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In this work new achievable rates are derived, for the uplink channel of acellular network with joint multicell processing, where unlike previousresults, the ideal backhaul network has finite capacity per-cell. Namely, thecell sites are linked to the central joint processor via lossless links withfinite capacity. The cellular network is abstracted by symmetric models, whichrender analytical treatment plausible. For this idealistic model family,achievable rates are presented for cell-sites that use compress-and-forwardschemes combined with local decoding, for both Gaussian and fading channels.The rates are given in closed form for the classical Wyner model and thesoft-handover model. These rates are then demonstrated to be rather close tothe optimal unlimited backhaul joint processing rates, already for modestbackhaul capacities, supporting the potential gain offered by the jointmulticell processing approach. Particular attention is also given to thelow-SNR characterization of these rates through which the effect of the limitedbackhaul network is explicitly revealed. In addition, the rate at which thebackhaul capacity should scale in order to maintain the original high-SNRcharacterization of an unlimited backhaul capacity system is found.

Uplink Macro Diversity of Limited Backhaul Cellular Network