[Invited Paper] Digital RoHR with Lloyd-Max Quantization for Distributed Collaborative MIMO-OFDM Reception

抄録

We consider applying Lloyd-Max quantization to a distributed collaborative interference canceller (DCIC) with digital higher-frequency radio (HR) forwarding in order to effectively use the HR-band resources. A destination terminal (DT) achieves higher throughput and earns higher diversity order by gathering the other received signals forwarded from surrounding relay stations (RSs) with HR band even if it mounts fewer receive antennas than the transmit antennas at the base station (BS). However enormous HR-band resources are required to forward the received signals which are digitally encoded at the surrounding RSs with sufficiently low latency. We need to develop techniques to effectively use the HR-band resources. The simulation results show that Lloyd-Max quantization achieves higher data reliability as compared to the uniform quantization for MIMO-OFDM signal with high peak-to-average power ratio (PAPR). Also increasing transmit antennas with the same spatial diversity order is less sensitive to the required number of quantization bits.