本文選題：測控系統(tǒng)　切入點：數(shù)字應(yīng)答機　出處：《電訊技術(shù)》2017年05期

【摘要】：針對數(shù)字應(yīng)答機中相參轉(zhuǎn)發(fā)的技術(shù)問題,提出了改變直接數(shù)字頻率合成(DDS)頻率控制字或相位累加器溢出值實現(xiàn)相參轉(zhuǎn)發(fā)的方法,并對轉(zhuǎn)發(fā)性能、資源需求進行了分析比較,結(jié)果表明,在同等條件下改變相位累加器溢出值的方法性能稍優(yōu),但消耗的邏輯資源顯著減少。該方法將DDS溢出值設(shè)置為與轉(zhuǎn)發(fā)比相關(guān)的常數(shù),避免了利用乘法器進行實時運算的過程,能有效實現(xiàn)高精度轉(zhuǎn)發(fā),且消耗資源少,轉(zhuǎn)發(fā)比可任意設(shè)置。該方法已成功在多個工程中應(yīng)用,滿足測量系統(tǒng)精度的要求。
[Abstract]:According to the technical problems of forwarding coherent digital answering machine, put forward to change the direct digital frequency synthesis (DDS) frequency control word or the phase accumulator overflow value realization method of coherent forwarding, and the forwarding performance, resource requirements were analyzed and compared. The results show that under the same conditions change the phase accumulator overflow value slightly better performance however, the logic of resource consumption decreased significantly. The DDS value is set to overflow and forwarding ratio constant, avoid the process of real-time operation using a multiplier, can achieve high accuracy and less consumption of resources, forwarding, forwarding can be set arbitrarily. This method has been successfully applied in many projects, meet the measurement the precision of the system requirements.

【作者單位】： 中國西南電子技術(shù)研究所;
【分類號】：TN741;TN791

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本文編號：1681018