{"id":4127,"date":"2025-10-21T00:33:03","date_gmt":"2025-10-21T00:33:03","guid":{"rendered":"https:\/\/172-234-197-23.ip.linodeusercontent.com\/?page_id=4127"},"modified":"2025-10-21T00:33:03","modified_gmt":"2025-10-21T00:33:03","slug":"position-estimation-baselines-for-rf-when-df-tdoa-is-absent","status":"publish","type":"page","link":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/?page_id=4127","title":{"rendered":"Position Estimation Baselines for RF (when DF\/TDOA is absent)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Position Estimation Baselines for RF (when<br>DF\/TDOA is absent)<\/p>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/wp-content\/uploads\/2025\/10\/TDOA-is-absent.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Embed of TDOA is absent.\"><\/object><a id=\"wp-block-file--media-b7be86d8-c17f-455c-9880-e6596ae180ad\" href=\"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/wp-content\/uploads\/2025\/10\/TDOA-is-absent.pdf\">TDOA is absent<\/a><a href=\"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/wp-content\/uploads\/2025\/10\/TDOA-is-absent.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-b7be86d8-c17f-455c-9880-e6596ae180ad\">Download<\/a><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">When direction finding (DF) or time-difference-ofarrival (TDOA) is absent, teams sometimes adopt a frequencyproxy (FP) position estimate: mapping observed frequency shifts to<br>range and projecting onto a kinematic prior. We show this is a poor<br>baseline: it is systematically biased under oscillator offsets, CFO<br>jitter, and multipath, and it degrades sharply with modest carrier<br>frequency instability. Across a mixed-motion suite, FP trails a<br>simple constant-velocity (CV) prior and a fused learned+kinematic<br>upper bound by 18.4% in ADE@1, with higher signed bias (2.1 m).<br>We release a tiny, reproducible baseline harness and advocate for<br>stronger ablations than FP in RF tracking work.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Position Estimation Baselines for RF (whenDF\/TDOA is absent) When direction finding (DF) or time-difference-ofarrival (TDOA) is absent, teams sometimes adopt a frequencyproxy (FP) position estimate: mapping observed frequency shifts torange and projecting onto a kinematic prior. We show this is a poorbaseline: it is systematically biased under oscillator offsets, CFOjitter, and multipath, and it degrades&hellip;&nbsp;<\/p>\n","protected":false},"author":2,"featured_media":4129,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"class_list":["post-4127","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/index.php?rest_route=\/wp\/v2\/pages\/4127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4127"}],"version-history":[{"count":0,"href":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/index.php?rest_route=\/wp\/v2\/pages\/4127\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/index.php?rest_route=\/wp\/v2\/media\/4129"}],"wp:attachment":[{"href":"https:\/\/neurosphere-2.tail52f848.ts.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}