Cognitive MIMO radio: an emerging paradigm for enhancing wireless access capability
by Enzo Baccarelli, Mauro Biagi, Cristian Pelizzoni, Nicola Cordeschi
International Journal of Communication Networks and Distributed Systems (IJCNDS), Vol. 2, No. 2/3, 2009

Abstract: In this contribution, we explore the access performance of cognitive multiple-input multiple-output (MIMO) radio, a novel paradigm that should combine the flexibility features of cognitive radio with the multiplexing capabilities of the multi-antenna one. As application scenario, we consider the (Rayleigh flat-faded) uplink of a WLAN working in infrastructure-mode, where non-cooperative multi-antenna cognitive radios attempt to join to a (possibly multi-antenna) access point (AP). The target of each radio is the competitive maximisation of own access throughput in the presence of (spatially-colored) multiple-access interference (MAI). Being the radios cognitive, they are capable to 'sense' the ambient-context and 'self-reconfigure' their access strategy via suitable power-allocation and spatial signal-shaping. Hence, by exploiting these cognitive capabilities, the access to the MIMO uplink is modelled as a non-cooperative strategic game. An iterative and scalable algorithm is developed that allows to play the resulting access game in a distributed and asynchronous way (under both best-effort and 'contracted-QoS' access policies) by resorting on the implementation of MAI-mitigation strategies.

Online publication date: Thu, 01-Jan-2009

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Communication Networks and Distributed Systems (IJCNDS):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com