ece4305_L03

ece4305_L03 - Practical Radio System Considerations...

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Unformatted text preview: Practical Radio System Considerations ECE4305: Software-Defined Radio Systems and Analysis Professor Alexander M. Wyglinski Department of Electrical and Computer Engineering Worcester Polytechnic Institute Lecture 3 Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Practical Radio System Considerations Implementation Issues Spectral Regulatory Constraints Engineering Trade-offs I When designing wireless communication systems, decisions are required that adequately balance various system requirements I Transmit power, i.e., communication range, battery life I Data rate, i.e., bandwidth, throughput I Probability of bit error, i.e., error robustness I Interference I Cost I Form factor I Some of these requirements can be conflicting I Transmit power versus probability of bit error I Interference versus data rate I Cost versus form factor I Design decisions dependent on target wireless application Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Practical Radio System Considerations Implementation Issues Spectral Regulatory Constraints Faster Than Real-time Concept I Rate at which discrete information is mapped to and from the analog domain dictated by sampling rate I Defined by the analog-to-digital converter (ADC) and digital-to-analog converter (DAC) I Bottleneck of any digital communication system I Digital processing rate could be orders of magnitude higher than ADC/DAC I Within intra-sample time instants, numerous digital processing cycles can occur I Commit numerous digital processing cycles for each sample I Human operator unaware of any delay in transmitting/receiving samples I If sampling rate is in real-time, then the digital processing between samples is faster than real-time I Faster than real-time concept important since advanced processes and algorithms can be employed I Equalization and signal distortion compensation Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Practical Radio System Considerations...
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This note was uploaded on 01/13/2011 for the course ECE 4305 taught by Professor Wy during the Spring '10 term at WPI.

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ece4305_L03 - Practical Radio System Considerations...

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