{"id":74,"date":"2026-03-03T15:38:10","date_gmt":"2026-03-03T15:38:10","guid":{"rendered":"http:\/\/tdc4isac.org\/?p=74"},"modified":"2026-03-03T15:38:10","modified_gmt":"2026-03-03T15:38:10","slug":"high-resolution-sampling-of-uwb-radar-echoes-using-waveform-crossing-and-tdc-techniques","status":"publish","type":"post","link":"http:\/\/tdc4isac.org\/index.php\/2026\/03\/03\/high-resolution-sampling-of-uwb-radar-echoes-using-waveform-crossing-and-tdc-techniques\/","title":{"rendered":"High-Resolution Sampling of UWB Radar Echoes Using Waveform Crossing and TDC Techniques"},"content":{"rendered":"\n<p>R. Barkans, S. Migla, N. Tihomorskis, J. Ratners, V. Kurtenoks and A. Aboltins, &#8220;High-Resolution Sampling of UWB Radar Echoes Using Waveform Crossing and TDC Techniques,&#8221; <em>2025 Photonics &amp; Electromagnetics Research Symposium &#8211; Fall (PIERS-Fall)<\/em>, Chiba, Japan, 2025, pp. 1-5, doi: 10.23919\/PIERS-Fall62445.2025.11394564.<\/p>\n\n\n\n<p><strong>Abstract:<\/strong><br>To provide a millimeter-range spatial resolution of UWB radar, the received down-converted echoes must be sampled at rates above 50GSa\/s. Employing regular (ADC)-based sampling techniques at such high sampling rates leads to extremely high costs and power consumption for radar systems. Employing time-to-digital conversion in radars instead of analog-to-digital conversion opens new possibilities for high-bandwidth signal acquisition. Widely available commercial time-to-digital converters (TDCs) provide single-shot time resolution in the range of 20\u221250ps, which leads to a spatial resolution of 6\u221210mm. The mentioned technique is widely used in LiDAR; however, due to the complex nature of echoes, it cannot be directly applied to radar systems. As TDC provides information about single threshold level crossing, straightforward employment of TDC leads to a very low dynamic range of a sampler, low sensitivity and worsened signal-to-noise ratio (SNR). To increase the dynamic range of the TDC-based sampler, the authors explore using radar echo crossing with an alternating sampling waveform of a much lower frequency to obtain amplitude and timing information. In this research, the authors explore time-domain (TD) sampling using a custom 4-channel time tagger based on ScioSense GPX2 chips in conjunction with an envelope detector and a custom comparator board driven by a 1.266 MHz sawtooth waveform for stroboscopic sampling of 28 GHz pulsed radar echoes arriving with a period of 160 ns. Research is devoted to designing novel signal acquisition methods and signal processing techniques for radar envelope reconstruction and exploring the techniques&#8217; limitations in communication and sensing applications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>R. Barkans, S. Migla, N. Tihomorskis, J. Ratners, V. Kurtenoks and A. Aboltins, &#8220;High-Resolution Sampling of UWB Radar Echoes Using Waveform Crossing and TDC Techniques,&#8221; 2025 Photonics &amp; Electromagnetics Research Symposium &#8211; Fall (PIERS-Fall), Chiba, Japan, 2025, pp. 1-5, doi: 10.23919\/PIERS-Fall62445.2025.11394564. Abstract:To provide a millimeter-range spatial resolution of UWB radar, the received down-converted echoes must [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,26,7,25],"tags":[39,43,42,41,40,47,48,44,46,45],"class_list":["post-74","post","type-post","status-publish","format-standard","hentry","category-article","category-conference","category-event","category-research","tag-accuracy","tag-distance-measurement","tag-dynamic-range","tag-radar","tag-sensitivity","tag-signal-resolution","tag-signal-to-noise-ratio","tag-spatial-resolution","tag-time-domain-analysis","tag-ultra-wideband-radar"],"_links":{"self":[{"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/posts\/74","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/comments?post=74"}],"version-history":[{"count":1,"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/posts\/74\/revisions"}],"predecessor-version":[{"id":75,"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/posts\/74\/revisions\/75"}],"wp:attachment":[{"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/media?parent=74"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/categories?post=74"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/tdc4isac.org\/index.php\/wp-json\/wp\/v2\/tags?post=74"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}