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                          <header>
                              <identifier>oai:research.chalmers.se:506296</identifier>
                              <datestamp>2018-12-14T17:28:08Z</datestamp>
                              <setSpec>openaire</setSpec>
                          </header>
                          <metadata>
                              <oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
                                  <dc:title>Optimal Precoders for Tracking the AoD and AoA of a mmWave Path</dc:title>
                                  <dc:identifier>https://research.chalmers.se/en/publication/e25fa4e9-269f-4012-adea-12fd198fc3de</dc:identifier>
                                  <dc:date>2018</dc:date>
                                              <dc:creator>Garcia, Nil</dc:creator>
                                              <dc:creator>Wymeersch, Henk</dc:creator>
                                              <dc:creator>Slock, Dirk</dc:creator>
                                                  <dc:subject>Signal Processing</dc:subject>
                                              <dc:subject>Transmitters</dc:subject>
                                              <dc:subject>Uncertainty</dc:subject>
                                              <dc:subject>Millimeter wave communication</dc:subject>
                                              <dc:subject>Receivers</dc:subject>
                                              <dc:subject>precoding</dc:subject>
                                              <dc:subject>Radar tracking</dc:subject>
                                              <dc:subject>antenna radiation patterns</dc:subject>
                                              <dc:subject>Signal to noise ratio</dc:subject>
                                              <dc:subject>Channel estimation</dc:subject>
                                              <dc:subject>Estimation</dc:subject>
                                              <dc:subject>array signal processing</dc:subject>
                                              <dc:subject>antenna arrays</dc:subject>
                                              <dc:subject>optimization</dc:subject>
                                              <dc:subject>Cramér–Rao bounds</dc:subject>
                                          <dc:description>In millimeter-wave channels, most of the received energy is carried by a few paths. Traditional precoders sweep the angle-of-departure (AoD) and angle-of-arrival (AoA) space with directional precoders to identify directions with largest power. Such precoders are heuristic and lead to suboptimal AoD/AoA estimation. We derive optimal precoders, minimizing the Cramér–Rao bound (CRB) of the AoD/AoA under a given uncertainty range, assuming a fully digital architecture at the transmitter and spatial filtering of a single path. The precoders are found by solving a suitable convex optimization problem. We demonstrate that the accuracy can be improved by at least a factor of two over traditional precoders, and show that there is an optimal number of distinct precoders beyond which the CRB does not improve.</dc:description>
                                                                  <dc:relation>info:eu-repo/grantAgreement/5GCAR//Fifth Generation Communication Automotive Research and innovation (5GCAR)/</dc:relation>
                                                                  <dc:relation>info:eu-repo/grantAgreement/636537-HIGHTS-RIA//High precision positioning for cooperative ITS applications/</dc:relation>
                                                  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1109/TSP.2018.2870368</dc:relation>
                                          <dc:type>info:eu-repo/semantics/article</dc:type>
                                          <dc:source>IEEE Transactions on Signal Processing (1053-587X) vol.66(2018)</dc:source>
                                                      <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:language>eng</dc:language>
                                  <dc:audience>Researchers</dc:audience>
                                  <dc:format>application/pdf</dc:format>
                              </oai_dc:dc>
                          </metadata>
                      </record>