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Packet Error Detection
Using a little air wobbler, we can transfer binary files, but with 487 bytes, perfect transmission is rare. Error checks like CRC help, but larger files mean more time wasted on retransmission. Splitting data into packets aids recovery, with CRC checks on each. Adding packet sequence headers further simplifies processing. Packets also support out-of-order transmission… Read More
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Multi-Packet Transmission
The day began with a library raffle win and delved into Huffman compression. Challenges arose with packet sizes and error correction, prompting adjustments for consistent lengths. Experimenting with multi-packet transmission, debugging, and UI refinements filled the day, despite technical hurdles and fatigue setting in by early morning. Read More
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Interleaving
The implementation of interleaving optimizes data transmission by rearranging bits to mitigate the impact of unstable frequencies, enhancing error correction. Despite initial high error rates, interleaving significantly reduces errors. Further considerations involve time-varying interleaving and channel exclusion. Evaluation of compression techniques like Huffman coding is also planned for improved efficiency. Read More
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Error Correction
The setup of Multi-Frequency Signaling in the app improved data-transfer speed, achieving 100 to 200 baud based on frequency spectrum, signal duration, and FFT size. Code configurations involved channel oscillators, bit transmission across channels, and error correction implementation. Challenges included signal stability and error rate optimization. Atari’s cassette drive provided insights into historical data-transfer methods. Read More