| 摘要 |
A method and apparatus for deriving the channel estimation within a packet based transmission system having a predetermined number of tones (N), wherein each channel has a channel order (L). A first method includes precomputing, from the long sequence (X) of a received signal, a channel estimation matrix (R<-1>) having a dimension of width and length equal to the channel order (L) and storing one fourth of the channel estimation matrix (R<-1>) since the channel estimation matrix (R<-1>) is centrosymmetric. Advantageously, precomputing and storing a fourth of the channel estimation matrix (R<-1>) saves time and complexity. In a second method, the bit-width requirement for fixed precision requirements regarding implementation in hardware is reduced wherein a channel estimation matrix (G) having dimension of width equal to the number of tones (N) and length equal to the channel order (L) is precomputed and stored. Thereby, not only has the task of precomputing and storing the channel estimation matrix (G) saved time and complexity, but also the bit-width requirement for fixed precision implementation in hardware has been lowered.
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