Method and apparatus for equal energy codebooks for antenna arrays with mutual coupling

摘要

A method and apparatus provide equal energy codebooks for antenna arrays with mutual coupling. A plurality of precoders can be received from a codebook in a transmitter having an antenna array. Each precoder of the plurality of precoders can be transformed using a transformation that maps each precoder to equal radiated power to generate transformed precoders. A signal can be received for transmission. A transformed precoder of the plurality of transformed precoders can be applied to the signal to generate a precoded signal for transmission over a physical channel. The precoded signal can be transmitted.

主权项

1. A method comprising:
receiving a plurality of precoders from a codebook in a transmitter having an antenna array; transforming each precoder of the plurality of precoders using a transformation that maps each precoder to a transformed precoder such that the transformed precoders generate antenna patterns with equal radiated power; receiving a signal for transmission; applying a transformed precoder of the plurality of transformed precoders to the signal to generate a precoded signal for transmission over a physical channel; and transmitting the precoded signal, wherein a transformation matrix for the transformation is an inverse of a right factor of a factorization of a Hermitian and non-negative definite matrix.