Year: 2024
Type: conference-paper
Abstract: In this work, we consider a cell-free massive multiple-input multiple-output (CFmMIMO) integrated sensing and communications (ISAC) system with maximum-ratio transmission schemes combined with multistatic radar-type sensing. Our focus lies on deriving closed-form expressions for the achievable communications rate and the Cramér-Rae lower bound (CRLB), which serve as performance metrics for communications and sensing operations, respectively. The expressions enable us to investigate important operational characteristics of multistatic CFmMIMO-ISAC, including the mutual effects of communications and sensing as well as the advantages stemming from using numerous distributed antenna arrays for each functionality. Furthermore, we optimize the power allocation among the access points to maximize the communications rate while guaranteeing the CRLB constraints and total transmit power budget. Extensive numerical results are presented to validate our theoretical findings and demonstrate the efficiency of the proposed power allocation approach.
Authors: Nhan Thanh Nguyen, Tianyu Fang, Hien Quoc Ngo, Markku Juntti
Institutions: University of Oulu, Queen's University Belfast
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funder: Business Finland
OpenAlex ID: W4409156743