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 406 for “"wireless communications"”.
-
Optical wireless communications
The phenomenal global demand for wireless communication links with greater bandwidths is motivating engineers world over to come up with alternatives communication links. One of such system that has received a great deal of attention and has shown evidence of a promising future is infrared optical …
-
Security issues in wireless communications
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
-
Miniaturised bandpass filters for wireless communications
The wireless industry has seen exceptional development over the past few decades due to years of sustained military and commercial enterprise. While the electromagnetic spectrum is becoming increasingly congested, there is a growing tendency to strive for higher bandwidths, faster throughputs, …
-
Studies in Multiple-Antenna Wireless Communications
<p>Wireless communications systems are used today in a variety of milieux, with a recurring theme: users and applications regularly require higher throughput. Multiple antennas enable higher throughput and/or more robust performance than single-antenna communications, with no increase in power or …
-
Energy and Spectral Efficient Wireless Communications
… and spectrum are two precious commodities for wireless communications. How to improve the energy and spectrum efficiency has become two critical issues for the designs of wireless communication systems. This dissertation is devoted to the development of energy and spectral efficient wireless …
-
Secure OFDM System Design for Wireless Communications
Wireless communications is widely employed in modern society and plays an increasingly important role in people's daily life. The broadcast nature of radio propagation, however, causes wireless communications particularly vulnerable to malicious attacks, and leads to critical challenges in securing …
-
Learning-based Decision Making in Wireless Communications
… and exponential increase in data traffic, wireless networks have recently grown significantly and become more complex. In such large-scale complex wireless networks, it is challenging and, oftentimes, infeasible for conventional optimization methods to quickly solve critical decision-making …
-
Wireless Communications in the Energy -Limited Regime
In the other case when B is large, it is not reasonable to assume any form of CSI. Thus, we consider noncoherent fading channels and characterize the reliability function in the low-SNR regime. Further, by allowing multiple transmit and receive antennas, we study the impact of multiple antennas on …
-
Flexible signal processing algorithms for wireless communications
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
-
Laboratory experiments for a wireless communications course
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
-
Application of Artificial Intelligence to Wireless Communications
… of cognitive radio. A cognitive radio is a wireless communications device capable of sensing the environment and making decisions on how to use the available radio resources to enable communications with a certain quality of service. The cognitive engine, the intelligent system behind the …
-
Iterative Detection and Decoding for Wireless Communications
Turbo codes are a class of forward error correction (FEC) codes that offer energy efficiencies close to the limits predicted by information theory. The features of turbo codes include parallel code concatenation, recursive convolutional encoding, nonuniform interleaving, and an associated iterative …
-
Analysis of antenna beamforming architectures for wireless communications
This Master’s Thesis presents a comparative analysis of analog, digital and hybrid beamforming architectures for Multiple-Input Multiple-Output (MIMO) systems in Fifth-generation (5G) and future Sixth-generation (6G) networks. The demand for high data rates and massive connectivity, positions …
-
UAV-Enabled Wireless Communications: Deployment, Optimization, and Analysis
… as aerial base stations (BSs) or relays, in wireless communications systems. Due to their high likelihood of line-of-sight (LoS) links and ease of deployment, they play a crucial role in providing faster and better wireless network access and service where extra network resources are needed …
-
Performance of multi-user codes in wireless communications
… station to mobile station and vice versa. In wireless communications a signal received by a mobile station goes through different fading channels resulting. These multi-paths add constructively and destructively with different delays and attenuation at the mobile station. The autocorrelation …
-
Novel narrowband microstrip filters for wireless communications systems
… for filter applications in next generation wireless communication systems. Several novel microstrip bandpass filter structures have been introduced that meet the stringent requirements for high-performance (shaip-cutoff frequency response, low insertion-loss, high return-loss, and high …
-
Channel Probing for an Indoor Wireless Communications Channel
The statistics of the amplitude, time and angle of arrival of multipaths in an indoor environment are all necessary components of multipath models used to simulate the performance of spatial diversity in receive antenna configurations. The model presented by Saleh and Valenzuela, was added to by …
-
Optimum Design of Spectral Efficient Green Wireless Communications
… the optimum design of spectral efficient green wireless communications. Energy efficiency (EE), which is defined as the inverse of average energy required to successfully deliver one information bit from a source to its destination, and spectral efficiency (SE), which is defined as the average …
-
Channel Prediction for Adaptive Modulation in Wireless Communications
This thesis examines the benefits of using adaptive modulation and coding in terms of spectral efficiency and probability of bit error. Specifically, we examine the performance enhancement made possible by using linear prediction along with channel estimation in conjunction with adaptive …
-
High efficiency switching CMOS power amplifiers for wireless communications
… requirements of power amplifiers (PAs) for wireless applications. However, the design of highly efficient CMOS PAs for watt-level applications is a challenging task. This dissertation focuses on the development of the design method for highly efficient CMOS PAs to overcome the fundamental …
Page 1 of 21