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2 Outline  Abstract  Introduction  Heterogeneous network topology utilizing a mix of high-power(macro) and low-power base stations  LTE heterogeneous network nodes and their interfaces  Interference  LTE DL physical layer structure for FDD  Conclusions Abstract  As the spectral efficiency of a point-to-point link in cellular networks approaches its(More)
—In this paper we assess how coordination among base stations can be exploited to improve downlink capacity in fourth generation (4G) cellular networks. We focus on heterogeneous networks where low-power pico cells are deployed within the coverage area of an existing macro network with the aim of offloading traffic from the (potentially congested) macro(More)
— In this paper modified ARQ (automatic-repeat-request) techniques based on turbo coding are investigated for asynchronous DS-CDMA (direct-sequence code-division multiple-access) data networks under shadowing and frequency selective fading channel conditions. The throughput, delay, and energy efficiency performance of standard ARQ, metric combining , and(More)