数字应答机相参转发的实现

发布时间：2018-03-29 11:53

本文选题：测控系统　切入点：数字应答机　出处：《电讯技术》2017年05期

【摘要】：针对数字应答机中相参转发的技术问题,提出了改变直接数字频率合成(DDS)频率控制字或相位累加器溢出值实现相参转发的方法,并对转发性能、资源需求进行了分析比较,结果表明,在同等条件下改变相位累加器溢出值的方法性能稍优,但消耗的逻辑资源显著减少。该方法将DDS溢出值设置为与转发比相关的常数,避免了利用乘法器进行实时运算的过程,能有效实现高精度转发,且消耗资源少,转发比可任意设置。该方法已成功在多个工程中应用,满足测量系统精度的要求。
[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.

【作者单位】：中国西南电子技术研究所;
【分类号】：TN741;TN791

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