POLAR_CHANNEL_CONSTRUCTION(1)

✨ NAME ✨

polar_channel_construction — the Gnu Radio Polar Configurator, bestie 💖

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🎀 DESCRIPTION 🎀

Okay so real talk: this is all about POLAR code channel construction. That's the whole vibe. That's the assignment. 👑

🧵 Channel Construction

polar_channel_construction exposes functionality to calculate polar channels for different sizes. Yes, different sizes, she contains multitudes.

It may be used to calculate Bhattacharyya parameters once and store them in a file in ~/.gnuradio/polar — so like, do the math one time, save it, never think about it again, iconic behavior honestly. 🫶

Heads up bestie: frozen bit positions are recalculated on every run. Every. Single. Run. No caching those, they're living in the moment.

polar_channel_construction provides a command-line interface for all the channel construction code. And if CLI isn't your era? These features are also accessible via the Polar Configurator block in GRC. Options, we love to see it. ✨

🦋 BEC

BEC channel construction can be calculated explicitly, because the BEC represents a special case which simplifies the task. It's giving shortcut but make it legitimate. 💅

All functionality regarding this channel is located in channel_construction_bec. That's where she lives, that's her house. 🏠

🌈 AWGN

Not gonna lie to you bestie: in general, channel construction for polar codes is a very time consuming task. 😭 Like, so much time. It's giving waiting-for-your-food-to-arrive energy.

Tal and Vardy proposed a quantization algorithm for channel construction which makes it feasible. Slay, thank you Tal and Vardy, we owe you everything. 🙏

The corresponding implementation is located in channel_construction_awgn.

Lowkey important note: this is more of a baseline implementation which lacks all the advanced features the original implementation provides. So like, she's doing her best, but she is not the final form. 💀

However — and this is the plot twist — simulations show that BEC channel construction with a design-SNR of 0.0dB yields similar performance and should be preferred here. So use that one. That's the move. Periodt. 💖

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🌟 SEE ALSO 🌟

• gnuradio-companion(1) — go say hi to her too 🫶

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Okay that's the whole page, bestie, you ate that. This was polar_channel_construction, version 3.10..., dated 2026-01-03, from your User Commands era. Go construct some channels, you absolute main character. 👑💅✨