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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Wenyi Zhang Mitra, U. |
| Copyright Year | 1972 |
| Abstract | A new approach to cognitive radio based on the premise that the legacy link is not fully loaded by the legacy service is presented. The assumption implies that there is a non-negligible margin to accommodate a cognitive transmission; this accommodation is achieved by spectrum shaping of the cognitive user. Much prior work on cognitive systems captures the effect of interference by the interference power level. In contrast, the current work characterizes interference by its induced degradation on the legacy user. Despite ignorance of the legacy user's message, the spectrum shaped cognitive user can always operate at its full available power. As a result, logarithmic growth of the cognitive transmission rate is achievable. In Part I of this two-part paper, analysis is provided for both scalar and vector system models where the legacy system employs coded transmission (Part II examines analog legacy users). The logarithmic growth rates, i.e., the prelog coefficients, of cognitive transmission rates in the high-power regime, are established for both the scalar and vector system models considered. |
| File Size | 466512 |
| File Format | |
| ISSN | 00906778 |
| Volume Number | 58 |
| Issue Number | 6 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Cognitive radio TV broadcasting Power system modeling Transceivers Satellite broadcasting Interference constraints Degradation MIMO Digital relays Communications Society Cognitive radio, legacy system, multiple antennae, power spectral density, prelog coefficient, spatial nulling, spectrum shaping. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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