Cognitive pilot channel: Enabler for radio systems coexistence

Abstract

With an increasing number of collocated personal, local and cellular wireless communication systems, the question of optimum coexistence and internetworking are raised. Although some mitigation techniques, like DAA, LDC, Frequency band notching etc. are being widely studied by industries, regulation bodies and standardization authorities, none of them show good performance in terms of detection and energy consumption without having a priori knowledge about the primary system which is not usually available. Cognitive radios and networks with cognitive signaling and dataaided mitigation techniques can become then key enablers for true heterogeneous communication environment with optimal sharing of the spectrum and coexistence. Cognitive pilot channel (CPC) is a novel, recently proposed approach which could guarantee a conflict-free coexistence. In this paper we show a generic scheme to achieve better coexistence between UWB and WIMAX through enhancing existing mitigation techniques.

Cognitive Radio Techniques Under Practical Imperfections: A Survey

“…The above interaction may require additional modifications in the primary legacy radio systems, which might be difficult to implement in practice. In this context, Cognitive Pilot Channel (CPC) has received important attention as a signalling channel in the scenarios of primary-secondary coexistence [49], [50].…”

Collaborative Spectrum Sensing for Cognitive Radio Networks

“…• directly via control channel such as Cognitive Pilot Channel (CPC) (Filo et al, 2009;Sallent et al, 2009); • estimated via signal processing techniques (Cardoso et al, 2008;Damljanovic, 2008;Hossain et al, 2009); • estimated via ad-hoc routing neighborhood discovery (Arachchige et al, 2008;Damljanovic, 2008;Krishnamurthy et al, 2009); • estimated via geo-location techniques (Shellhammer et al, 2009). …”

Control Plane for Spectrum Access and Mobility in Cognitive Radio Networks with Heterogeneous Frequency Devices

“…information transmitted in different channels of the data transmission (Sallent et al, 2009). Studies have been conducted to define the quantity of information that should be transmitted in the CPC, the bandwidth for each CPC, and the "out-band" and the "in-band" transmission or other solutions with a combination of both (Filo et al, 2009;Pérez-Romero et al, 2007;Sallent et al, 2009). In Fig.…”