Michal Yemini

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In this paper we consider the simultaneous percolation of two Gilbert disk models. The two models are connected through excluding disks, which prevent elements of the second model to be in the vicinity of the first model. Under these assumptions we characterize the region of densities in which the two models both have a unique infinite connected component.(More)
In this paper, we introduce the two-user asynchronous cognitive multiple access channel (ACMAC). This channel model includes two transmitters, an uninformed one and an informed one, which knows prior to the beginning of a transmission the message which the uninformed transmitter is about to send. We assume that the channel from the uninformed transmitter to(More)
A state dependent channel with asynchronous side information at the transmitter is introduced. It is assumed that the state information sequence is a possibly delayed version of the state sequence. The encoder and the decoder are aware of the fact that the state information might be delayed, and an upper bound on the delay is also known, but other than(More)
We introduce the asynchronous cognitive multiple-access channel with an uninformed encoder and an informed one. We assume that the informed encoder knows in advance the message of the uninformed encoder and consequently its codeword, up to some delay. In addition, the informed encoder knows the set of all possible delays in the channel. We characterize the(More)
Several channels with asynchronous side information are introduced. We first consider single-user state-dependent channels with asynchronous side information at the transmitter. It is assumed that the state information sequence is a possibly delayed version of the state sequence, and that the encoder and the decoder are aware of the fact that the state(More)
We describe a low-complexity method for time-domain compensation of phase noise in OFDM systems. We extend existing methods in several respects. First, we suggest using the Karhunen–Loève representation of the phase noise process to estimate the phase noise. We then derive an improved data-directed choice of basis elements for LS phase noise(More)
In this paper, we investigate the global energy efficiency of a bidirectional amplify-and-forward relay MIMO system. It is assumed that the relay serves two end-users, each requiring a minimum target rate. Two algorithms are proposed, a suboptimal one with lower complexity, and an optimal one with slightly higher complexity. We present numerical results(More)
In this paper we analyze the connectivity of cognitive radio ad-hoc networks. Contrary to previous works, we pursue the connectivity of both the primary and secondary networks, a state we call “simultaneous connectivity”. We determine that if the networks are simultaneously connected then their infinite connected components are unique. In(More)
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