S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Others_전기·정보공학부
An orthogonal multi-beam based MIMO scheme for multi-user wireless systems
- Oh, Dong-Chan; Lee, Yong-Hwan
- Issue Date
- 통신정보 합동학술대회 (JCCI), 2005년 4월
- In this paper, we propose a multiple-access transmission scheme that can simultaneously achieve both diversity and
multiplexing gain in the multi-user multi-input multi-output (MIMO) domain, by using orthogonal multiple random beams.
Orthogonal multiple beams are generated so that the users encounter multiple channels at the same time, enabling the use of
multi-user diversity through each channel. Although the signal-to-noise power ratio (SNR) of each channel is reduced in
proportion to the number of beams, multiple beams are utilized so that the multiplexing gain is larger than the decrease of
SNR, increasing the overall system capacity. The proposed scheme can generate spatial channels as many as the number of
transmit antennas regardless of the number of receiver antennas, while requiring partial channel information at the
transmitter. Thus, the proposed scheme is applicable to multi-input single-output (MISO) schemes as well as MIMO
schemes, enabling the use of flexible antenna structures in the receiver.
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