| 摘要 |
In a modulated (eg. Gaussian Minimum Shift Keying GMSK) signal decoder subject to Intersymbol Interference (ISI), the signal is filtered to form a sample representing a symbol, comprising a weighted sum of the symbol and its immediate predecessor and successor, then multiplied by a complex sinusoid having, at integer multiples of (eg. four times) the symbol interval, alternately: (i) a zero real component and a non-zero imaginary component and (ii) a non-zero real component and zero imaginary component, to generate a complex value. A constellation may then be generated and the differences to an expected constellation tracked in order to decode the final symbol. |
