Presentation	2000/7/11 Iterative Decision-Directed Path Search and Channel Estimation with Fast Fading Tracking Ability for MC/DS-CDMA Broadband Packet Wireless Access Shingo Suwa, Hiroyuki Atarashi, Sadayuki Abeta, Mamoru Sawahashi,
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Abstract(in English)	This paper presented the appropriate frame structure based on pilot symbols and channel estimation filter of iterative decision-directed path search and channel estimation method in order to improve the tracking ability in a fast fading environment for MC/DS-CDMA broadband packet wireless access. Computer simulation results demonstrated that, when the pilot symbols are time-multiplexed at both the beginning and the end of a packet using the channel estimation filter with which scheme was changed from the total packet length averaging for less than 2nd iteration and the block averaging over 1/4 length of packet length for more than 3rd iteration, i.e., q_=3, almost constant average received E_b/N_0 performance was achieved in the wide region of maximum Doppler frequency f_D=40-1000Hz. Compared with the case of time-multiplexed symbols at the beginning of a packet and q_=∞, the required average received E_b/N_0 for achieving the average packet error rate (PER)=10^<-2> could be improved by approximately 3 dB at f_D=800Hz, for the number of sub-carriers N_0=1, under an equal level 24-path Rayleigh fading channel with the total number of pilot symbols of 64 and the number of iterations of 3.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	iterative decision-directed path search and channel estimation / fast fading tracking ability / pilot frame structure / channel estimation filter
Paper #	SSE2000-78, RCS2000-67
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Conference Information
Committee	SSE
Conference Date	2000/7/11(1days)
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Paper Information
Registration To	Switching Systems Engineering (SSE)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Iterative Decision-Directed Path Search and Channel Estimation with Fast Fading Tracking Ability for MC/DS-CDMA Broadband Packet Wireless Access
Sub Title (in English)
Keyword(1)	iterative decision-directed path search and channel estimation
Keyword(2)	fast fading tracking ability
Keyword(3)	pilot frame structure
Keyword(4)	channel estimation filter
1st Author's Name	Shingo Suwa
1st Author's Affiliation	Wireless Research Laboratories, NTT DoCoMo, Inc.()
2nd Author's Name	Hiroyuki Atarashi
2nd Author's Affiliation	Wireless Research Laboratories, NTT DoCoMo, Inc.
3rd Author's Name	Sadayuki Abeta
3rd Author's Affiliation	Wireless Research Laboratories, NTT DoCoMo, Inc.
4th Author's Name	Mamoru Sawahashi
4th Author's Affiliation	Wireless Research Laboratories, NTT DoCoMo, Inc.
Date	2000/7/11
Paper #	SSE2000-78, RCS2000-67
Volume (vol)	vol.100
Number (no)	192
Page	pp.pp.-
#Pages	7
Date of Issue