Channel estimation for MIMO-OFDM using complementary codes


Journal Article

We present a pilot-assisted method for estimating the frequency selective channel in a MIMO-OFDM (Multiple Input Multiple Output - Orthogonal Frequency Division Multiplexing) system. The pilot sequence is designed using the DFT (Discrete Fourier Transform) of the Golay complementary sequences. Novel exploitation of the perfect autocorrelation property of the Golay codes, in conjunction with OSTBC (Orthogonal Space-Time Block Code) based pilot waveform scheduling across multiple OFDM frames, facilitates simple separation of the channel mixtures at the receive antennas. The DFT length used to transform the complementary sequence into the frequency domain is shown to be a key critical parameter for correctly estimating the channel. NMSE (Normalized Mean Squared Error) between the actual and the estimated channel is used to characterize the estimation performance. ©2009 IEEE.

Full Text

Duke Authors

Cited Authors

  • Zoltowski, MD; Qureshi, TR; Calderbank, R

Published Date

  • July 21, 2009

Published In

  • Rws 2009 Ieee Radio and Wireless Symposium, Proceedings

Start / End Page

  • 159 - 162

Digital Object Identifier (DOI)

  • 10.1109/RWS.2009.4957309

Citation Source

  • Scopus