ece4305_L02

ece4305_L02 - Introduction ECE4305: Software-Defined Radio...

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Unformatted text preview: Introduction ECE4305: Software-Defined Radio Systems and Analysis Professor Alexander M. Wyglinski Department of Electrical and Computer Engineering Worcester Polytechnic Institute Lecture 2 Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Introduction What is a Software-Defined Radio? Universal Software Radio Peripheral Microelectronics Evolution is Key! I Rapid evolution of microelectronics over the past several decades I Moores Law defines the long-term trend of the number of transistors accommodated on an integrated circuit I Doubling number of transistors per integrated circuit approximately every two years I Affects processing speed and memory I Microelectronics industry has significantly influenced digital communication systems sector I Digital communication transceivers are becoming more versatile , powerful , and portable I Microelectronics advancements have given rise to software-defined radio (SDR) technology I Baseband radio functions can be entirely implemented in digital logic and software Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Introduction What is a Software-Defined Radio? Universal Software Radio Peripheral Types of Microelectronics for SDR Implementation I General Purpose Microprocessor I Very flexible in terms of reconfigurability I Easy to implement new digital communication modules I Not specialized for mathematical computations I Potentially power inefficient I Digital Signal Processor (DSP) I Specialized for performing mathematical computations I Easy to implement new digital communication modules I Potentially slow for computationally expensive processes I Can be power efficient (e.g., used in cellular telephones) I Field Programmable Gate Array (FPGA) I Computationally powerful I Power inefficient I Not flexible nor easy to implement new modules I Graphics Processing Unit (GPU) I Extremely powerful computationally I Difficult to use and implement new modules Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Introduction What is a Software-Defined Radio? Universal Software Radio Peripheral SDR Definition I A class of reconfigurable/reprogrammable radios whose physical layer characteristics can be significantly modified via software changes I Capable of implementing different functions at different times on the same platform I Defines in software baseband radio features, e.g., modulation, error correction coding I Possesses some software control over RF front-end operations, e.g., transmission carrier frequency I Baseband radio functionality stored in memory I Different types of modulation, error correction coding, and other functional blocks are available to the SDR platform I Functional blocks can potentially be changed in real-time I Operating parameters of functional blocks can be adjusted either by human operator or automated process Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Introduction...
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ece4305_L02 - Introduction ECE4305: Software-Defined Radio...

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