例句與造句

1. Ddc ( digital down - conversion ) high - efficiency structure is studied to realize the variable carrier frequency band - pass signal acquisition on wideband condition
   參考軟件無線電設計的概念和國內外相關文獻，提出了多項濾波下變頻結構的fpga實現。
2. Parallel structure of poly - phase decomposition and parallel mixer is applied in the ddc circuit , it solves the bottleneck in mixing and increases the handle speed . the partition of the tuning channel according to the digital mixing sequence , and the ddc by means of decimating first , the low - pass filtering and mixing realize efficiently the down - conversion of the variable carrier frequency band - pass signal . according to the structure of the ddc and the requirement of the frequency
   短數據快速測頻算法的具體實現:使用并行流水線的設計方法,提高了系統(tǒng)的數據吞吐率,在100mhz的系統(tǒng)時鐘下,能夠實時處理400mhz ~ 600mhz速率a / d采樣的數據,在64點采樣, 100mhz系統(tǒng)時鐘情況下,初次測頻占用時間640ns ,以后每次測頻占用時間縮短到160ns ,實時地提供多相濾波下變頻所需的載頻位置信息,縮短了接收機的調諧時間。
3. Filter poly - phase decomposition method is adopted in this dissertation . the partition of the tuning channel according to the digital mixing sequence , and the digital down - conversion by means of decimating first , the low - pass filtering and mixing realize efficiently the down - conversion of the variable carrier frequency band - pass signal
   本文采用濾波器多相分解方法，按數字混頻序列劃分調諧信道，使用先抽取，后低通濾波，再混頻的數字下變頻結構，高效實現了變載頻帶通信號數字下變頻。
4. It's difficult to find variable carrier in a sentence. 用variable carrier造句挺難的