| http://www.w3.org/ns/prov#value | - where {circumflex over (??)}TRN 2 is the first noise power estimation, STRN(k) is the ideal training sequence, ??(k) is the channel estimate, yTRN(k) is the received data sequence, k is a discrete time index, the symbol * represents the convolution operation, the operator ???x??? is defined as the sum of square of a vector x with components xk as follows ??? x _ ??? = 1 K ??? k K x k * x k * where
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