Paper Abstract and Keywords |
Presentation |
2017-09-08 13:55
Overloaded MIMO System with Orthogonal Codes Kei Nakahara, Yukitoshi Sanada (Keio Univ.) |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
This paper presents an overloaded multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) scheme that realizes signal separation among terminals by orthogonal codes. In multi-user MIMO systems, block diagonalization has been well investigated. However, the calculation of weight coefficients requires the channel state information (CSI) of all the terminals. The accurate CSI feedback needs a large amount of frequency resources. In addition, if the channel correlation between the terminals is high, nulls cannot be formed at the same time. Thus, this paper proposes an overloaded MIMO-OFDM scheme with orthogonal codes that separates signals for different terminals without the CSI. The proposed scheme realizes orthogonality among the signals for the terminals while throughput reduction by spreading is compensated through with an overloaded MIMO technique. Numerical results obtained through computer simulation show that the proposed scheme achieves better bit error rate performance as compared to that of MU-MIMO on a Rayleigh fading channel when the number of users is two and each user has two receive antennas. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Overloaded MIMO / Code Division Multiple Access / Orthogonal Code / / / / / |
Reference Info. |
ITE Tech. Rep., vol. 41, no. 30, BCT2017-75, pp. 9-12, Sept. 2017. |
Paper # |
BCT2017-75 |
Date of Issue |
2017-09-01 (BCT) |
ISSN |
Print edition: ISSN 1342-6893 Online edition: ISSN 2424-1970 |
Download PDF |
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Conference Information |
Committee |
BCT IEEE-BT SHIKOKU |
Conference Date |
2017-09-08 - 2017-09-08 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Kochi City Culture-plaza |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Service Integration Broadcasting and Communication Systems, etc |
Paper Information |
Registration To |
BCT |
Conference Code |
2017-09-BCT-BT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Overloaded MIMO System with Orthogonal Codes |
Sub Title (in English) |
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Overloaded MIMO |
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Code Division Multiple Access |
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Orthogonal Code |
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1st Author's Name |
Kei Nakahara |
1st Author's Affiliation |
Keio University (Keio Univ.) |
2nd Author's Name |
Yukitoshi Sanada |
2nd Author's Affiliation |
Keio University (Keio Univ.) |
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Speaker |
Author-1 |
Date Time |
2017-09-08 13:55:00 |
Presentation Time |
25 minutes |
Registration for |
BCT |
Paper # |
BCT2017-75 |
Volume (vol) |
vol.41 |
Number (no) |
no.30 |
Page |
pp.9-12 |
#Pages |
4 |
Date of Issue |
2017-09-01 (BCT) |