| 摘要 |
Receiving circuits for radio signals comprising an algebraic equaliser (3) which is connected between a tuner (1) having a channel amplifier (2) and decoder (5) with amplifier (6). After the channel is measured with a known broadcast signal, part-signals which are closely adjacent s1kc1 + s1mc1 and s1kc2 + s1mc2 and s1kck + s1mck and so forth are combined by means of a digital signal processor (7) to form a resultant replacement signal and are arranged equidistantly SIGMA cis1(t- tau i), the length of the time intervals tau i being selected to be equal to the symbol length Ts or, in the case of over sampling, be equal to an integral part thereof i.Ts. Suitable coefficients ci are calculated via the ratio between the determinant Di and the coefficient determinant D, the equalisation of the signal achieving an approximate accuracy depending on resolution, and the subsequent k + 1 messages being determined in the same manner or with knowledge of the first k messages s1i, in accordance with the equation: s2(k+1) = s1(k+1).c1i<2,k+1> + SIGMA cis1iMA |
