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Performance Analysis of Underlay Cognitive Radio Systems: Estimation-Throughput Tradeoff | | Ankit Kaushik
; Shree Krishna Sharma
; Symeon Chatzinotas
; Björn Ottersten
; Friedrich K. Jondral
; | | Date: |
12 Oct 2015 | | Abstract: | In this letter, we study the performance of cognitive Underlay Systems (USs)
that employ power control mechanism at the Secondary Transmitter (ST). Existing
baseline models considered for the performance analysis either assume the
knowledge of involved channels at the ST or retrieve this information by means
of a feedback channel, however, such situations hardly exist in practice.
Motivated by this fact, we propose a novel approach that incorporates the
estimation of the involved channels at the ST, in order to characterize the
performance of USs under realistic scenarios. Moreover, we apply an outage
constraint that captures the impact of imperfect channel knowledge,
particularly on the interference power received at the primary receiver.
Besides this, we employ a transmit power constraint at the ST to determine an
operating regime for the US. Finally, we analyze an interesting tradeoff
between the estimation time and the secondary throughput allowing an optimized
performance of the US. | | Source: | arXiv, 1510.3353 | | Services: | Forum | Review | PDF | Favorites | |
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