Patent ID: 9136920
Filing Date: 2015-09-15
Classification: H04B,H04L,H04W

Abstract:
1. A reception apparatus having a plurality of reception antennas used in a radio communication system capable of carrying out a Multiple Input Multiple Output (MIMO) communication, the reception apparatus comprising: a receiver for receiving, at each of the reception antennas, a radio signal of a plurality of data streams that is transmitted from each of a plurality of transmission antennas of a transmission device and includes reference signals whose transmission timings and transmission frequencies are different from one another; a first channel estimated value calculator for calculating a first channel estimated value of each of the data streams based on each of the reference signals and a known reference signal; a multiplier for calculating values associated with the reference signals of each of the data streams based on the first channel estimated value and a predetermined value; a signal synthesizer for synthesizing the values associated with the reference signals of each of the data streams; a weight calculator for calculating a reception weight to each of the data stream of each of the reception antennas based on a result of the synthesizing; a weight synthesizer for carrying out, by using the reception weight, antenna synthesis of the radio signal of each of the data streams; a second channel estimated value calculator for calculating a second channel estimated value of each of the data streams from the reference signal subjected to the synthesizing; and a demodulator for obtaining received data by carrying out MIMO demodulation by using the second channel estimated value of each of the data streams.