# An efficient coding algorithm for general Framed Pulse Width Modulations

## TL;DR

This paper presents a new coding algorithm for Framed Pulse Width Modulation that significantly reduces LUT requirements, increases bitrate, and is compatible with various FPWM configurations, validated through MATLAB simulations.

## Contribution

The paper introduces a novel FPWM coding algorithm that reduces LUT size by 93%, increases bitrate by 25%, and supports general FPWM frame lengths and resolutions.

## Key findings

- 93% reduction in LUTs required
- 25% increase in bitrate
- No bit errors in decoding

## Abstract

This paper introduces a new coding algorithm for Framed Pulse Width Modulation (FPWM). The proposed algorithm requires 93% fewer look-up tables (LUTs) than the previous FPWM coding algorithm and increases a bitrate by 25%. The proposed algorithm is compatible with general FPWM with various frame lengths and pulse width resolutions. Theoretical bitrates and the sizes of LUT required for coding various FPWMs are also provided. The MATLAB simulation demonstrates the proposed FPWM signal which contains 14-bit information in 8 UI frame length, showing 75% higher bitrate than the NRZ signal with the same baud rate. The decoding algorithm restores the original bit without any bit error and validates the proposed FPWM and its coding scheme.

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Source: https://tomesphere.com/paper/1905.00274