CODEBOOK AND CODEBOOK SEARCH

摘要

Briefly, in accordance with one or more embodiments, a codebook used to provide a precoding matrix indicator and/or channel state information comprises one or more rank-1 codewords and at least one or more rank-2 codewords exhibiting a nesting property with the rank-1 codewords, and one or more rank-2 codewords not exhibiting a nesting property with the rank-1 codewords. Further, the rank-1 codewords may include at least some Discrete Fourier Transform (DFT) vectors, and at least some vectors that are optimized for a cross polarize array of antennas if the array of antennas is cross polarized. The codebook may be utilized for single-user multiple-input, multiple-output (SU-MIMO) or multi-user multiple-input, multiple-output (MU-MIMO).

主权项

1. A user equipment (UE), comprising:
a wireless transceiver having an array of one or more antennas; and a processor coupled to the wireless transceiver and a memory coupled to the processor, the memory having a codebook stored therein, wherein the codebook comprises: one or more rank-1 codewords; at least one or more rank-2 codewords exhibiting a nesting property with the rank-1 codewords; and one or more rank-2 codewords not exhibiting a nesting property with the rank-1 codewords.