The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A finite-state Markov channel model is proposed in this paper to model the aeronautical channel. A class of aeronautical channel models is introduced, featuring parking and taxi environments, takeoff and landing situations, and en-route scenarios for ground-air and air-air links. Rayleigh and Ricean fading are fitted to these scenarios. The parameters of the model are obtained from theoretical analysis...
With the development of wireless communication system, long-range precise channel prediction is considered to be more important. Traditional predictors require a lot of pilots and their performances degrade very fast after the correlation time, especially in high speed mobile environment. A new parametric channel predictor, CPREI, which is based on the auxiliary environment information, is presented...
This paper presents a radio propagation measurement system for wideband multiple-input-multiple-output (MIMO) measurements at 3.52 GHz. MIMO channel matrix of size 7times7 can be measured using fast microwave switches at the transmitter (TX) and the receiver (RX).The system is capable of measuring the direction of departure (DOD) and direction of arrival (DOA) in the vertical polarization in both...
To solve the problem of channel prediction capability which is limited by channel coherent time, this paper investigates the relationship between the radio propagation environment and the channel state information (CSI). A new parametric predictor assisted by the knowledge of radio propagation environment information is introduced. If the parameters of propagation environment have been known in advance,...
Tracking dynamics on the GPS signal is still a big challenge to the receiver designer as the operating conditions are becoming more volatile. Usually, the phase-locked loop (PLL) is used in GPS receivers to track an incoming signal and to provide accurate carrier phase measurements. However, in high dynamic situations, the conflict between improving PLL tracking performance and the ability to track...
To obtain channel characteristic and provide references for China B3G system design, we design a simple channel sounder of 2Tx and 2Rx MIMO system. Engineering parameters of the sounder have been analyzed in this paper. The example of the measurement campaigns performed in indoor by the sounder is given.
Measurements of Urban microcell channels with 20MHz bandwidth at 5.8GHz frequency have been performed in indoor and outdoor environments. By analyzing the measurement data, the general channel characteristics have been extracted. At the same time, we design a simple 2×2 MIMO channel sounder, with which the spatial-time channel model has been extracted. Compared with SCM (Spatial Channel Model), it...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.