Patent ID: 7555050

Claim:
A space-time block coding (STBC) transceiving system combined with beamformer based on local polynomial approximation (LPA), comprising: an STBC encoder having branches in number of D to generate output signals in number of D for a single input signal; a beamformer having output antennas in number of D*B, which includes beam-forming subarrays in number of D each having the output antennas in number of B to form downlink beams from signals in number of D outputted from the STBC encoder; and an STBC decoder restoring an original signal by dividing a single signal, which is transmitted from the D-numbered beam-forming subarrays to a single mobile antenna, into signals in number of D in consideration of channel characteristics, wherein the beamformer comprises: a direction of arrival (DOA) and velocity estimator evaluating variables of DOA and velocity in a steering vector that has the minimum sum value of squares of differences between original signals transmitted to a base station from a mobile user, and estimated user signals combined with steering vectors variable by DOAs and mobile user velocities, for each sample within a modified window period regarding infinitely continuous mobile-user signals as definitely discrete samples in a period, and generating a downlink beam from the evaluated value of the DOA and velocity; and a steering-vector operation unit conducting a steering-vector operation by using signal wavelengths and DOAs to adjust delay components by distances (d) between the antennas with reference to positions of a first antenna to the B-numbered antennas.