Title:
|
Hybrid analog-digital transmit beamforming for spectrum sharing satellite-terrestrial systems
|
Author:
|
Vazquez, Miguel Angel; Blanco, Luis; Artiga Campos, Xavier; Pérez Neira, Ana Isabel
|
Other authors:
|
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions |
Abstract:
|
This paper deals with the problem of hybrid analog-digital transmit beamforming under spectrum sharing constraints. Hybrid multiantenna architectures are ideal for high throughput wireless links, where full-digital solutions are extremely expensive due to their the high number of radiofrequency chains and full-analog architectures require
complex and lossy beamforming networks. In contrast to the recent works regarding mm-wave precoding, we consider the case where the transmitter is required to limit its array gain to certain angles-of-departure where non-intended receivers are located. This is of great importance in the 18 GHz band where wireless backhaul systems can eventually share the spectrum with satellite systems, leading to a substantial reduction of the spectrum license cost. We propose a general optimization framework based on an alternate analog-digital optimization that can consider any arbitrary sub-array scheme (i.e. interleaved, localized, etc.). At each stage of the analog-digital optimization a quadraticallyconstraint-quadratic-program needs to be solved and it requires the use of novel non-smooth methods. Numerical results show the performance of our method for different scenarios and sub-array schemes. |
Abstract:
|
Peer Reviewed |
Subject(s):
|
-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal -Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telemàtica i xarxes d'ordinadors -Signal processing -Wireless LANs -Beamforming -Complex networks -Millimeter waves -Network architecture -Numerical methods -Quadratic programming -Wireless telecommunication Systems -Analog architectures -Digital optimization -General optimizations -Quadratic programs -Substantial reduction -Terrestrial systems -Transmit beamforming -Wireless backhaul -Tractament del senyal -Xarxes locals sense fil Wi-Fi |
Rights:
|
|
Document type:
|
Article - Published version Conference Object |
Published by:
|
Institute of Electrical and Electronics Engineers (IEEE)
|
Share:
|
|