Software Defined Radio Performance Trades & Tweaks: Maximizing RX/TX Quality
Michael Calabro delivers an engineering deep dive into software defined radio performance, optimizing gain staging, antenna impedance matching, and dynamic range.
Summary
Understanding SDR Hardware Architecture and Bottlenecks
Software-defined radios require careful balancing of analog front-end RF components, low-noise amplifiers (LNAs), mixers, and Analog-to-Digital Converters (ADCs).
Optimizing Gain Staging and Minimizing Distortion
Michael Calabro explains how improper gain settings cause ADC clipping, intermodulation distortion, and noise floor elevation, degrading weak signal reception.
Antenna Selection and Impedance Matching
Calabro details matching antenna resonant frequencies (VSWR), utilizing bandpass filters, and deploying low-loss coaxial cabling to maximize signal-to-noise ratio (SNR).
Practical Troubleshooting and Benchtop Calibration
The author provides practical guidelines for measuring noise figures, calibrating local oscillator drift (PPM), and selecting SDR hardware for specific applications.
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