18-04-2013 дата публикации
Номер: US20130094344A1
Принадлежит:
A method for data transmission, comprises the steps of modulating data to be transmitted via a transmitter into a plurality of modulated symbols, generating a codebook comprising a plurality of codewords, selecting a codeword from the codebook as a precoding matrix by a predetermined cycling selection, precoding the modulated symbols with the precoding matrix selected, and transmitting the precoded modulated symbols. 144.-. (canceled)45. A method for transmitting in a communication system , the method comprising:scrambling a plurality of bits to be transmitted in one subframe;modulating the plurality of scrambled bits to generate a plurality of modulation symbols; {'br': None, 'i': y', 'i', 'W', 'i', 'D', 'i', 'U,, '()=()·()·'}, 'generating precoded symbols y(i) by'}where W(i) is of size P×v,D(i) is of size v×v and is a diagonal matrix for support of large cyclic delay diversity,U is of size v×v,P is a number of antenna ports, andv is a number of layers, andwherein W(i) can be cyclically selected in a subset of a codebook based on the number of layers v.46. The method of claim 45 , wherein elements of U are defined as U=efor m=0 claim 45 , 1 claim 45 , . . . claim 45 , v−1 and n=0 claim 45 , 1 claim 45 , . . . claim 45 , v−1.47. The method of claim 45 , wherein W(i) can be cyclically selected by modulo N operation of a value derived from i/q claim 45 ,where i is a symbol index, q is v, and N is a size of the subset of the codebook.49. An apparatus for transmitting in a communication system claim 45 , the apparatus comprising:means for scrambling a plurality of bits to be transmitted in one subframe;means for modulating the plurality of scrambled bits to generate a plurality of modulation symbols; {'br': None, 'i': y', 'i', 'W', 'i', 'D', 'i', 'U,, '()=()·()·'}, 'means for generating precoded symbols y(i) by'}where W(i) is of size P×v,D(i) is of size v×v and is a diagonal matrix for support of large cyclic delay diversity,U is of size v×v,P is a number of antenna ...
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