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.
The accuracy of the estimation of time-delay and channel coefficients in Orthogonal frequency division multiplexing (OFDM) communication systems can be improved by reducing the variability of channel coefficients, i.e. reducing channel covariance and increasing channel mean for a given power. First, we prove that the effect of channel variability between different OFDM symbols cannot be directly captured...
A key aspect to design an OFDM system for combined positioning and high-data-rate communications is to find optimal data and pilot power allocations. Previous work has investigated the capacity maximizing design taking into account the effects of channel and time-delay estimation for finite number of subcarriers and channel taps. In this paper, we propose a method based on the asymptotic expected...
A key aspect to design an OFDM system for combined positioning and high-data-rate communications is to find optimal data and pilot power allocations. Previously, A capacity maximizing design by taking into account the effects of channel and time-delay estimation for finite number of subcarriers and channel taps has been investigated. Increasing the number of subcarriers and channel taps make the matrix...
The design of pilot and data power allocations for multicarrier OFDM signals is a key aspect in the development of combined positioning and high-data-rate communications systems. Previous work has investigated the capacity-maximizing pilot and data power allocation when only taking into account the effect of channel estimation accuracy on capacity. Results have shown that distributions with equi-spaced...
The design of pilot and data power allocations for multicarrier OFDM signals is a key aspect in the development of combined positioning and high-data-rate communications systems. In this paper, we investigate capacity-maximizing pilot and data power allocations when a certain positioning accuracy is required. We consider a formulation based on the Expected Crámer-Rao Bound of the joint time-delay...
The use of multicarrier signals for combined positioning and high data rate communications systems requires accurate estimation of timing offset and channel impulse response in order to achieve desirable performance. Previous work has investigated optimal pilot structures for joint timing offset and channel impulse response estimation, and the capacity maximizing pilot and data power allocation when...
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.