?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Liu%2C+Lu&rft.aufirst=Lu&rft.aulast=Liu&rft.issue=2&rft.issn=1536-1276&rft.date=February+2024&rft.pages=1403-1415&rft.title=IEEE+Transactions+on+Wireless+Communications&rft.volume=23&rft.atitle=Robust+Symbol+Level+Precoding+for+Overlay+Cognitive+Radio+Networks&rft.genre=article