News Column

Findings from Y. Oshima and Co-Researchers Advance Knowledge in Telecommunications

March 5, 2014



By a News Reporter-Staff News Editor at Telecommunications Weekly -- Investigators publish new report on Telecommunications. According to news reporting out of Kanagawa, Japan, by VerticalNews editors, research stated, "This paper proposes a novel method for adaptively controlling the admission of interference to users in our previously proposed layered partially non-orthogonal block diagonalization (BD) precoding method for downlink multiuser multiple-input multiple-output (MIMO) transmission that employs cooperation among multiple base stations (BSs). The proposed method is applicable when some of the instantaneous channel state information (CSI) feedback between the user equipment and the respective BSs is missing if the path loss between the user equipment and BS is higher than a predetermined threshold."

Our news journalists obtained a quote from the research, "The proposed method suppresses the loss in the transmitter diversity (beam forming) gain caused by the perfect nulling of inter-user interference in BD. By allowing the inter-user interference from a link that has a high average path loss, the overall throughput performance of simple BD is enhanced."

According to the news editors, the research concluded: "We show that the combination of layered transmission that restricts the set of BSs used for the signal transmission and adaptive control of interference admission significantly increases the throughput of BS cooperative multiuser MIMO with partial CSI feedback."

For more information on this research see: A Novel Adaptive Interference Admission Control Method for Layered Partially Non-orthogonal Block Diagonalization for Base Station Cooperative MIMO. IEICE Transactions on Communications, 2014;E97B(1):155-163. IEICE Transactions on Communications can be contacted at: Ieice-Inst Electronics Information Communications Eng, Kikai-Shinko-Kaikan Bldg, 3-5-8, Shiba-Koen, Minato-Ku, Tokyo, 105-0011, Japan.

Our news journalists report that additional information may be obtained by contacting Y. Oshima, NTT DOCOMO INC, Yokosuka, Kanagawa 2398536, Japan. Additional authors for this research include A. Benjebbour and K. Higuchi.

Keywords for this news article include: Asia, Japan, Kanagawa, Telecommunications

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Source: Telecommunications Weekly


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