For noncoherent communication over fading channels, pilot-aided transmission is a practical scheme which allows the receiver to compute channel estimates for subsequent use in coherent decoding. We propose an improved scheme whereby the transmitter interleaves several pilot substreams with independently-coded data substreams to facilitate successive decoding and channel re-estimation at the rec...

In this paper, we study a general additive state-dependent Gaussian interference channel (ASD-GIC) where we consider two-user interference channel with two independent states known non-causally at both transmitters, but unknown to either of the receivers. An special case, where the additive states over the two links are the same is studied in [1], [2], in which it is shown that the gap between ...

We consider the Shannon cipher system with a variable key rate, and study the necessary and sufficient conditions for perfect secrecy in the sense that the exponential rate of the probability of breaking into the system would not be improved by observing the cryptogram. For a memoryless plaintext source, we derive achievable lower bounds on the number of key bits needed for almost every plainte...

Global on-chip communication is rapidly becoming a speed and power bottleneck in CMOS circuits. In this paper, a ‘mixed-signal’ approach is taken to analyze on-chip interconnects and it is investigated how data-rates can be improved. It is shown that complex signaling schemes such as OFDM and CDMA are not efficient to improve the data-rate, while equalization can significantly improve the achie...

A simply described achievable rate region is obtained for the genie-aided cognitive radio channel using the Han-Kobayashi celebrated jointly decoding strategy for the interference channel and the Gel’fandPinsker coding scheme for channels with side information known at the transmitter, and then is simplified by Fourier-Motzkin elimination. The obtained achievable rate region (i) extends the Cho...

In this paper, we investigate achievable rates on the multiple access channel with feedback and correlated sources (MACFCS). The motivation for studying the MACFCS stems from the fact that in a sensor network, sensors collect and transmit correlated data to a common sink. We derive two achievable rate regions for the three-node MACFCS.

This tutorial paper deals with the problem of characterizing the maximal achievable rate R∗(n, ) at a given blocklength n and error probability over block-fading channels. We review recent results that establish tight bounds on R∗(n, ) and characterize its asymptotic behavior. Comparison between the theoretical results and the data rates achievable with the coding scheme used in LTE-Advanced ar...

We consider a Shannon cipher system for memoryless sources, in which distortion is allowed at the legitimate decoder. The source is compressed using a rate distortion code secured by a shared key, which satisfies a constraint on the compression rate, as well as a constraint on the exponential rate of the excess-distortion probability at the legitimate decoder. Secrecy is measured by the exponen...