NDLI: MIMO System with Relative Phase Difference Time-Shift Modulation in Rician Fading Environments

Content Provider	IEEE Xplore Digital Library
Author	Kobayashi, K. Someya, T. Ohtsuki, T. Jarot, S.P.W. Kashima, T.
Copyright Year	2008
Description	Author affiliation: Dept. of Electr. Eng., Tokyo Univ. of Sci., Tokyo (Kobayashi, K.; Someya, T.)
Abstract	In line-of sight (LOS) environments, the performance of Multiple-Input Multiple-Output (MIMO) systems depends largely on the difference of the phase difference of direct paths from transmit antennas to each receive antenna. When the phase difference of direct paths are close to each other, the spatial division multiplexing (SDM) channel is not orthogonal to each other so that the signal detection becomes difficult. In this paper, we propose a MIMO system with relative phase difference time-shift modulation (RPDTM) in Rician fading environments. The proposed scheme transmits independent signals from each antenna at each time slot where relative phase difference between signal constellations used by transmit antennas varies with a pre-determined pattern. This transmission virtually changes the phase difference of direct paths from transmit antennas to each receive antenna without lowering data rate and without knowledge of the channels. In addition, forward error correction coding (ECC) is applied to exploit the time slots where the receiver can detect the signals easily to improve the detection performance. From the results of computer simulation, we show that MIMO system with RPDTM can achieve the better bit error rate (BER) than the conventional MIMO system. We also show that the MEMO system with RPDTM is effective by about Rician factor K = 10 dB.
Starting Page	732
Ending Page	736
File Size	267258
Page Count	5
File Format	PDF
ISBN	9781424420759
DOI	10.1109/ICC.2008.143
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MIMO Phase modulation Rician channels Receiving antennas Transmitting antennas Signal detection Slot antennas Bit error rate OFDM Constellation diagram
Content Type	Text
Resource Type	Article

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