Blind channel identification for OFDM based on subspace decomposition

Qian Xuerong; Zhang Lijun

Volume 24 Issue 11

Nov. 2002

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Qian Xuerong, Zhang Lijun. Blind channel identification for OFDM based on subspace decomposition[J]. Journal of Electronics & Information Technology, 2002, 24(11): 1530-1536.

Citation:

Qian Xuerong, Zhang Lijun. Blind channel identification for OFDM based on subspace decomposition[J]. Journal of Electronics & Information Technology, 2002, 24(11): 1530-1536.

Qian Xuerong, Zhang Lijun. Blind channel identification for OFDM based on subspace decomposition[J]. Journal of Electronics & Information Technology, 2002, 24(11): 1530-1536.

Citation:

Qian Xuerong, Zhang Lijun. Blind channel identification for OFDM based on subspace decomposition[J]. Journal of Electronics & Information Technology, 2002, 24(11): 1530-1536.

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Blind channel identification for OFDM based on subspace decomposition

Received Date: 2001-05-21
Rev Recd Date: 2002-02-07
Publish Date: 2002-11-19

Abstract

Abstract

In this paper, a blind identification algorithm based on subspace decomposition for OFDM channels is proposed. Taking the received OFDM signal as an equivalent Single Input-Multiple Output (SIMO) oversampled signal, the channels parameters are estimated by subspace method.Without any training sequences and periodic pilot signals, blind channel identification for OFDM system is realized. The broadband OFDM mobile communication system usually has a number of subchannels and its channels response period is less than the OFDM symbols period, so it is better to divide the whole system into several subsystems, then each of them can be estimated separately with less complication.

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References(1)

References

R. van Nee, R. Prasad, OFDM for Wireless Multimedia Communications, Boston, London, Artech House 2000, 95-118.[2]J.G. Proakis, Digital Communications, 3rd ed., New York, McGrav Hill, 1995, Ch. 6. ［3］S. Haykin, Adpative Filter Theory, 3rd ed., Englewood Cliffs, Prentice-Hall Inc., 1996, Ch. 18.[3]L. Tong, G. Xu, T. Kailath, Fast blind equalization via antenna arrays, in Proc. ICASSP,Minneapolis, Minnesota, 1993, 4, 272-275.[4]E. Moulines, P. Duhamel, J.-F. Cardoso, S. Mayrargue, Subspace methods for blind identification of multichannel FIR filters, IEEE Trans. on Signal Processing, 1995, SP-43(2), 516-525.

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