| 摘要 |
A transversal filter comprising: a series connection of M+L delay cells (12) defining M+L+1 signal samples; M+L+1 branches each having a midpoint connected to receive a respective one of said signal samples and first and second multipliers (10, 11) for multiplying its signal sample by respective first and second coefficients; and first and second summing circuits (13, 14) respectively connected to sum the outputs from said first multipliers (10) and from said second multipliers (11), wherein a wideband phase shifter (17) is associated in series with each delay cell (12), said phase shifter providing a phase shift delta phi such that delta phi = OMEGA 0T (modulo 2 pi ) where OMEGA 0 is the angular frequency of the intermediate carrier and T represents the duration of the delay due to a delay cell (12).
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