Precoding apparatus, program for precoding, and integrated circuit

摘要

More reduction of the amount of operation than in QRM-VP is realized while maintaining transmission performance that can be achieved by VP. A precoding apparatus 109 that performs preliminary processing on transmission data transmitted from a wireless transmission apparatus including a plurality of antennas to a wireless reception apparatus includes a linear filter generation section 301 that generates a linear filter on the basis of a result of estimation of a channel between an antenna unit 111 and the wireless reception apparatus, a signal conversion section 303 that expands perturbation term candidates of a perturbation vector to be added to a transmission data vector and a reference signal associated with the transmission data in a complex plane, and a perturbation vector search section 305 that searches for the perturbation vector to be added to the transmission data vector by performing a quadrant search on the basis of the perturbation term candidates and the reference signal expanded in the complex plane. A transmission signal vector is calculated by adding a found perturbation vector to the transmission data vector and multiplying the transmission data vector by the linear filter.

主权项

1. A precoding apparatus that performs a preliminary process on transmission data transmitted from a wireless transmission apparatus including a plurality of antennas to at least one wireless reception apparatus, the precoding apparatus comprising:
linear filter generation circuitry configured to generate a linear filter on the basis of channel information between each antenna and the wireless reception apparatus; signal conversion circuitry configured to expand perturbation term candidates of a perturbation vector to be added to a transmission data vector and a reference signal associated with the transmission data in a complex plane; and perturbation vector search circuitry configured to search for the perturbation vector to be added to the transmission data vector on the basis of the perturbation term candidates and the reference signal expanded in the complex plane, wherein a transmission signal vector is calculated by adding a found perturbation vector to the transmission data vector and multiplying the transmission data vector by the linear filter.