A Carrier Interferometry Based Channel Estimation Technique for MIMO-OFDM/TDMA Systems

Seiichi SAMPEI
Hiroshi HARADA

IEICE TRANSACTIONS on Communications   Vol.E90-B    No.5    pp.1181-1192
Publication Date: 2007/05/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.5.1181
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
DPC-OF/TDMA systems,  MIMO-OFDM/TDMA systems,  channel estimation,  carrier interferometry,  time window,  

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This paper proposes a channel estimation technique for the dynamic parameter controlled--orthogonal frequency and time division multiple access (DPC-OF/TDMA) systems studied as one of the candidates of the beyond third generation (B3G) systems. In the proposed scheme, the impulse response, which represents the channel state information (CSI) is estimated using carrier interferometry (CI) which is equivalent to impulse signal transmission. Moreover, because the minimum number of subcarriers allocated to terminals is 64, in order to estimate a CSI with its spreading factor of 64, we employ a code-multiplexed CI signal for a cell search process and a time-domain-multiplexed CI signal for transmit antenna identification. Furthermore, we also propose a flexible CSI estimation scheme that supports two cases: multiple subchannel block assignment and MIMO transmission cases. Computer simulation confirms that the proposed scheme can estimate the CSI with high accuracy.