Abstract
Interference management is a key issue for radar-communication spectrum sharing. Degrees of Freedom (DoF) is a powerful tool to analyze and evaluate the performance of techniques in multi-user interference management scenarios. However, DoF have been studied in detail in communications systems but rarely considered in radar literature. In this paper, we propose a definition of DoF for radar using Rényi information dimension. The definition and properties of Rényi entropy and information dimension are considered. The relationships among radar DoF, diversity order, and diversity gain are studied as well. It is shown that radar diversity gain is controlled by radar DoF such that maximizing DoF leads to maximizing available diversity gain under Neyman-Pearson detection strategy. When exponential distribution assumption is applied, radar DoF equals to diversity gain. The single-user DoF upper bound is established as well. We also proposed a DoF formula for K-{c}+K-{r} -users radar-communication interference channel. It is shown that interference alignment strategy [1] still works well in K-{c}+K-{r} -users radar-communication interference channel.
Original language | English |
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Title of host publication | Conference of the 52nd Asilomar Conference on Signals, Systems and Computers, ACSSC 2018 |
Editors | Michael B. Matthews |
Publisher | IEEE |
Pages | 403-408 |
Number of pages | 6 |
ISBN (Electronic) | 9781538692189 |
DOIs | |
Publication status | Published - 2018 |
MoE publication type | A4 Conference publication |
Event | Asilomar Conference on Signals, Systems & Computers - Pacific Grove, United States Duration: 28 Oct 2018 → 31 Oct 2018 Conference number: 52 |
Publication series
Name | Asilomar Conference on Signals, Systems, and Computers proceedings |
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ISSN (Electronic) | 1058-6393 |
Conference
Conference | Asilomar Conference on Signals, Systems & Computers |
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Abbreviated title | ACSSC |
Country/Territory | United States |
City | Pacific Grove |
Period | 28/10/2018 → 31/10/2018 |
Keywords
- degrees of freedom
- information dimension
- interference alignment
- radar DoF
- radar-communication coexistence
- spectrum sharing