Download e-book for kindle: Network Information Theory by Abbas El Gamal, Young-Han Kim

By Abbas El Gamal, Young-Han Kim

This complete therapy of community info conception and its purposes presents the 1st unified insurance of either classical and up to date effects. With an strategy that balances the creation of recent versions and new coding recommendations, readers are guided via Shannon's point-to-point details idea, single-hop networks, multihop networks, and extensions to dispensed computing, secrecy, instant communique, and networking. ordinary mathematical instruments and strategies are used all through, requiring in basic terms uncomplicated wisdom of likelihood, while unified proofs of coding theorems are according to a couple of basic lemmas, making the textual content obtainable to rookies. Key issues coated comprise successive cancellation and superposition coding, MIMO instant conversation, community coding, and cooperative relaying. additionally coated are suggestions and interactive verbal exchange, capability approximations and scaling legislation, and asynchronous and random entry channels. This ebook is perfect to be used within the school room, for self-study, and as a reference for researchers and engineers in and academia.

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The proofs of the vector and conditional EPIs follow by the scalar EPI, the convexity of the function log(2???? + 2???? ) in (????, ????), and induction. Differential entropy rate of a stationary random process. Let X = {Xi } be a stationary continuous-valued random process. The differential entropy rate h(X) of the process X is defined as 1 h(X) = lim h(X n ) = lim h(Xn | X n−1 ). 3 MUTUAL INFORMATION Let (X, Y ) ∼ p(x, y) be a pair of discrete random variables. The information about X obtained from the observation Y is measured by the mutual information between X and Y defined as I(X; Y ) = ???? p(x, y) log (x, y)∈X ×Y p(x, y) p(x)p(y) = H(X) − H(X |Y ) = H(Y ) − H(Y | X) = H(X) + H(Y) − H(X, Y).

We then give a preview of the book with pointers to where the main results can be found. . Each node observes one or more sources and wishes to reconstruct other sources or to compute a function based on all the sources. To perform the required task, the nodes communicate with each other over the network. ∙ What is the limit on the amount of communication needed? ∙ How can this limit be achieved? . Elements of a networked system. The information sources (shaded circles) may be data, video, sensor measurements, or biochemical signals; the nodes (empty circles) may be computers, handsets, sensor nodes, or neurons; and the network may be a wired network, a wireless cellular or ad-hoc network, or a biological network.

The cardinality of the typical set is upper bounded as ????????T (n) (X)???????? ≤ 2n(H(X)+δ(є)) . ???????? є ???????? This can be shown by summing the lower bound in property  over the typical set. . If X1 , X2 , . . d. with Xi ∼ p X (xi ), then by the LLN, lim P????X n ∈ Tє(n) (X)???? = 1. n→∞ . The cardinality of the typical set is lower bounded as ????????T (n) (X)???????? ≥ (1 − є)2n(H(X)−δ(є)) ???????? є ???????? for n sufficiently large. This follows by property  and the upper bound in property . . . Properties of typical sequences.

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