The search functionality is under construction.

The search functionality is under construction.

In a multiple-user MIMO system in which numerous users simultaneously communicate in a cell, the channel matrix properties depend on the parameters of the individual users in such a way that they can be modeled as points randomly moving within the cell. Although these properties can be simulated by computer, they need to be expressed analytically to develop MIMO systems with diversity. Given a small area with an equivalent multi-path, we assume that a user *u* is at a certain “user point” $P^u(lambda _p^u,xi _p^u)$ in a cell, or (radius $lambda _p^u$ from origin, angle $xi _p^u)$ and that the user moves with movement $M^u(f_{max}^u, xi_v^u)$ around that point, or (Doppler frequency $f_{max}^u$, direction $xi_v^u$). The MU-MIMO channel model consists of a multipath environment, user parameters, and antenna configuration. A general formula of the correlation $
ho_{i - j,i' - j'}^{u - u'} (bm)$ between the channel matrix elements of users *u* and *u'* and one for given multipath conditions are derived. As a feature of the MU-MIMO channel, the movement factor $F^{u - u'}(gamma^u,xi_n ,xi_v^u)$, which means a fall coefficient of the spatial correlation calculated from only the user points of *u* and *u'*, is also derived. As the difference in speed or direction between *u* and *u'* increases, $F^{u - u'}(gamma^u,xi_n ,xi_v^u)$ becomes smaller. Consequently, even if the path is LOS, $
ho_{i - j,i' - j'}^{u - u'} (bm)$ becomes low enough owing to the movement factor, even though the correlation in the single-user MIMO channel is high. If the parameters of *u* and *u'* are the same, the factor equals 1, and the channels correspond to the users' own channels and work like SU-MIMO channel. These analytical findings are verified by computer simulation.

- Publication
- IEICE TRANSACTIONS on Communications Vol.E103-B No.12 pp.1421-1431

- Publication Date
- 2020/12/01

- Publicized
- 2020/06/22

- Online ISSN
- 1745-1345

- DOI
- 10.1587/transcom.2019EBP3171

- Type of Manuscript
- PAPER

- Category
- Antennas and Propagation

Shigeru KOZONO

Chiba Institute of Technology

Yuya TASHIRO

Chiba Institute of Technology

Yuuki KANEMIYO

Chiba Institute of Technology

Hiroaki NAKABAYASHI

Chiba Institute of Technology

The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.

Copy

Shigeru KOZONO, Yuya TASHIRO, Yuuki KANEMIYO, Hiroaki NAKABAYASHI, "MU-MIMO Channel Model with User Parameters and Correlation between Channel Matrix Elements in Small Area of Multipath Environment" in IEICE TRANSACTIONS on Communications,
vol. E103-B, no. 12, pp. 1421-1431, December 2020, doi: 10.1587/transcom.2019EBP3171.

Abstract: In a multiple-user MIMO system in which numerous users simultaneously communicate in a cell, the channel matrix properties depend on the parameters of the individual users in such a way that they can be modeled as points randomly moving within the cell. Although these properties can be simulated by computer, they need to be expressed analytically to develop MIMO systems with diversity. Given a small area with an equivalent multi-path, we assume that a user *u* is at a certain “user point” $P^u(lambda _p^u,xi _p^u)$ in a cell, or (radius $lambda _p^u$ from origin, angle $xi _p^u)$ and that the user moves with movement $M^u(f_{max}^u, xi_v^u)$ around that point, or (Doppler frequency $f_{max}^u$, direction $xi_v^u$). The MU-MIMO channel model consists of a multipath environment, user parameters, and antenna configuration. A general formula of the correlation $
ho_{i - j,i' - j'}^{u - u'} (bm)$ between the channel matrix elements of users *u* and *u'* and one for given multipath conditions are derived. As a feature of the MU-MIMO channel, the movement factor $F^{u - u'}(gamma^u,xi_n ,xi_v^u)$, which means a fall coefficient of the spatial correlation calculated from only the user points of *u* and *u'*, is also derived. As the difference in speed or direction between *u* and *u'* increases, $F^{u - u'}(gamma^u,xi_n ,xi_v^u)$ becomes smaller. Consequently, even if the path is LOS, $
ho_{i - j,i' - j'}^{u - u'} (bm)$ becomes low enough owing to the movement factor, even though the correlation in the single-user MIMO channel is high. If the parameters of *u* and *u'* are the same, the factor equals 1, and the channels correspond to the users' own channels and work like SU-MIMO channel. These analytical findings are verified by computer simulation.

URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2019EBP3171/_p

Copy

@ARTICLE{e103-b_12_1421,

author={Shigeru KOZONO, Yuya TASHIRO, Yuuki KANEMIYO, Hiroaki NAKABAYASHI, },

journal={IEICE TRANSACTIONS on Communications},

title={MU-MIMO Channel Model with User Parameters and Correlation between Channel Matrix Elements in Small Area of Multipath Environment},

year={2020},

volume={E103-B},

number={12},

pages={1421-1431},

abstract={In a multiple-user MIMO system in which numerous users simultaneously communicate in a cell, the channel matrix properties depend on the parameters of the individual users in such a way that they can be modeled as points randomly moving within the cell. Although these properties can be simulated by computer, they need to be expressed analytically to develop MIMO systems with diversity. Given a small area with an equivalent multi-path, we assume that a user *u* is at a certain “user point” $P^u(lambda _p^u,xi _p^u)$ in a cell, or (radius $lambda _p^u$ from origin, angle $xi _p^u)$ and that the user moves with movement $M^u(f_{max}^u, xi_v^u)$ around that point, or (Doppler frequency $f_{max}^u$, direction $xi_v^u$). The MU-MIMO channel model consists of a multipath environment, user parameters, and antenna configuration. A general formula of the correlation $
ho_{i - j,i' - j'}^{u - u'} (bm)$ between the channel matrix elements of users *u* and *u'* and one for given multipath conditions are derived. As a feature of the MU-MIMO channel, the movement factor $F^{u - u'}(gamma^u,xi_n ,xi_v^u)$, which means a fall coefficient of the spatial correlation calculated from only the user points of *u* and *u'*, is also derived. As the difference in speed or direction between *u* and *u'* increases, $F^{u - u'}(gamma^u,xi_n ,xi_v^u)$ becomes smaller. Consequently, even if the path is LOS, $
ho_{i - j,i' - j'}^{u - u'} (bm)$ becomes low enough owing to the movement factor, even though the correlation in the single-user MIMO channel is high. If the parameters of *u* and *u'* are the same, the factor equals 1, and the channels correspond to the users' own channels and work like SU-MIMO channel. These analytical findings are verified by computer simulation.},

keywords={},

doi={10.1587/transcom.2019EBP3171},

ISSN={1745-1345},

month={December},}

Copy

TY - JOUR

TI - MU-MIMO Channel Model with User Parameters and Correlation between Channel Matrix Elements in Small Area of Multipath Environment

T2 - IEICE TRANSACTIONS on Communications

SP - 1421

EP - 1431

AU - Shigeru KOZONO

AU - Yuya TASHIRO

AU - Yuuki KANEMIYO

AU - Hiroaki NAKABAYASHI

PY - 2020

DO - 10.1587/transcom.2019EBP3171

JO - IEICE TRANSACTIONS on Communications

SN - 1745-1345

VL - E103-B

IS - 12

JA - IEICE TRANSACTIONS on Communications

Y1 - December 2020

AB - In a multiple-user MIMO system in which numerous users simultaneously communicate in a cell, the channel matrix properties depend on the parameters of the individual users in such a way that they can be modeled as points randomly moving within the cell. Although these properties can be simulated by computer, they need to be expressed analytically to develop MIMO systems with diversity. Given a small area with an equivalent multi-path, we assume that a user *u* is at a certain “user point” $P^u(lambda _p^u,xi _p^u)$ in a cell, or (radius $lambda _p^u$ from origin, angle $xi _p^u)$ and that the user moves with movement $M^u(f_{max}^u, xi_v^u)$ around that point, or (Doppler frequency $f_{max}^u$, direction $xi_v^u$). The MU-MIMO channel model consists of a multipath environment, user parameters, and antenna configuration. A general formula of the correlation $
ho_{i - j,i' - j'}^{u - u'} (bm)$ between the channel matrix elements of users *u* and *u'* and one for given multipath conditions are derived. As a feature of the MU-MIMO channel, the movement factor $F^{u - u'}(gamma^u,xi_n ,xi_v^u)$, which means a fall coefficient of the spatial correlation calculated from only the user points of *u* and *u'*, is also derived. As the difference in speed or direction between *u* and *u'* increases, $F^{u - u'}(gamma^u,xi_n ,xi_v^u)$ becomes smaller. Consequently, even if the path is LOS, $
ho_{i - j,i' - j'}^{u - u'} (bm)$ becomes low enough owing to the movement factor, even though the correlation in the single-user MIMO channel is high. If the parameters of *u* and *u'* are the same, the factor equals 1, and the channels correspond to the users' own channels and work like SU-MIMO channel. These analytical findings are verified by computer simulation.

ER -