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| 短波接收机射频前端增益校正设计与实现 | |
| 引用本文： | 刘卫华,王李民,周志文.短波接收机射频前端增益校正设计与实现[J].船电技术,2014,34(8):73-76. |
| 作者姓名： | 刘卫华 王李民 周志文 |
| 作者单位： | 1. 92403部队,福州,350007 2. 92493部队,辽宁葫芦岛,125000 3. 海军工程大学,武汉,430033 |
| 摘 要： | 在短波数字化接收机中,通过控制射频前端可变的衰减器或放大器,可以实现模拟增益控制。但无论是压控还是数控衰减器和放大器,器件的非线性都会引起模拟增益分配的非线性,从而影响解调的质量。本文针对这种非线性设计了一种反馈型的自动增益校正方法,并在DSP和FPGA的硬件平台上进行效果测试,结果表明校正后增益误差有了3.2dB的改善。 |
| 关 键 词： | 射频前端 非线性 反馈型 增益校正 |
Design and Implementation of Gain Correction of RF Leading End in Shortwave Receiver |
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| Liu Weihua,Wang Limin,Zhou Zhiwen.Design and Implementation of Gain Correction of RF Leading End in Shortwave Receiver[J].Marine Electric & Electronic Technology,2014,34(8):73-76. | |
| Authors: | Liu Weihua Wang Limin Zhou Zhiwen |
| Institution: | Liu Weihua,Wang Limin,Zhou Zhiwen(1. The Unit 92403 of PLA, Fuzhou 350007, China; 2. The Unit 92493 of PLA, Huludao 125000, Liaoning, China; 3. Naval University of Engineering, Wuhan 430033,China) |
| Abstract: | Analog gain control can be realized by controlling variable attenuator or amplifier of RF leading end in shortwave digital receiver. However, no matter the attenuator and amplifier are voltage-controlled or digital-controlled, the nonlinearity of devices will cause the nonlinearity of assignment of analog gain and impact demodulation quality. This paper designs a feedback automatic gain correction method aimed at the nonlinearity and tests effect on the hardware platform based on DSP and FPGA. The results show that 3.2dB improvement of gain error is reached. |
| Keywords: | RF leading end nonlinearity feedback gain correction |
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