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This paper describes a design and performance of a FM-CW (Frequency Modulated Continuous Wave) radar system using 24 GHz band. The principle for measuring the distance and the small displacement of target object is described, and the differential detection method for detecting the only target is proposed under the environments which multiple objects are located. In computer simulation, the basic performance...
In this paper, transmission performances for MU-MIMO (Multiuser Multiple Input Multiple Output) systems based on BD (Block Diagonalization) method in spatially correlated multipath fading environment are analyzed. The MU-MIMO system for evaluation is constructed as a transmitter having 4 antennas and 2 receivers having 2 antennas. By using the BD algorithm, system performances for the 4×2×2 MU-MIMO...
In this paper, a route control method for ad-hoc networks in a multipath fading environment is studied which is based on received power of repeater nodes and the history of established links. When repeater nodes received HELLO Message, these nodes obtain the received power information from Physical Layer in order to decide whether a link is stable or not. If the received power is lower than a threshold,...
This paper proposes a switching symbol timing detection method for continuous OFDM signals. The proposed method automatically switches two symbol timing detection schemes according to the received power level. In the high received power condition, the proposed method detects the symbol timing by the peak value of the correlation function between the received signal and its delayed signal. On the other...
This paper describes field evaluation results on a mobile WiMAX network and network services in Azumino city. An experimental mobile WiMAX network has been deployed in Azumino city so as to improve the sophistication of public services. Overview of the deployed network and field experimental results on both throughput in UDP (User Datagram Protocol) layer and received power are denoted in this paper...
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