Presentation	2003/7/8 Performance Analysis of an MC-CDMA/TDD Uplink System with Pre-Equalization in a Highly Time-Varying Channel Seong Keun Oh, Ki Ho Nam, Myung Hoon Sunwoo,
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Abstract(in English)	We deal with channel estimation for an MC-CDMA/TDD uplink system with pre-equalization in a highly time-varying channel. First, the time variation of the channel state information (CSI) during a downlink slot is approximated to a polynomial with a proper order. Then, the CSI during the consecutive uplink slot is estimated by simply extending the polynomial to the uplink slot interval. The time variation of the downlink CSI can be approximated to a 1^, 2^, or 3^-order polynomial by using the minimum mean squared error (MMSE) curve fitting method or the Lagrange interpolation method. We use the bit error rate as a proper system performance measure. Through extensive simulations, we conclude that the 2^-order polynomial approximation scheme based on the MMSE curve fitting works well under various system and channel conditions, and is quite robust to the downlink channel estimation error.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	MC-CDMA / TDD / Channel estimation / Pre-equalization
Paper #	MoMuC2003-13
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Committee	MoMuC
Conference Date	2003/7/8(1days)
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Paper Information
Registration To	Mobile Multimedia Communications(MoMuC)
Language	ENG
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Performance Analysis of an MC-CDMA/TDD Uplink System with Pre-Equalization in a Highly Time-Varying Channel
Sub Title (in English)
Keyword(1)	MC-CDMA
Keyword(2)	TDD
Keyword(3)	Channel estimation
Keyword(4)	Pre-equalization
1st Author's Name	Seong Keun Oh
1st Author's Affiliation	School of Electrical and Computer Engineering, Ajou University()
2nd Author's Name	Ki Ho Nam
2nd Author's Affiliation	School of Electrical and Computer Engineering, Ajou University
3rd Author's Name	Myung Hoon Sunwoo
3rd Author's Affiliation	School of Electrical and Computer Engineering, Ajou University
Date	2003/7/8
Paper #	MoMuC2003-13
Volume (vol)	vol.103
Number (no)	187
Page	pp.pp.-
#Pages	5
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