Communicating a feedback data structure containing information identifying coding to be applied on wirelessly communicated signaling

摘要

To perform wireless communications in a closed loop multiple input, multiple output (MIMO) system, a feedback data structure is communicated over a wireless channel between a first wireless node and a second wireless node, where the feedback data structure contains indicators identifying coding to be applied by the second wireless node on signaling communicated between the second wireless node and the first wireless node, where the information in the feedback data structure is based on wireless channel conditions detected at the first wireless node. The indicators identify different codings to be used for different corresponding bands in the wireless channel.

主权项

1. A method for operating a first wireless node as part of a closed loop multiple-input multiple-output (MIMO) communication system including the first wireless node and a second wireless node, the method comprising:
determining feedback data, wherein determining feedback data includes selecting an entry in a predefined codebook, wherein rows of the codebook correspond respectively to two or more values of PMI, wherein columns of the codebook correspond respectively to two or more rank values; transmitting feedback data over a wireless channel from the first wireless node to the second wireless node, wherein the feedback data includes at least a first of the PMI values, wherein the first PMI value corresponds to the row of the selected codebook entry, wherein said transmitting is performed by a wireless interface, wherein the feedback data also includes information identifying preferred subbands in the wireless channel, wherein the first PMI value is a single value for the preferred subbands.