ISSN : 1796-2056
Volume : 3    Issue : 7    Date : July 2008

Analysing a Multi-hop UMTS over Multiple Frequency Schemes and an Urban Environment
Konstantios Konstantinou, Muhammad A. Imran, and Costas Tzaras
Page(s): 41-48
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In this paper we analyse the performance of a relay based UMTS system in an urban environment
using multiple hops on multiple frequency bands. Measurement based path loss, fading and
shadowing models are used in the Manhattan grid deployment scenario. Both uplink and downlink
operations of the cellular system are considered at the same time. Two hop communication links
over the uplink and downlink are operated at four non-overlapping spectrum bands in order to
minimise interference. This results in several possible frequency schemes. Power solutions are
derived analytically for the selected frequency schemes. The system performance is evaluated both
by simulation and analysis and improvement by employing relays is shown.

Index Terms
UMTS, Cellular, Relay, Manhattan Grid.