Uplink Throughput Performance of Single-Carrier MIMO Spatial Multiplexing in Distributed Antenna Network

Multiple-input multiple-output (MIMO) spatial multiplexing achieves very high spectrum efficient signal transmissions in a cellular network (CN). However, this is only possible when the received signal-to-interference plus noise power ratio (SINR) is high enough. In a conventional CN, multiple antennas are colocated at each based station (BS) and hence, the throughput of a mobile terminal (MT) close to the cell edge significantly degrades due to reduced received SINR. Distributed antenna network (DAN), in which many antennas are spatially distributed over the cell, can solve this problem. In DAN, since some antennas can always be visible from an MT with a high probability, the received SINR can be increased over the entire cell. In this paper, we investigate the spatial distribution of the throughput of singlecarrier (SC) MIMO packet transmission using hybrid automatic repeat request (HARQ) and a near maximum likelihood signal detection in DAN. First, we evaluate, by computer simulation, the spatial distribution of the uplink throughputs in a single-cell environment and show that DAN can achieve higher throughput than CN over the entire cell. Furthermore, we discuss the impact of the frequency reuse factor on the uplink throughput in a multicell environment and show that DAN can reduce the frequency reuse factor and achieves higher spectrum efficiency than CN. Keywords-component; Distributed antenna, MIMO spatial multiplexing, single-carrier, near maximum likelihood detection