نتایج جستجو برای: output composition channel

تعداد نتایج: 651778  

2005
Kerkil Choi Aaron D. Lanterman Majid Fozunbal

Given a channel with a known transition probability, we consider the problem of finding the input distribution that most closely achieves a desired output distribution. We pose the problem as a linear inverse problem subject to nonnegativity constraints, and employ an iterative algorithm for minimizing Csiszar’s I-divergence between the desired channel output and the channel output derived from...

Journal: :IEEE Transactions on Nuclear Science 1973

Journal: :CoRR 2016
Charalambos D. Charalambous Christos K. Kourtellaris

For any class of channel conditional distributions, with finite memory dependence on channel input RVs An 4 = {Ai : i= 0, . . . ,n} or channel output RVs Bn 4 = {Bi : i = 0, . . . ,n} or both, we characterize the subsets of channel input distributions PCI [0,n] ⊆P[0,n] 4 = { PAi|Ai−1,Bi−1 : i= 1, . . . ,n } , which satisfy conditional independence on past information, and maximize directed info...

Journal: :Quantum Information Processing 2007
Motohisa Fukuda

We simplify some conjectures in quantum information theory; the additivity of minimal output entropy, the multiplicativity of maximal output p-norm and the superadditivity of convex closure of output entropy. We construct a unital channel for a given channel so that they share the above additivity properties; we can reduce the conjectures for all channels to those for unital channels.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1390

با توجه به پیشرفت روز افزون سیستم های دیجیتال در همه زمینه های فناوری از جمله مخابرات مدرن و از طرف دیگر ماهیت آنالوگ سیگنالهای موجود در طبیعت نیاز بسیار وسیعی به مبدلهای آنالوگ به دیجیتال و دیجیتال به آنالوگ با مشخصات دینامیک و استاتیک مختلف وجود دارد. از آنجا که مبدلهای آنالوگ به دیجیتال مهمترین گلوگاه در مدارات دیجیتال با ورودی آنالوگ محسوب می شوند از این رو تلاشهای فراوانی برای افزایش سرعت ...

2008
Davide Rossini Vittorio Giovannetti

We analyze the quality of the quantum information transmission along a correlated quantum channel by studying the average fidelity between input and output states and the average output purity, giving bounds for the entropy of the channel. Noise correlations in the channel are modeled by the coupling of each channel use with an element of a one dimensional interacting quantum spin chain. Critic...

2012
Bobak Nazer

In prior work, we proposed the compute-andforward framework for sending linear combinations of messages to relays. In this note, we extend the notion of successive interference cancellation to the compute-and-forward setting. We find that once a relay has decoded a linear combination, it can mix it with its channel output to create a new effective channel output. The resulting effective channel...

2007
Krishnan Eswaran Anand Sarwate Anant Sahai Michael Gastpar Anand D. Sarwate

Recently, Shayevitz and Feder introduced an individual sequence formulation of channel coding and an elegant scheme that adapts Horstein’s scheme to this setting. Shayevitz and Feder’s scheme requires both full-rate passive channel output feedback as well as a lower-rate active feedback channel. We show how to eliminate the need for full-rate passive channel output feedback by using common rand...

2008
Grigori G. Amosov

We investigate the Weyl channels being covariant with respect to the maximum commutative group of unitary operators. This class includes the quantum depolarizing channel and the ”two-Pauli” channel as well. Then, we show that our estimation of the output entropy for a tensor product of the phase damping channel and the identity channel based upon the decreasing property of the relative entropy ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید