Title :
Analysis of pilots for residual frequency offset estimation in MIMO OFDM systems
Author :
Aoki, Tsuguhide ; Sandell, Magnus
Author_Institution :
Corp. Res.&Dev. Center, Toshiba Corp., Kawasaki
fDate :
3/1/2009 12:00:00 AM
Abstract :
This paper analyses the estimation of residual frequency offset in MIMO OFDM systems using pilot subcarriers embedded in the data payload. A closed-form expression for the MSE is derived and it shows how the frequency and spatial correlation influence performance. It is also shown that an orthogonal design ensures robust performance, which is independent of the frequency correlation of the channel.
Keywords :
MIMO communication; OFDM modulation; frequency estimation; mean square error methods; MIMO OFDM system; MSE; channel frequency correlation; closed-form expression; data payload; orthogonal design; residual frequency offset estimation; spatial correlation; Closed-form solution; Frequency estimation; MIMO; Maximum likelihood estimation; OFDM; Payloads; Performance analysis; Receiving antennas; Robustness; Transmitting antennas; MIMO; OFDM; frequency offset; pilot;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2009.090311
