Patent ID: 7161534

Claim:
A hybrid beamforming apparatus for a communication system, comprising a plurality of antennas receiving a wireless signal to generate a plurality of time domain signals; a plurality of converters connected to the antennas and converting the plurality of time domain signals into a plurality of frequency domain signals; a plurality of hybrid weight-coefficient generators connected to the antennas and the converters, receiving the plurality of time domain signals, the plurality of frequency domain signals and a training signal, and generating a plurality of hybrid weight coefficients, the hybrid weight coefficients being calculated according to the formula w opt ⁡ ( k ) = 1 N ⁢ R yy - 1 ⁢ r Y ⁢ ⁢ D ⁡ ( k ) , where R yy is a time-domain correlation matrix and r YD (k) is a cross-correlation vector for a subcarrier k; and a plurality of adders for summing products formed by multiplying the plurality of frequency domain signals and the plurality of hybrid weight coefficients in pairs so as to generate an output signal for each of a plurality of subcarriers.