Channel Estimation And Multiuser Detection In Asynchronous Satellite Communications

TL;DR

This paper introduces a novel joint channel estimation and multiuser detection method for asynchronous satellite communications using DS-CDMA, enhancing data accuracy by jointly estimating delays and amplitudes with successive interference cancellation.

Contribution

It presents a new joint channel estimation technique combined with SIC-based multiuser detection tailored for asynchronous satellite DS-CDMA systems.

Findings

Effective joint estimation of delays and amplitudes achieved.

Integrated SIC architecture improves multiuser detection performance.

System evaluated through satellite uplink simulations with asynchronous access.

Abstract

In this paper, we propose a new method of channel estimation for asynchronous additive white Gaussian noise channels in satellite communications. This method is based on signals correlation and multiuser interference cancellation which adopts a successive structure. Propagation delays and signals amplitudes are jointly estimated in order to be used for data detection at the receiver. As, a multiuser detector, a single stage successive interference cancellation (SIC) architecture is analyzed and integrated to the channel estimation technique and the whole system is evaluated. The satellite access method adopted is the direct sequence code division multiple access (DS CDMA) one. To evaluate the channel estimation and the detection technique, we have simulated a satellite uplink with an asynchronous multiuser access.