CROWNCOM 2014, 9th International Conference on Cognitive Radio Oriented Wireless Networks, June 2-4, 2014, Oulu, Finland
In this paper, an analytical performance study is carried out for cognitive radio (CR) systems with the intent of comparing the two most popular CR designs, namely the interweaved and underlay setups. The comparison is carried out on an equal footing, by measuring the achievable ergodic capacity for secondary communication, under a common constraint on primary user's (PU) communication disturbance. Closed form expressions for the outage probability at the PU as well as expressions for the ergodic capacity of the secondary user (SU) are derived, as a function of key system parameters, under a rate-optimal sensing protocol for the interweaved scenario, and a standard power control policy for the underlay setting. The analysis reveals the regimes (in terms of primary activity, interference tolerance levels at the PU) where the interweaved design outperforms the underlay one and reciprocally.
Type:
Conférence
City:
Oulu
Date:
2014-06-02
Department:
Systèmes de Communication
Eurecom Ref:
4275
Copyright:
© 2014 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
See also:
