The Pi Pico Rx is a minimal SDR receiver based on the Raspberry Pi Pico, featuring a “Tayloe” Quadrature Sampling Detector (QSD). This design utilizes an inexpensive analog switch, allowing for a high-quality mixer. The RP2040’s PIO feature generates a quadrature oscillator, eliminating the need for an external programmable oscillator. With a range up to 30MHz, the Pi Pico Rx covers the LW, MW, and SW bands. The built-in ADC samples the IQ channels, while the dual-core ARM Cortex M0 processor handles the demodulation of various signals. By using the Pi Pico, an analog switch, and an op-amp, users can construct a powerful SDR receiver.
| Signal | Change | 10y horizon | Driving force |
|---|---|---|---|
| Pi Pico Rx - Crystal radio for digital age | Technological advancement | Miniature SDR receivers with improved performance | Desire for portable and affordable SDR receivers |
| Implementation of Quadrature Sampling Detector (QSD) | Improve functionality and performance | Higher quality mixer and more accurate demodulation | Advancements in digital signal processing algorithms and hardware |
| PIO feature on RP2040 eliminates need for external oscillator | Streamlining hardware design | Easier and more cost-effective implementation of quadrature oscillator | Desire for simplicity and cost reduction in hardware design |
| DSP algorithms for demodulating AM, FM, SSB, and CW | Enhanced audio processing | Improved audio quality and more accurate demodulation | Advancements in digital signal processing algorithms and increased computational power |
| PWM and low-pass filter for audio output | Improved audio output | Higher fidelity audio output without the need for external audio amplifier | Desire for simpler and more compact audio output solutions |
| Capability to receive signals from halfway around the globe | Expanded reception range | Ability to receive and process signals from distant locations | Increased accessibility and global connectivity through advancements in radio technology |
| Updateable firmware for improved functionality | Flexibility and adaptability | Ability to enhance and customize the receiver’s features and performance | Desire for continuous improvement and user-driven customization of electronic devices |
| Menu navigation algorithm and inscription size adjustments | User interface customization | Enhanced user experience and personalized settings | Desire for customizable and user-friendly interfaces in electronic devices |
| Miniature Tayloe-based SDR receiver | Size reduction and portability | Smaller and more compact SDR receivers with improved performance | Desire for portable and convenient SDR receivers without sacrificing functionality and performance |