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AssigneeApple Inc.
InventorsWen Tong, Hosein Nikopourdeilami, IV, Amir Keyvam Khandani, Hua Xu, Ming Jia, Peiying Zhu, Dong-Sheng Yu
Estimating the term…
A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords ci, where i is a unique codeword index for each codeword ci. Each codeword defines weighting factors to apply to the MIMO signals, and may correspond to channel matrices or vectors to apply to the MIMO signals prior to transmission from the respective antennas of the MIMO transmitter. The present invention creates codeword subsets S1 for each codeword c1 of the codebook C. Each codeword subset S1 defines L codewords cj, which are selected from all the codewords ci in the codebook C. The codewords cj in a codeword subset S1 are the L codewords in the entire codebook that best correlate with the corresponding codeword ci.
A method of providing feedback from a multiple-input multiple-output (MIMO) receiver, the method comprising, at the MIMO receiver:
A multiple-input multiple-output (MIMO) receiver configured for providing feedback, comprising:
Dependencies are inferred from the claim text.