Kenichi Kagoshima

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This paper describes feasibility of RSSI (Received Signal Strength Indicator) based access network detection for multi-band WLAN (Wireless LAN) using 2.4/5GHz and 60GHz aiming at power-saving of multi-band WLAN device and higher spectrum efficiency. The proposed scheme detects 60GHz coverage by using 2.4/5GHz WLAN signals without using 60GHz WLAN signals(More)
Decoupling and matching feeding networks are considerably interested in small wireless terminals to enhance their abilities for MIMO systems. In various proposals of DMFN's, the feeding networks composed of bridge susceptances and transmission lines are simple. However, this DMFN has only been applied to the limited array with special characteristics. This(More)
We discussed the radiation and reception properties of an array antenna with a decoupling and matching feeding network. When the feeding network is designed and constructed to satisfy the matching condition of the array antenna, each port pattern exhibits orthogonal property and eigen mode patterns when the orthonormal matrix, which constitue the sub matrix(More)
Decoupling and matching feeding networks are considerably interested for small wireless terminals to enhance their abilities in the application for MIMO systems. This paper describes various kinds of decoupling and matching feeding networks and derives the formulas for determining the network elements explicitly. Numerical results are presented to ensure(More)
This report aims to utilize existing and future Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing Wireless Local Area Network (MIMO-OFDM WLAN) systems characteristics-such as multiple subcarriers, multiple antennas and channel estimation characteristics-for indoor location estimation systems based on the Direction of Arrival (DOA)(More)
A new design formulas for a N×N matching network for an array antenna with mutual coupling is presented. Using matching conditions, decoupling between excitation ports and beam orthogonality have been explicitly verified. Numerical results of the antenna pattern in the vertical plane suggest that the received power of a two elements array is two(More)
This report aims to utilize existing and future Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing Wireless Local Area Network (MIMO-OFDM WLAN) systems characteristics—such as multiple subcarriers, multiple antennas, and channel estimation characteristics—for indoor location estimation systems based on the Direction of Arrival (DOA)(More)