Network Coding and Wireless Physical-layer ... - Jacobs University

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LIST OF FIGURES
5.11 Comparison of normalized cumulative histograms of the number of LTencoded
symbols needed to be transmitted in a coded butterfly network
with varying erasure probability at BD such that all original symbols are
recovered in two cases, without using the proposed algorithm and with
Algorithms 5.1 and 5.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
6.1 A secret-key cryptosystem . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
6.2 A secret-key cryptosystem based on mutual CSI . . . . . . . . . . . . . . . 80
6.3 A generic communication system model . . . . . . . . . . . . . . . . . . . . 80
6.4 A simulation result showing the mutual information between the channel
estimates of Alice and Bob, and between their channel envelope estimates . 82
6.5 A communication system model with one relay . . . . . . . . . . . . . . . . 83
6.6 A simulation result showing the mutual information between the channel
estimates of Alice and Bob in two cases, direct communication and communication
with one relay . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.7 A fork-rake network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.8 A two-relay fork-rake network with two enemies . . . . . . . . . . . . . . . 86
6.9 A butterfly network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
6.10 The proposed pilot packet format for the RSF Protocol . . . . . . . . . . . 90
7.1 A modified secret-key cryptosystem based on mutual CSI with physical-key
encoding and decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
7.2 The model of an enemy cryptanalyst (a), and its equivalent (b) . . . . . . 100
7.3 An illustration of combinatorial weak security limit . . . . . . . . . . . . . 104
7.4 Secure network coding in a butterfly network with (a) Shannon security
and (b) weak security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
8.1 Interrelationships among mentioned subjects . . . . . . . . . . . . . . . . . 112
8.2 One-relay WPSG schemes, each arrow representing a transmitted signal:
(a) amplify and forward, (b) MA-AF, (c) our proposed scheme . . . . . . . 113