Open AccessChannel Estimation Scheme for WLAN Systems with Backward Compatibility
Author(s) -
Kim JeeHoon,
Yu Heejung,
Lee SokKyu
Publication year - 2012
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.12.0211.0353
Subject(s) - backward compatibility , compatibility (geochemistry) , computer science , electronic engineering , channel (broadcasting) , scheme (mathematics) , throughput , mean squared error , engineering , wireless , computer network , telecommunications , mathematics , mathematical analysis , chemical engineering , statistics
IEEE 802.11n standards introduced a mixed‐mode format frame structure to achieve higher throughput with multiple antennas while providing backward compatibility with legacy systems. Although multi‐input multi‐output channel estimation was possible only with high‐throughput long training fields (HT‐LTFs), the proposed scheme utilizes a legacy LTF as well as HT‐LTFs in a decision feedback manner to improve the accuracy of the estimates. It was verified through theoretical analysis and simulations that the proposed scheme effectively enhances the mean square error performance.