By Maria-Gabriella Di Benedetto, Andrea F. Cattoni, Jocelyn Fiorina, Faouzi Bader, Luca De Nardis
This e-book, written by means of prime specialists from academia and undefined, deals a condensed review on scorching issues one of the Cognitive Radios and Networks medical and business groups (including these thought of in the framework of the eu fee motion IC0902) and offers interesting visions for the longer term. Examples of the topics thought of contain the layout of latest filter out bank-based air interfaces for spectrum sharing, medium entry keep an eye on layout protocols, the layout of cloud-based radio entry networks, an evolutionary imaginative and prescient for the advance and deployment of cognitive TCP/IP, and laws suitable to the improvement of a spectrum sharing marketplace. The concluding bankruptcy contains a pragmatic, hands-on instructional for these drawn to constructing their very own study attempt beds. via targeting the latest advances and destiny avenues, this e-book will support researchers in knowing the present matters and ideas in Cognitive Radios and Networks designs.
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Additional info for Cognitive Radio and Networking for Heterogeneous Wireless Networks: Recent Advances and Visions for the Future
Depending on the strength of the interference between wireless networks, different interference management approaches can be applied. If the interference is weaker than the noise floor, the interference signal can be treated as noise and the single user encoding/decoding mechanisms can be applied. Because of its simplicity and ease of implementation, this approach is widely used in practice, but does not achieve interference-free capacity even for the simple case of a Broadcast Channel (BC) .
3a). 25) 14 Y. Medjahdi et al. a b Fig. 26) 1 New Types of Air Interface Based on Filter Banks for Spectrum Sharing. . 27) Note that the signs C and correspond respectively to even and odd subchannels. Recently, Bellanger has proposed an alternative scheme for FBMC called frequency spreading filter bank multicarrier (FS-FBMC). g. H3 ; H2 ; H1 ; 1; H1 ; H2 ; H3 for PHYDYAS1 prototype filter with an overlapping factor K D 4), for each subcarrier . It is worth noticing that in this case, the prototype filter is designed based on the frequency sampling technique .
In this case, the utilization of FBMC systems becomes more advantageous and convenient due to their filtering properties . In other words, the good spectral localization of FBMC waveforms make them more suitable for cognitive radio networks physical layer allowing an efficient opportunistic spectrum access. Besides, a reduced implementation complexity can be achieved by relaxing all synchronization mechanisms between the primary and the secondary systems thanks to the robustness of FBMC waveforms to synchronization errors .
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