| 摘要 |
<p>Signal samples from two signal streams are downsampled, filtered and multiplexed for transmission by being fed in parallel to a switching network which feeds samples from the two signal streams (X, Y) alternately to one or other of two phases of filter. Each phase applies a plurality of coefficients (15) to each received sample and then sums the samples to provide a resultant downsampled and multiplexed signal. Receiving apparatus carries out the reverse operation and with interpolation the two original signal streams are reconstructed. </p> |
