Receiver cooperative MIMO-OFDM with higher-frequency radio forwarding

Let us consider that space division multiplexing (SDM) signal is transmitted at a base station (BS) with a number of antennas to a mobile terminal (MT) with fewer antennas. It will be intractable for the MT to demultiplex the received SDM signal by spatial linear filtering in the case of less degrees of freedom at the MT. Receiver cooperative multiple-input and multiple output (RC-MIMO) is applied to demultiplex the received SDM signal frame with the enhancement of degrees of freedom at the MT by sharing the other SDM signal frames received at the surrounding MTs with higher-frequency radio forwarding called radio over higher-frequency radio (RoHR). In this paper, we show the performances of pulse-code-modulated RoHR (PCM-RoHR) and pulse-amplitude-modulated RoHR (PAM-RoHR) for a two-antenna BS and several single-antenna cooperative MTs with computer simulations.