# 4.6 Simulation radius (ILT-VLR)

The distance between the Victim link receiver and the Interfering link transmitter is referred to as the **simulation radius** (see ANNEX 13:**)**. It can be defined as shown in Figure 117.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/AXHxWiUXVnRPafzK-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/AXHxWiUXVnRPafzK-image.png)

<div class="rich-media-item mediaSingleView-content-wrap image-align-start css-31l4yw" data-layout="align-start" data-media-vc-wrapper="true" data-node-type="mediaSingle" data-renderer-start-pos="185" data-vc="media-single" data-width="316" data-width-type="pixel" id="bkmrk-figure-117%3A-definiti"><div class="css-s2fkqu"><div data-alt="" data-collection="contentId-494257" data-context-id="494257" data-file-mime-type="" data-file-name="file" data-file-size="1" data-height="363" data-id="d11a6f3c-a7cf-4727-8032-05a106135ca6" data-node-type="media" data-renderer-start-pos="186" data-type="file" data-width="460"><div class="_2rko18qm _vchhusvi _kqswh2mm _ect4ttxp _p12f1osq _c71l1osq _1bsb1qmm _4t3ine4n _1hlmd0i9 _1rquusvi _eg541i5c _mts3kb7n _1ntskb7n _yfmhtlke _5sb1v00u new-file-experience-wrapper" data-media-vc-wrapper="true" data-testid="media-card-view" id="bkmrk-figure-117%3A-definiti-1"><div class="_1reo15vq _18m915vq _2rko18qm _1e0c1txw _kqswh2mm _p12f1osq _1bsb1osq _4t3i1osq _c71l1osq media-file-card-view" data-cursor="pointer" data-test-media-name="117.png" data-test-progress="1" data-test-source="remote" data-test-status="complete" data-testid="media-file-card-view"><div class="_kqswstnw _1bsb1osq _4t3i1osq _1e0c1txw _2lx21bp4 _1bah1h6o _4cvr1h6o align-center" data-testid="ImageRendererWrapper">![](blob:https://ecowiki.atlassian.net/c8c6bb04-d88f-4112-9b76-cd94532fe43e#media-blob-url=true&id=d11a6f3c-a7cf-4727-8032-05a106135ca6&collection=contentId-494257&contextId=494257&width=460&height=363&alt=&clientId=113268fe-fe5b-4bc3-8ff3-07965dbf1d18)**Figure 117: Definition of the minimum distance**</div></div></div></div></div></div>Using this feature, the interfering link transmitter is located between 1 km (0.1 x 10 km) and 10 km (1 x 10 km) from the Victim link receiver as shown in the SEAMCAT display in Figure 118.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/PJnf8gxRGbfbLRio-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/PJnf8gxRGbfbLRio-image.png)![](blob:https://ecowiki.atlassian.net/714d6d34-a1fd-4085-96f1-9c5f9a0ecf8a#media-blob-url=true&id=8757382f-dacc-4ce8-9e89-42a91d4dca05&collection=contentId-494257&contextId=494257&width=798&height=476&alt=&clientId=113268fe-fe5b-4bc3-8ff3-07965dbf1d18)**Figure 118: SEAMCAT display of the minimum distance**

(<span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">ILT</span></span></span>-red, <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">ILR</span></span></span>-green, <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">VLR</span></span></span>-yellow, <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">VLT</span></span></span>-blue)

If the interefering link transmitter is located at 10 km, it is possible to derive the iRSS<sub data-renderer-mark="true">unwanted</sub>:

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/2b9EHgA9tp6b4UcX-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/2b9EHgA9tp6b4UcX-image.png)

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/ZL3CIi7kJXbTBGeY-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/ZL3CIi7kJXbTBGeY-image.png)

<div class="fabric-editor-block-mark fabric-editor-alignment" data-align="center" id="bkmrk-%C2%A0-%C2%A0-%C2%A0-%C2%A0-%C2%A0-%C2%A0-%C2%A0-%C2%A0-%C2%A0-%C2%A0-"><div class="inline-extension-renderer css-e2q2ep"><div class="_kqswh2mm" data-testid="ForgeExtensionContainer"><div class="_19itglyw _vchhusvi _r06hglyw _kqswh2mm" data-testid="hosted-resources-iframe-container"><div class="_19itglyw _vchhusvi _r06hglyw _kqswh2mm align-center">  
</div></div></div></div> </div>If the interefering link transmitter is located at 1 km:

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/6MsuO8ypcS4wqPTU-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/6MsuO8ypcS4wqPTU-image.png)

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/raQtskKNclLPCOjJ-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/raQtskKNclLPCOjJ-image.png)

The iRSS<sub data-renderer-mark="true">unwanted</sub> extends from -59.5 dBm to -39.5 dBm as confirmed by Figure 119.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/UOB88eJnGy75zK7F-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/UOB88eJnGy75zK7F-image.png)

<div class="rich-media-item mediaSingleView-content-wrap image-align-start css-1fcvn4m" data-layout="align-start" data-media-vc-wrapper="true" data-node-type="mediaSingle" data-renderer-start-pos="830" data-vc="media-single" data-width="463" data-width-type="pixel" id="bkmrk-figure-119%3A-irssunwa"><div class="css-lxubws"><div data-alt="" data-collection="contentId-494257" data-context-id="494257" data-file-mime-type="" data-file-name="file" data-file-size="1" data-height="475" data-id="a484a000-9e67-4171-bcd8-f6a545f13430" data-node-type="media" data-renderer-start-pos="831" data-type="file" data-width="880"><div class="_2rko18qm _vchhusvi _kqswh2mm _ect4ttxp _p12f1osq _c71l1osq _1bsb1qmm _4t3ine4n _1hlmd0i9 _1rquusvi _eg541i5c _mts3kb7n _1ntskb7n _yfmhtlke _5sb1v00u new-file-experience-wrapper" data-media-vc-wrapper="true" data-testid="media-card-view" id="bkmrk-figure-119%3A-irssunwa-1"><div class="_1reo15vq _18m915vq _2rko18qm _1e0c1txw _kqswh2mm _p12f1osq _1bsb1osq _4t3i1osq _c71l1osq media-file-card-view" data-cursor="pointer" data-test-media-name="119.png" data-test-progress="1" data-test-source="remote" data-test-status="complete" data-testid="media-file-card-view"><div class="_kqswstnw _1bsb1osq _4t3i1osq _1e0c1txw _2lx21bp4 _1bah1h6o _4cvr1h6o align-center" data-testid="ImageRendererWrapper">![](blob:https://ecowiki.atlassian.net/5ad3ba99-b71b-43d9-96a9-e1f3042a61e8#media-blob-url=true&id=a484a000-9e67-4171-bcd8-f6a545f13430&collection=contentId-494257&contextId=494257&width=880&height=475&alt=&clientId=113268fe-fe5b-4bc3-8ff3-07965dbf1d18)**Figure 119: iRSS<sub data-renderer-mark="true">unwanted</sub>**</div></div></div></div></div></div>