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.
Gaussian approximation (GA) is widely used to construct polar codes. However, when the code length is long, the subchannel selection inaccuracy due to the calculation error of conventional approximate GA (AGA), which uses a two-segment approximation function, results in a catastrophic performance loss. In this paper, new principles to design the GA approximation functions for polar codes are proposed...
Polar codes have a regular recursive structure which is feasible for hardware implementation in practice. Quantization is a critical issue in hardware implementation. In this paper, a quantization scheme for successive-cancellation (SC) decoding of polar codes is proposed based on the equivalent channel cutoff rate optimization. Moreover, a modified Gaussian approximation (GA) method exploiting the...
This letter studies generalized resource allocation in multiple description coding multicast (MDCM) orthogonal frequency division multiplexing (OFDM) systems, where many multicast groups are served simultaneously by base station (BS). Due to non-tractable nature, the problem is reformulated to weighted-capacity maximization by resource distribution among virtual multicast groups (VMGs). Then, the...
End-to-end performance of multihop wireless communication systems with non-regenerative channel state information (CSI)-assisted relays operating over independent not necessarily identically Weibull fading channels is presented. With the aid of the inequality between harmonic and geometric means, the end-to-end signal-to-noise ratio (SNR) is bounded. By considering the product of rational powers of...
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.