?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Efficient+downlink+channel+reconstruction+for+FDD+transmission+systems&rft.creator=Han%2C+Y&rft.creator=Hsu%2C+T-H&rft.creator=Wen%2C+C-K&rft.creator=Wong%2C+K-K&rft.creator=Jin%2C+S&rft.description=In+this+paper%2C+a+novel+scheme+is+proposed+to+reconstruct+downlink+channel+for+frequency-division-duplex+(FDD)+systems+from+uplink+channel+state+information+(CSI)+with+limited+feedback.+We+adopt+the+Newtonized+orthogonal+matching+pursuit+(NOMP)+algorithm+to+estimate+the+frequency-independent+parameters+of+the+delays+of+a+multi-path+channel+through+uplink+training.+The+gain+of+each+path+is+further+refined+through+downlink+training+using+least+squares+(LS)+algorithm+and+sent+back+to+the+base+station+(BS).+Using+the+uplink-estimated+delays+and+the+downlink-refined+gains%2C+the+BS+reconstructs+the+downlink+multipath+channel.+Simulations+and+over-the-air+tests+are+conducted+to+examine+the+performance+of+the+proposed+NOMP-LS-based+reconstruction+scheme+for+the+downlink+channel.+Results+confirm+the+effectiveness+of+the+NOMP-LS+scheme+and+that+the+reconstructed+channel+is+accurate.&rft.subject=Downlink%2C+Uplink%2C+Delays%2C+Training%2C+OFDM%2C+Channel+estimation%2C+Estimation&rft.publisher=IEEE&rft.date=2018-06-07&rft.type=Proceedings+paper&rft.language=eng&rft.source=+++++In%3A++Proceedings+of+the+27th+Wireless+and+Optical+Communication+Conference+(WOCC+2018).++++IEEE+(2018)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10055173%2F1%2FWong_Efficient%2520downlink%2520channel%2520reconstruction%2520for%2520FDD%2520transmission%2520systems_AAM.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10055173%2F&rft.rights=open