RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM

PROBLEM TO BE SOLVED: To improve a codebook-based MU-MIMO transmission characteristic.SOLUTION: A base station device 200 transmits to a plurality of terminal devices 100 a known reference signal sequence (L1). Each terminal device 100 estimates a propagation path on the basis of the received reference signal sequence (L2), and extracts a desired code (linear filter) from a codebook shared with the base station device 200 on the basis of the estimated propagation path information, to notify the base station device 200 (L3). The base station device 200 generates in advance transmission data destined to each terminal device (L4), and on the basis of the code fed back from each terminal device 100, precodes the transmission data destined to each terminal device (L5), and transmits data (L6). Each terminal device 100 detects a desired signal from reception signals including signals destined to other terminal devices received in a multiplexed manner (L7).