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In this paper, a routing method for Wi-Fi mesh networks considering traffic load balancing and quality of service (QoS) is proposed. A mesh network is constructed with several static access points, and each access point connects each together with Wi-Fi technology. Wireless mesh links between access points are established by using proposed routing method which is based on the optimized link state...
In this paper, SC-FDMA and OFDM systems with fast tracking equalizer based on RLS algorithm in multipath fading environments are proposed. In the proposed SC-FDMA and OFDM system with fast tracking equalizer, known-reference signals are allocated to the 1st slot of transmitting slots on each subcarrier at the transmitter. The transmitted signals are equalized with the reference signals on the frequency...
In this paper, transmission performance for downlink MU-MIMO (Multiuser Multiple-Input Multiple-Output) systems with computer simulation and field experiment are described. The downlink MU-MIMO system is constructed as a transmitter with 6 antennas and receivers with 2 antennas, and the maximum number of users(receivers) is 3. In computer simulation, MU-MIMO transmission system can be realized by...
In this paper, transmission performance for downlink MU-MIMO (Multiuser Multiple-Input Multiple-Output) systems with computer simulation and field experiment are described. The downlink MU-MIMO system is constructed as a transmitter with 6 antennas and receivers with 2 antennas, and the maximum number of users(receivers) is 3. In computer simulation, MU-MIMO transmission system can be realized by...
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...
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...
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