PRECODING MATRIX INDICATOR (PMI) INFORMATION TRANSMISSION METHOD AND DEVICE

摘要

Disclosed are a precoding matrix indicator (PMI) information transmission method and device, for realizing the feedback and receiving of PMIs. The PMI information feedback method provided in the present application server includes: UE determining the feedback of a PMI and a feedback mode used for feeding back the PMI; the UE determining a rank indicator (RI) and a precoding matrix in a compressed precoding matrix set and determining an RI and first PMI combined coding information value according to a preset RI and first PMI combined coding information value and a correlation list of RIs and codebook indices; and the UE employing the feedback mode to send the determined RI and first PMI combined coding information value to a base station.

主权项

1. A method of feeding back Precoding Matrix Indicator (PMI) information, comprising:
a User Equipment (UE) determining a need to feed back a PMI and a feedback mode for feeding back the PMI; the UE determining a Rank Indication (RI) and a precoding matrix in a set of compressed precoding matrixes and determining a jointly encoded information value of the RI and a first PMI according to a preset correspondence relationship between the jointly encoded information value of the RI and the first PMI, the RI and a codebook index; and the UE sending the determined jointly encoded information value of the RI and the first PMI to a base station in the feedback mode, wherein the preset correspondence relationship comprises: for RI=1, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 0 to 7, and the codebook index i1 and IRI/PMI1 satisfy i1=2 IRI/PMI1; for RI=2, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 8 to 15, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-8); for RI=3, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 16 to 17, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-16); for RI=4, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 18 to 19, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-18); for RI=5, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 20 to 21, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-20); for RI=6, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 22 to 23, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-22); for RI=7, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 24 to 25, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-24); and for RI=8, the jointly encoded information value IRI/PMI1 of the RI and the first PMI is 26, and the codebook index i1 is 0.