# Clipping Noise Compensation for Overlapped Time Domain Multiplexing toward Low Peak-to-Average Power Ratio

## TL;DR

This paper introduces a method to reduce signal distortion in a high-rate communication system, improving performance when signals are clipped.

## Contribution

An iterative clipping noise compensation scheme is proposed to enhance OvTDM transmission performance under amplitude clipping.

## Key findings

- An iterative scheme effectively estimates and cancels clipping distortion in OvTDM systems.
- The proposed method minimizes PAPR optimization costs while improving transmission performance.
- Clipping noise mitigation is achieved without significant computational overhead.

## Abstract

Overlapped Time Domain Multiplexing (OvTDM) is a high-rate transmission technology that employs the idea of superposition coded modulation (SCM) scheme for signal generation, aiming to achieve maximum channel capacity sharing. Meanwhile, it is also widely considered as a promising technique toward physical layer security. As a main drawback of such system, a high peak-to-average power ratio (PAPR) issue in this system, arising from multi-layer superposition, can be addressed through intentional clipping. However, the detection at the receiver side is vulnerable to nonlinear distortion caused by clipping, which can degrade the performance. To mitigate this distortion, this paper proposed an iterative scheme for estimating and partially canceling clipping distortion at the receiver. We managed to mitigate the impact of clipping noise as much as possible and minimize the cost of optimizing PAPR, thereby improving the transmission performance of OvTDM in the context of amplitude clipping.