A software radio architecture for linear multiuser detection

摘要

The integration of multimedia services over wireless channelsncalls for provision of variable quality of service (QoS) requirements.nWhile radio resource management algorithms (such as power control andncall admission control) can provide certain levels of variability innQoS, an alternate approach is to use reconfigurable radio architecturesnto provide diverse QoS guarantees. We outline a novel reconfigurablenarchitecture for linear multiuser detection, thereby providing a widenrange of bit error rate (BER) requirements amongst the constituentnreceivers of the reconfigurable architecture. Specifically, we focus onnachieving this dynamic reconfiguration via a software radionimplementation of linear multiuser receivers. Using a unified frameworknfor achieving this reconfiguration, we partition functionality into twoncore technologies [field programmable gate arrays (FPGA) and digitalnsignal processor (DSP) devices] based on processing speed requirements.nWe present experimental results on the performance and reconfigurabilitynof the software radio architecture as well as the impact of fixed pointnarithmetic (due to hardware constraints)