ABSTRACT
This chapter presents a survey of information theoretic results available on DAS in cellular systems. The treatment focuses on the derivation of the per-cell ergodic sumrate of different intercell and intracell communications strategies for both uplink and downlink. Only a simple symmetric family of cellular models in which the intercell interferences are emerging from the adjacent cells is considered. Although hardly realistic, this family of models accounts for essential parameters of cellular systems such as intercell interference and fading. Whenever computation of the sum-rate is intractable or yields little insight into the problem, asymptotic performance criteria (e.g., extreme-SNR parameters) are evaluated. Emphasis is placed on the assessment of benefits of cooperation among access points (AP) (i.e., joint detection/precoding). Mathematical tools underlying the results are introduced briefly where necessary. Finally, some advanced topics, such as cooperation among mobile terminals, are discussed as well.
