Evaluation of throughput and coverage employing multipath interference canceller in high-speed downlink packet access in multipath fading channel

Abstract

This paper presents the throughput performance based on system-level simulations employing essential techniques, e.g.. the adaptive modulation and channel coding (AMC) scheme and the fast scheduling algorithm, in high-speed downlink packet access called HSDPA in a multipath fading channel. The computer simulation results elucidate that the multipath interference canceller (MPIC), which we previously proposed, exhibits a sufficient multipath interference (MPI) suppression effect especially for the use of multi-level modulation such as 16QAM and 64QAM, resulting in increased overall throughput. We also show that the average throughput above 10 Mbps and 5 Mbps are possible for approximately 15 and 50% of users employing, a matched filter (MF)-based RAKE receiver within a cell in a one-path channel, respectively Furthermore, we clarify that although, in a two-path filling channel, the probability of users using the MF-based RAKE receiver who can satisfy the average throughput above 5 Mbps is reduced to approximately 15% within a cell, it can be increased to approximately 30% by employing MPIC thanks to its effective MPI suppression.