# Scalar Quantizer Design for Two-Way Channels

## TL;DR

This paper introduces a simple, low-delay scalar quantizer scheme for two-way channels that effectively mitigates interference, improving signal-to-distortion performance without error correction.

## Contribution

A novel full-duplex scalar quantization scheme optimized for two-way channels that implicitly reduces interference and enhances transmission quality.

## Key findings

- Full-duplex COSQ outperforms half-duplex in SNR-distortion metrics.
- The scheme is robust and low complexity, suitable for low-delay applications.
- Numerical results confirm improved performance over existing methods.

## Abstract

The problem of lossy transmission of correlated sources over memoryless two-way channels (TWCs) is considered. The objective is to develop a robust low delay and low complexity source-channel coding scheme without using error correction. A simple full-duplex channel optimized scalar quantization (COSQ) scheme that implicitly mitigates TWC interference is designed. Numerical results for sending Gaussian bivariate sources over binary additive-noise TWCs with either additive or multiplicative user interference show that, in terms of signal-to-distortion ratio performance, the proposed full-duplex COSQ scheme compares favourably with half-duplex COSQ.