Yuanpeng Liu

Learn More
With the severe spectrum shortage in conventional cellular bands, millimeter wave (mmW) frequencies between 30 and 300 GHz have been attracting growing attention as a possible candidate for next-generation microand picocellular wireless networks. The mmW bands offer orders of magnitude greater spectrum than current cellular allocations and enable very(More)
With the severe spectrum shortage in conventional cellular bands, millimeter wave (mmW) frequencies between 30 and 300 GHz have been attracting growing attention as a possible candidate for next-generation microand picocellular wireless networks. The mmW bands offer orders of magnitude greater spectrum than current cellular allocations and enable very(More)
In a distributed wireless network, it is possible to employ several relays and mimic a multiple antenna transmission system. In this paper we propose a MAC layer solution that allows multiple relays to send information to the receiver at unison, using a randomized distributed space time code. The randomized space-time coding can recruit relays on the fly,(More)
A K-user cascade Gaussian Z-interference channel is a subclass of the general K-user Gaussian interference channel, where each user, except the first one, experiences interference only from the previous user. Under simple Han-Kobayashi schemes assuming Gaussian inputs and no time sharing, it is shown that the maximum sum rate is achieved by each user(More)
In a multi-access channel, completion time refers to the number of channel uses required for users, each with some given fixed bit pool, to complete the transmission of all their data bits. In this paper, the characterization of the completion time region is based on the concept of constrained rates, where users' rates are defined over possibly different(More)
In a multi-user channel, completion time refers to the number of channel uses required for users, each with some given fixed bit pool, to complete the transmission of all their data bits. This paper extends the information theoretic formulation of multi-access completion time to broadcast channel and interference channel, enabling us to obtain the so-called(More)
In order to analyze the procedure of hot rolling sheet strip, the model of expansion of coiler was simulated during sheet strip coiling with FEM. The base of conditions of hot rolling sheet strip coiling regulations, and studying the rules of displacement change law of sheet stripes nodes along coiler innermost layer during coiler expansion with different(More)
In this paper we focus on the studies of graphene wrinkling, from its formation to collapse, and its dependence on aspect ratio and temperature using molecule dynamics simulation. Based on our results, the first wrinkle is not formed on the edge but in the interior of graphene. The fluctuations of edge slack warps drive the wrinkling evolution in graphene(More)
We study a class of discrete memoryless broadcast interference channels (DM-BICs), where one of the broadcast receivers is subject to the interference from a point-to-point transmission. A general achievable rate region R based on rate splitting, superposition coding and binning at the broadcast transmitter and rate splitting at the interfering transmitter(More)
The shape of leading/trailing edge is very important to the performance of the turbine blade. Generally, the leading/trailing edge is a small section of the elliptic arc. In order to model the blade accurately, we propose here a new idea of handling the difficult situation where the noised data span a small section of the elliptic arc. This new fitting(More)