... multiple access scheme for S-UMTS/IMT-2000.5.2 Link Budget Analysis5.2.1 PurposeA link budget analysis forms the cornerstone of the system design. Link budgets areperformed in order to analyse ... switching is that the uplink and downlink modula-tion and access schemes can be optimised for the particular transmission environment.Furthermore, since the uplink and downlink noise levels are ... thisinstance, uplink and downlink bit error rates, not noise levels, are added together whendetermining the overall performance of the link. In this instance, the overall performanceof the link is...