Buscar

Estamos realizando la búsqueda. Por favor, espere...

 Detalle_Publicacion

Experimental evaluation of interference alignment for broadband WLAN systems

Abstract: In this paper, we present an experimental study on the performance of spatial interference alignment (IA) in indoor wireless local area network scenarios that use orthogonal frequency division multiplexing (OFDM) according to the physical-layer specifications of the IEEE 802.11a standard. Experiments have been carried out using a wireless network testbed capable of implementing a 3-user MIMO interference channel. We have implemented IA decoding schemes that can be designed according to distinct criteria (e.g., zero-forcing or MaxSINR). The measurement methodology has been validated considering practical issues like the number of OFDM training symbols used for channel estimation or feedback time. In case of asynchronous users, a time-domain IA decoding filter is also compared to its frequency domain counterpart. We also evaluated the performance of IA from bit error ratio measurement-based results in comparison to different time-division multiple access transmission schemes. The comparison includes single- and multiple-antenna systems transmitting over the dominant mode of the MIMO channel. Our results indicate that spatial IA is suitable for practical indoor scenarios in which wireless channels often exhibit relatively large coherence times.

 Autoría: Lameiro C., González Ó., García-Naya J., Santamaría I., Castedo L.,

 Fuente: EURASIP Journal on Wireless Communications and Networking, 2015, 180

Editorial: Springeropen /Hindawi

 Fecha de publicación: 01/06/2015

Nº de páginas: 21

Tipo de publicación: Artículo de Revista

 DOI: 10.1186/s13638-015-0409-z

ISSN: 1687-1472,1687-1499

Proyecto español: TEC2013-47141-C4-R ; CSD2008-00010

Autores/as

CRISTIAN LAMEIRO GUTIERREZ

OSCAR GONZALEZ FERNANDEZ

JOSE ANTONIO GARCIA NAYA

LUIS CASTEDO RIBAS