期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2013
卷号：2013
DOI：10.1155/2013/141480
出版社：Hindawi Publishing Corporation
摘要：This paper proposes a noncoherent spectrum
sensing scheme for the cognitive coexistent heterogeneous
networks with the assistance of geolocation information
of primary and secondary nodes. Different from the
conventional networks with single secondary network, the
spectrum sensing scheme in the coexistence scenario should
not only detect the primary signal but also detect the
secondary signals to avoid the interference with both the
primary network and the operating coexistent secondary
networks. Therefore, the sensing scheme in this case should
be able to differentiate the primary signal from each
kind of the secondary signals. However, in the coexistent
heterogeneous scenarios, the secondary signals may exploit
different PHY modes (some of them may be the same as
the primary PHY mode), which imposes difficulties in the
coherent signal detection schemes. Aiming to tackle this
problem, the parallel detection of both primary signal and
each kind of secondary signals is implemented through a
proposed noncoherent power decomposition scheme. In
this scheme, the power decomposition is formulated into
a problem of solving a nonhomogeneous linear equation
matrix. During the signal detection, the characteristics of
both primary and secondary signals are not required. Both
the analysis and the simulation results show the feasibility
and efficiency of the proposed scheme.
