| 摘要 |
A training sequence is created for space-time diversity arrangement, having any training sequence length, while limiting the training sequence to a standard constellation. Given a number of channel unknowns that need to be estimated, L, a training sequence can be creates that yields minimum means squared estimation error for lengths N<SUB>t</SUB>=kN<SUB>PRUS</SUB>+L-1, for any positive integer k>=1, where N<SUB>PRUS </SUB>is a selected perfect roots-of-unity sequence (PRUS) of length N. The training sequence is created by concatenating k of the length N perfect roots-of-unity sequences, followed by L-1 initial symbols of that same PRUS. Good training sequences can be created for lengths N<SUB>t </SUB>that cannot be obtained through the above method by concatenating a requisite number of symbols found through an exhaustive search.
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