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Cooperative diversity is the result of relaying among nodes to achieve space diversity in multipath environments that offer limited time and frequency diversity. Although there is now substantial literature covering specification and analysis of cooperative communication strategies based upon models of wireless environments, there is much less work(More)
—Spectrum sensing is a critical function for enabling dynamic spectrum access (DSA) in wireless networks that utilize cognitive radio. In DSA networks, unlicensed secondary users can gain access to a licensed spectrum band as long as they do not interfere with primary users. Spectrum sensing is subject to errors in the form of false alarms and missed(More)
Spectrum sensing is a critical function for enabling dynamic spectrum access (DSA) in wireless networks that utilize cognitive radio (CR). In DSA networks, unlicensed secondary users can gain access to a licensed spectrum band as long as they do not cause harmful interfere to primary users. Spectrum sensing is subject to errors in the form of false alarms(More)
Design and analysis of cooperative communication schemes based upon modeling and simulation exist in large quantities in the research literature. Despite this fact, there have been relatively few efforts directed toward implementing and experimentally evaluating such schemes. Cooperative protocols have many components that make them challenging to implement(More)
—The reduction in both user and control plane latency is a major goal for next generation (4G) cellular networks, specifically the Long Term Evolution-Advanced (LTE-A) standard. At the same time, relay stations, which introduce additional latency into transmissions, are seen as a potential means to improve cell spectral efficiency and coverage. This paper(More)
Block Markov superposition encoding has been used on a number of channels to enable transmitter cooperation, including the decode-and-forward (DF) relaying scheme on the full-duplex relay channel. We analyze the error performance of DF with regular encoding and sliding window decoding as the window size of the decoder is allowed to grow. Specifically, we(More)
by Glenn J. Bradford Increasing data rates in wireless devices is particularly challenging due to the presence of many impairments in the medium, including multipath fading. Diversity techniques are a means of increasing transmission reliability in multipath environments. This thesis focuses on cooperative diversity, a concept that obtains spatial diversity(More)
One key goal of software-defined radio (SDR) is to provide the possibility of operating in a wide range of frequency bands with a single device. At the same time, real-world communication systems require a high degree of amplification and filtering to achieve acceptable performance. Realizing these two goals creates an inherent challenge, as both high(More)
As Information and Communication Technologies (ICTs) become more diffuse, developers and designers need to consider a growing diversity of users including people with disabilities and aging populations. As a result, computing education needs to respond by providing students opportunities to learn about accessibility and designing for inclusion. This article(More)