MIMO Radio-over-Copper (MIMO-RoC) is a transport system for indoor coverage that leverages the pre-existing building’s copper cabling infrastructure. In MIMO-RoC, the overall channel from the Base Band Units (BBU) to the end-user is the cascade of a MIMO-radio over a MIMO-cable channel and the analog fronthaul together with a wireless channel enables the transport to the mobile users. The entire system poses two main challenges: i) design low-complexity and flexible allocation strategies between wired and wireless resources; ii) design interference cancellation techniques tailored to the mutually coupled wired-wireless interference. While the former has been extensively investigated, the optimal design of precoding algorithms for the MIMO-RoC downlink is still an open issue and is covered here. In particular, in this work, the Linear Successive Allocation (LISA) algorithm has been revised and adapted to the MIMO amplify-and-forward (AF) structure of MIMO-RoC. Numerical results validate the proposed method considering a realistic radio environment with 100m copper cable remotization.
MIMO Radio-over-Copper (MIMO-RoC) è una soluzione per la copertura indoor che sfrutta l'infrastruttura di cavi in rame già presente negli edifici. In MIMO-RoC, il canale complessivo dalla Base Band Units (BBU) fino all' utente è la cascata di un canale MIMO-wired, seguito da un canale MIMO-wireless. L'intero sistema pone due sfide principali: i) design di strategie di allocazione flessibili e a bassa complessità ii)design di tecniche per la cancellazione dell'interferenza wired-wireless. Mentre la prima è stata già ampiamente investigata, il design di un algoritmo di precodifica per il MIMO-RoC downlink è lo scopo di questo lavoro. In particolare, l'algoritmo Linear Successive Allocation (LISA) è stato rivisitato e adattato alla struttura amplify-and-forward (AF) del MIMO-RoC. Il metodo qui proposto è validato da risultati numerici in uno scenario realistico con cavi in rame lunghi 100m.
Precoding design for the MIMO radio over copper downlink
RIZZELLO, VALENTINA
2018/2019
Abstract
MIMO Radio-over-Copper (MIMO-RoC) is a transport system for indoor coverage that leverages the pre-existing building’s copper cabling infrastructure. In MIMO-RoC, the overall channel from the Base Band Units (BBU) to the end-user is the cascade of a MIMO-radio over a MIMO-cable channel and the analog fronthaul together with a wireless channel enables the transport to the mobile users. The entire system poses two main challenges: i) design low-complexity and flexible allocation strategies between wired and wireless resources; ii) design interference cancellation techniques tailored to the mutually coupled wired-wireless interference. While the former has been extensively investigated, the optimal design of precoding algorithms for the MIMO-RoC downlink is still an open issue and is covered here. In particular, in this work, the Linear Successive Allocation (LISA) algorithm has been revised and adapted to the MIMO amplify-and-forward (AF) structure of MIMO-RoC. Numerical results validate the proposed method considering a realistic radio environment with 100m copper cable remotization.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/147350