?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Block-Level+Interference+Exploitation+Precoding+without+Symbol-by-Symbol+Optimization&rft.creator=Li%2C+A&rft.creator=Shen%2C+C&rft.creator=Liao%2C+X&rft.creator=Masouros%2C+C&rft.creator=Swindlehurst%2C+AL&rft.description=Symbol-level+precoding+(SLP)+based+on+the+concept+of+constructive+interference+(CI)+is+shown+to+be+superior+to+traditional+block-level+precoding+(BLP)%2C+however+at+the+cost+of+a+symbol-by-symbol+optimization+during+the+precoding+design.+In+this+paper%2C+we+propose+a+CI-based+block-level+precoding+(CI-BLP)+scheme+for+the+downlink+transmission+of+a+multi-user+multiple-input+single-output+(MU-MISO)+communication+system%2C+where+we+design+a+constant+precoding+matrix+to+a+block+of+symbol+slots+to+exploit+CI+for+each+symbol+slot+simultaneously.+A+single+optimization+problem+is+formulated+to+maximize+the+minimum+CI+effect+over+the+entire+block%2C+thus+reducing+the+computational+cost+of+traditional+SLP+as+the+optimization+problem+only+needs+to+be+solved+once+per+block.+By+leveraging+the+Karush-Kuhn-Tucker+(KKT)+conditions+and+the+dual+problem+formulation%2C+the+original+optimization+problem+is+finally+shown+to+be+equivalent+to+a+quadratic+programming+(QP)+over+a+simplex.+Numerical+results+validate+our+derivations+and+exhibit+superior+performance+for+the+proposed+CI-BLP+scheme+over+traditional+BLP+and+SLP+methods%2C+thanks+to+the+relaxed+block-level+power+constraint.&rft.subject=MIMO%2C+symbol-level+precoding%2C+constructive%0D%0Ainterference%2C+interference+exploitation%2C+optimization&rft.publisher=IEEE&rft.date=2023-05-12&rft.type=Proceedings+paper&rft.language=eng&rft.source=+++++In%3A++2023+IEEE+Wireless+Communications+and+Networking+Conference+(WCNC).++++IEEE%3A+Glasgow%2C+United+Kingdom.+(2023)+++++&rft.format=application%2Fpdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10185502%2F1%2F2203.12502.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10185502%2F&rft.rights=open