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Delay spread characteristics in the 28GHz band were measured at line of sight urban environments using narrow beamwidth antennas and simulated using ray-tracing with the same conditions. The channel sounder has 500MHz wide bandwidth at 28GHz, and using swept time delayed cross-correlation technique. The measurement environment is urban low-rise areas. The measurement and simulation results are compared...
Wideband characteristics in the 28GHz band were measured at various environments using narrow beamwidth antennas. In this paper, we present delay spreads of urban low-rise area with two line of sight cases, one is a face-to-face and the other is non-face-to-face between antennas. Also, we present a distance characteristic of delay spread based on measured data.
In this paper, we investigate the 28 GHz path loss characteristics in urban environments. We present a wideband channel sounder used to measure spatial and temporal channel characteristics in the 28 GHz frequency band. Channel measurement campaigns are carried out in typical urban low-rise and very high-rise environments in Korea. Based on measured data, we present results of path loss exponents and...
Millimeter-wave has been used for high transmission rate fixed communication in line of sight and short range without problems due to multipath reflections. But if it is used for mobile communications, such as WLAN using at 60GHz and 5G using at 28GHz, the delay spread made of multipath reflections limits the transmission rate. The delay spread characteristics were measured in an empty office room...
Millimeter-wave band has been using for high-speed line of sight transmission in short range and there is no problem due to delay spread. But if it is used in indoor to connect an access point(AP) to terminals of WLAN, the delay spread made by multipath reflections limits the transmission speed. Typically, antenna beamwidth is the wider, delay spread is the bigger and it is also equally applicable...
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