2 research outputs found
Analysis of Energy Detector in Cooperative Relay Networks for Cognitive Radios
In this paper, performance of the energy detector
is analyzed in blind cooperative relay networks operating
over independent and identically distributed (IID) Rayleigh
fading channels. First, utilizing the closed-form expression of
the probability density function (PDF) of the dual-hop relay
link along with an alternative series form representation of
the generalized marcum-Q function, exact average detection
probability expression is obtained for the dual-hop blind relay
link. After that, a closed-form PDF expression is derived for
the total received signal-to-noise ratio (SNR) of the combined
received signal, received via the relay path and direct path, at
the destination, which is assumed to be equipped with selection
combiner (SC) and energy detector. Finally, within the same
analytical framework, as established for the analysis of the
relay link, an exact average detection probability expression
for the cooperative system is derived. Since the obtained
expressions are in the form of infinite summation series,
therefore, respective series truncation error bounds are also
calculated, which can be used to compute the number of terms
required to achieve a given figure of accuracy. In the end,
analytical expressions are validated with the help of computer
simulations. It is expected that these analysis will be helpful
in quantifying the futur