Global ETD Search
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Showing 1 to 4 of 4 for “"Wireless/Digital Communications"”.
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A Low-Power, Variable-Resolution Analog-to-Digital Converter
Analog-to-digital converters (ADCs) are used to convert analog signals to the digital domain in digital communications systems. An ADC used in wireless communications should meet the necessary requirements for the worst-case channel condition. However, the worst-case scenario rarely occurs. As a …
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Exploiting Cyclostationarity for Radio Environmental Awareness in Cognitive Radios
The tremendous ongoing growth of wireless digital communications has raised spectrum shortage and security issues. In particular, the need for new spectrum is the main obstacle in continuing this growth. Recent studies on radio spectrum usage have shown that pre-allocation of spectrum bands to …
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Secure Machine Learning Based RF Signal Classification for Wireless Systems
… and coordinate its access among heterogeneous wireless systems, network administrators and/or users must be able to identify observed transmissions rapidly and accurately. Recent research shows that deep neural networks (DNNs) can identify the underlying waveform of an RF signal based on the …
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Reducing Multiple Access Interference in Broadband Multi-User Wireless Networks
… techniques for multi-carrier multi-user wireless communication networks.</p> <p>In multi-carrier code division multiple access (MC-CDMA) systems, a full multipath diversity can be achieved by transmitting one symbol over multiple orthogonal subcarriers by means of spreading codes. …