| 摘要: |
| 针对通信系统工程应用中的电磁兼容性要求，提出了一种加噪信道计算模型，基于该模型开展了共址点频和噪声干扰性能分析。根据分析结论，设计并研制了一种融合了干扰对消技术和射频收发芯片技术并可工作于两种体制的抗干扰收发机。当仅需单体制工作时，该收发机可工作于双天线工作状态，相对于单天线在有效提升灵敏度的同时可有效降低受干扰概率。开展了有线环境下收发机抗干扰性能实际测试，结果与理论分析吻合，在干扰最恶劣的情况下，相比传统接收机灵敏度性能提升了43.9 dB，验证了抗干扰方案的正确性和设计的有效性。该方案解决了常规手段无法解决的同平台共址干扰问题，同时兼顾了设备的小型化和低功耗。 |
| 关键词: 超短波通信 电磁兼容 共址干扰 抗干扰收发机 干扰对消 |
| DOI：10.20079/j.issn.1001-893x.260510002 |
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| 基金项目: |
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| Design of an Ultra-short Wave Anti-interference Transceiver Employing Cancellation Techniques |
| LAI Jianqiang,ZHOU Xingjian,LU Hua |
| (Southwest China Institute of Electronic Technology，Chengdu 610036，China) |
| Abstract: |
| For the electromagnetic compatibility(EMC) requirement in engineer application of a communication system，a calculation model of noisy channel is proposed and the performance of a co-located point frequency and noise interfered receiver is analyzed based on the model.According to the analysis results，an anti-interference transceiver which can operate on two modes is designed and developed.The technique of interference cancellation and radio frequency(RF) receive-transceiver integrated circuit(IC) is applied to the transceiver.When only single-mode operation is required，the transceiver can operate in dual-antenna mode，which compared with the single antenna，effectively improves sensitivity while also reducing the probability of interference.The experimental test results of the transceiver’s anti-interference performance under wired environment are consistent with the theoretical analysis.Under the worst interference conditions，the sensitivity performance is improved by 43.9 dB compared with conventional receivers，which verifies the correctness of the analysis and effectiveness of the anti-interference solution.The scheme solves co-located interference which is intractable for conventional means,while supporting equipment miniaturization and low power consumption. |
| Key words: ultra-short wave communication electromagnetic compatibility co-located interference anti-interference transceiver interference cancellation |
《电讯技术》编辑部 