English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We employ Permutation Trellis Code (PTC) based multi-level Frequency ShiftKeying signaling to mitigate the impact of Primary Users (PUs) on theperformance of Secondary Users (SUs) in Cognitive Radio Networks (CRNs). ThePUs are assumed to be dynamic in that they appear intermittently and stayactive for an unknown duration. Our approach is based on the use of PTCcombined with multi-level FSK modulation so that an SU can improve its datarate by increasing its transmission bandwidth while operating at low power andnot creating destructive interference for PUs. We evaluate system performanceby obtaining an approximation for the actual Bit Error Rate (BER) usingproperties of the Viterbi decoder and carry out a thorough performance analysisin terms of BER and throughput. The results show that the proposed coded systemachieves i) robustness by ensuring that SUs have stable throughput in thepresence of heavy PU interference and ii) improved resiliency of SU links tointerference in the presence of multiple dynamic PUs.

Permutation Trellis Coded Multi-level FSK Signaling to Mitigate Primary User Interference in Cognitive Radio Networks