Author :
Lapidoth, Amos ; Levy, Noga ; Shamai Shitz, Shlomo ; Wigger, Michele
Author_Institution :
Dept. of Inf. Technol. & Electr. Eng., ETH Zurich, Zurich, Switzerland
Abstract :
We study an interference network where equally numbered transmitters and receivers lie on two parallel lines, with each transmitter opposite its intended receiver. We consider two short-range interference models: the asymmetric network, where the signal sent by each transmitter is interfered only by the signal sent by its left neighbor (if present), and a symmetric network, where it is interfered by both its left and its right neighbors. Each transmitter is cognizant of its own message, the messages of the tℓ transmitters to its left, and the messages of the tr transmitters to its right. Each receiver decodes its message based on the signals received at its own antenna, at the rr receive antennas to its left, and at the rr receive antennas to its right. For such networks, we provide upper and lower bounds on the multiplexing gain, i.e., on the high signal-to-noise ratio asymptotic logarithmic growth of the sum-rate capacity. In some cases, our bounds coincide, e.g., for the asymmetric network. Our results exhibit an equivalence between the transmitter sideinformation parameters tℓ, tr and the receiver side-information parameters rℓ, rr in the sense that increasing/decreasing tℓ or tr by a positive integer δ has the same effect on the multiplexing gain as increasing/decreasing rℓ or rr by δ. Moreover-even in asymmetric networks-there is an equivalence between the left side-information parameters (tℓ, rℓ) and the right sideinformation parameters (tr, rr).
Keywords :
cellular radio; decoding; multiplexing; radio receivers; radio transmitters; radiofrequency interference; receiving antennas; asymmetric network; cellular mobile communication system; clustered decoding; cognitive Wyner networks; dirty-paper coding; interference network; left side-information parameters; multiplexing gain; parallel lines; receive antennas; receiver side-information parameters; right side-information parameters; short-range interference models; signal-to-noise ratio asymptotic logarithmic growth; sum-rate capacity; symmetric network; transmitter sideinformation parameters; Decoding; Interference; Mobile communication; Multiplexing; Receiving antennas; Transmitters; Clustered decoding; dirty-paper coding; interference networks; message cognition; multiplexing gain; successive interference cancellation;