| 摘要 |
An apparatus for detecting an estimated value (â k ) for a symbol (a k ) at a particular time (k), which symbol is supplied to phase modulation and is transmitted by means of a transmission channel with a phase (? k ) that varies over time, has a unit (1) for ascertaining logarithmized weighting factors using forward recursion, a unit (3) for ascertaining complex coefficients using forward recursion, a unit (4) for ascertaining logarithmized weighting factors using backward recursion, a unit (5) for ascertaining complex coefficients using backward recursion, a unit (7) for ascertaining a piece of extrinsic information, a unit (2) for ascertaining the phase factor for the maximum weighting factor using forward recursion, and a unit (6) for ascertaining the phase factor for the maximum weighting factor using the backward recursion. |
