Elements of information theory
Elements of information theory
Microwave Mobile Communications
Microwave Mobile Communications
A generalized space-time multiple-input multiple-output (MIMO) channel model
IEEE Transactions on Wireless Communications
IEEE Transactions on Information Theory
Uplink channel capacity of space-division-multiple-access schemes
IEEE Transactions on Information Theory
Information theory and communication networks: an unconsummated union
IEEE Transactions on Information Theory
Unitary space-time modulation for multiple-antenna communications in Rayleigh flat fading
IEEE Transactions on Information Theory
Capacity scaling in MIMO wireless systems under correlated fading
IEEE Transactions on Information Theory
Spectral efficiency in the wideband regime
IEEE Transactions on Information Theory
High-rate codes that are linear in space and time
IEEE Transactions on Information Theory
Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels
IEEE Transactions on Information Theory
Multiple-antenna capacity in the low-power regime
IEEE Transactions on Information Theory
Grassmannian beamforming for multiple-input multiple-output wireless systems
IEEE Transactions on Information Theory
Suboptimality of TDMA in the low-power regime
IEEE Transactions on Information Theory
Diversity-multiplexing tradeoff in multiple-access channels
IEEE Transactions on Information Theory
Variable-rate coding for slowly fading Gaussian multiple-access channels
IEEE Transactions on Information Theory
Antenna Packing in Low-Power Systems: Communication Limits and Array Design
IEEE Transactions on Information Theory
Capacity limits of MIMO channels
IEEE Journal on Selected Areas in Communications
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In this paper, we present an information theoretic study of a decentralized multiple access channel (MAC), where users are allowed to autonomously change their data rates, transmission powers, and channel codes, independently from other users in the system. We introduce a policy-based access mechanism, where each user is allocated a set of code-books, with various data rates and powers. Successful reception of all users is guaranteed, provided that each of the users adheres to its assigned access policy, when selecting its date rate and power. We completely characterize the capacity region for such policy-based access in the low power regime, for both single and multi-antenna (MIMO) systems, and we show that non-orthogonal policies outperform orthogonal ones. We also show that known MIMO capacity scaling laws, which apply in single user systems, carry over into framework of decentralized MAC.