| 摘要 |
<P>PROBLEM TO BE SOLVED: To encode symbols in a transmitter of a wireless network that uses multiple-input and multiple-output (MIMO) orthogonal frequency division multiplexing (MIMO-OFDM) by partitioning the sub-carriers to be used for transmitting the symbol into a set of K groups of contiguous sub-carriers. <P>SOLUTION: For each group k of N<SB POS="POST">K</SB>-1 modulation symbols D<SB POS="POST">k</SB>(1),D<SB POS="POST">k</SB>(2),...,D<SB POS="POST">k</SB>(N<SB POS="POST">K</SB>-1), the modulation symbol D<SB POS="POST">k</SB>(n), for group k, is mapped to a corresponding mapped modulation symbols X<SB POS="POST">k</SB>(n) according to m(k)=1/(N<SB POS="POST">K</SB>-1)Σ<SP POS="POST">NK-1</SP><SB POS="POST">n=1</SB>D<SB POS="POST">k</SB>(n),X<SB POS="POST">k</SB>(n)=α<SB POS="POST">1</SB>(k)(D<SB POS="POST">k</SB>(n)-m(k))+β(k)(n=1,...,N<SB POS="POST">K-1</SB>),X<SB POS="POST">k</SB>(N<SB POS="POST">K</SB>)=α<SB POS="POST">2</SB>(k)m(k) where m(k) is a sample-mean of the set of modulation symbols corresponding to the kth group, and α<SB POS="POST">1</SB>(k), α<SB POS="POST">2</SB>(k) and β(k) for k=1,...,K, are constants, where the constants are predetermined and positive. <P>COPYRIGHT: (C)2012,JPO&INPIT |
