| 摘要 |
<p>In a reference signal adaptation estimation portion (15), the phase of a reception signal sample Zn-2 at a time point (n-2) is rotated by M states ΔØn-1 at a time point (n-1), and this value and Zn-2 are used to determine a linear predictor of the reception sample at the time point (n-1) inclusive of fading fluctuation at the time point n in accordance with the following equation: zn-1 + (1+μ)zn-1 - μzn-2exp(jΔØn-1). A square error between the value obtained by rotating the phase of this zn-1 by ΔØn and zn is determined as a branch metric at a branch metric calculation portion (16), and is decoded by a Viterbi algorithm at a Viterbi decoding portion (17) by using this branch metric. A prediction coefficient is sequentially determined by an error minimization algorithm so that a weighted square sum of the error between a reception signal sample at each time point retrospective of each pass and the predictor, after survival passes reaching the M state ΔØn at the time point n are determined.</p> |
