
-
Design considerations for Ge-on-Si waveguide photodetector
… require that photodetector has a high 3 dB bandwidth. The ultimate limit for the response time for conventional photodetectors (like vertically illuminated photodiode, Schotky photodiode, MSM photodetector etc.) is given by the transit time of the photogenerated electron-hole pairs, it can …
-
Robust Speech Filter And Voice Encoder Parameter Estimation using the Phase-Phase Correlator
… in terms of computing execution time and channel bandwidth usage while providing, in the absence of im- pulsive noise, natural sounding synthetic speech signals. This good performance has been achieved via the use of a maximum likelihood parameter estimation of an auto-regressive model of order …
-
Optimizing Placement and Delivery for Coded Caching
… channel coding techniques offer chances to boost bandwidth efficiency, a widely adopted and highly effective approach to optimize traffic flows is from the edge device's perspective. By caching popular content at the network edge (such as base stations, routers, or end devices), frequently …
-
A new sufficient-order blind equalization scheme
The data throughput or bandwidth efficiency of high-speed digital transmission over band-limited channels can be increased by employing a blind equalizer. The traditional blind equalization schemes, employing only adaptive finite impulse response (FIR) filter-based structures, perform poorly for …
-
Energy-Efficient Self-Organization Protocols for Sensor Networks
… impact on a wide array of applications on the efficiency of many civilian and military applications including combat field surveillance, intrusion detection, disaster management among many others. The basic management problem in the WSN is to balance the utility of the activity in the network …
Page 1 of 2