# Low-PAPR Multi-channel OOK Waveform for IEEE 802.11ba Wake-up Radio

## TL;DR

This paper introduces a complementary sequence-based transmission scheme for IEEE 802.11ba wake-up radio signals, significantly reducing PAPR and improving error rate performance under power amplifier distortion.

## Contribution

It proposes a novel PAPR reduction method using Golay complementary pairs for multi-channel wake-up signals in IEEE 802.11ba.

## Key findings

- PAPR reduced by more than 3 dB in FDMA scenarios
- Superior error rate performance under severe PA distortion
- Compatible with IEEE 802.11ba framework

## Abstract

The peak-to-average-power ratio (PAPR) of the frequency domain multiplexed wake-up signals (WUSs) specified in IEEE P802.11ba can be very large and difficult to manage since it depends on the number and allocation of the active channels, and the data rate on each channel. To address this issue, we propose a transmission scheme based on complementary sequences (CSs) for multiple WUSs multiplexed in the frequency domain. We discuss how to construct CSs compatible with the framework of IEEE P802.11ba by exploiting a recursive Golay complementary pair (GCP) construction to reduce the instantaneous power fluctuations in time. We compare the proposed scheme with the other options under a non-linear power amplifier (PA) distortion. Numerical results show that the proposed scheme can lower the PAPR of the transmitted signal in frequency division multiple access (FDMA) scenarios more than 3 dB and yields a superior error rate performance under severe PA distortion.