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发表于 2006-7-5 14:25:00
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【文件名】:0675@52RD_ems with frenquency domain spreading_200_ieee .rar
【格 式】:rar
【大 小】:389K
【简 介】:Abstract—The problem of bandwidth efficient data transmission
in multiple antenna orthogonal frequency division multiplex
(OFDM) systems is considered. Contrary to the mono-sensor
systems, the effects of frequency-selective fading may be compensated
in the multiple antenna systems due to the space diversity
without using a wireless overhead. A modulation scheme that
improves the reliability of data transmission in fading multipath
environments and performs an accurate channel equalization with
no excess bandwidth neither substantial training is proposed. The
new scheme exploits a frequency domain spreading along with the
standard OFDM modulation. This modulation yields an improved
error rate; its structure is also exploited to estimate the equalizer.
The problem of reliable channel equalization in such systems is
shown to be essentially different in single and multiple antenna
scenarios. For the multiple antenna scenario, a new approach to
robust equalization is proposed, and its performance is analyzed.
The numerical study confirms the efficiency of the new method in
such bandwidth-expensive applications as wireless networks.
Index Terms—Adaptive antennas, blind equalization, broadband
wireless, multicarrier systems.
【目 录】:
I. INTRODUCTION
II. SYSTEM MODEL AND ASSUMPTIONS
III. BLIND EQUALIZATION AND SYNCHRONIZATION
IV. ROBUST ESTIMATOR IN THE SIMO CASE
VI. PERFORMANCE IN FADING MULTIPATH ENVIRONMENTS
VII. SUMMARY AND DISCUSSIONS
V. STATISTICAL ANALYSIS
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