---
name: "polar_channel_construction"
section: "1"
platform: "linux"
package: "gnuradio"
version: "3.10.12.0-18"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/polar_channel_construction"
---

# polar\_channel\_construction(1)

Gnu Radio Polar Configurator

## NAME

polar\_channel\_construction - Gnu Radio Polar Configurator

## DESCRIPTION

POLAR code channel construction.

## Channel Construction

**polar\_channel\_construction** exposes functionality to calculate polar channels for different sizes. It may be used to calculate Bhattacharyya parameters once and store them in a file in '~/.gnuradio/polar'. Frozen bit positions are recalculated on every run.

**polar\_channel\_construction** provides a command-line interface for all the channel construction code. These features are also accessible via the Polar Configurator block in GRC.

## BEC

BEC channel construction can be calculated explicitly because the BEC represents a special case which simplifies the task. All functionality regarding this channel is located in 'channel\_construction\_bec'.

## AWGN

In general channel construction for polar codes is a very time consuming task. Tal and Vardy proposed a quantization algorithm for channel construction which makes it feasible. The corresponding implementation is located in 'channel\_construction\_awgn'. It should be noted that this more of a baseline implementation which lacks all the advanced features the original implementation provides. However, simulations show that BEC channel construction with a design-SNR of 0.0dB yields similar performance and should be preferred here.

## SEE ALSO

[gnuradio-companion(1)](/gnuradio-companion/1.md)