| 摘要: |
| 针对S频段联试应答机提出了接收和发射频综共用的改进设计方案，对改进后的应答
机频率关系、组合干扰、信号处理单元以及信道单元设计进行了分析、仿真和测试，结果表
明其功能和性能指标满足S频段测控系统的系统联试要求。该设计在满足接收和发射载波频
率相干转发比的同时节省了一个频综，同以往的S频段联试应答机相比具有硬件电路简单、
成本低、可靠性更高的优点。 |
| 关键词: 航天测控系统 S频段应答机 相干转发比 软件无线电 |
| DOI： |
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| 基金项目: |
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| Improved design of S-band unified test transponder |
| JIANG Xiao-feng |
| () |
| Abstract: |
| An improved design scheme with only one common frequency synthesizer u
sed for RF receiving and transmitting channel of S-band unified test transponder
is proposed in this paper. The improved transponder′s frequency flow, combined
frequency interference, the design of signal processing unit and signal channel
is analysed, simulated or tested. The results show that its functions and perfor
mance satisfy the test requirements of S-band TT&C system. One frequency synthes
izer is saved in this design under the condition that the coherent turn-around r
atio between receiving freq
uency and transmitting frequency is satisfied at the same time. Compared with th
e unimproved one, it has simplified hardware,lower cost and higher reliability. |
| Key words: space TT&C system S-band transponder coherent turn-around
ratio software defined radio |
《电讯技术》编辑部 