| 摘要 |
<p>The beam former includes a number of processing channels, each receiving a signal from an element of the transducer array. A digitizing device is used for converting the received signal to digital samples at a sampling rate f. A time multiplexed delay device is responsive to delay coeffts for delaying the digital samples by time multiplexed delays to produce a stream of delayed, time multiplexed digital samples for forming two or more receive beams. A summing device is used for summing the delayed, time multiplexed digital samples to form a stream of time multiplexed output samples that is representative of the two or more receive beams. A coefficient generator is provided for supplying the delay coefficients to the time multiplexed delay device in each of the processing channels.</p> |
