| 摘要: |
| 将π/4DQPSK调制与跳频技术相结合，设计了π/4DQPSK跳频调制器。利用FPGA实现了
π/4DQPSK基带跳频调制，并由AD9957完成正交调制、数模转换和一次上变频。设计了
乒乓
方式上变频调制器完成二次上变频及跳频调制。实测结果表明，跳频频率误差小于1 Hz
，换频时间小于2 μs, 瞄准干扰信噪比为8 dB时，误码率低于10-4。 |
| 关键词: 跳频通信 π/4DQPSK 跳频调制 抗干扰 |
| DOI： |
|
| 基金项目: |
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| Design and Realization of a π/4DQPSK Frequency Hopping Modulator Based on FPGA |
| WEI Peng,LI Yong-chao,LU Rui-min |
| () |
| Abstract: |
| Through combining π/4DQPSK with frequency hopping(FH) technique, a π/4DQPSK
FH modulator is designed and implemented. The baseband frequency
hopping is achieved using FPGA. The quadrature modulation, digital to analog co
nversion and first up-conversion are completed using AD9957. The ping-pong up
-converter is designed to accomplish second up-conversion. Test results sh
ow that error of hopping frequency is less than 1 Hz, the time of changing f
requency is less than 2 μs and the bit error rate(BER) is less than 10-4
with spot jamming SNR(Signal-to-noise Ratio) 8 dB. |
| Key words: frequency hopping communication π/4DQPSK frequency hopping modulation anti-jamming |
