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DDS-baseddesignofthesinusoidalsignalgenerator
- 本设计采用AT89552单片机，辅以必要的模拟电路，实现了一个基于直接数字频率合成技术(DDS)的正弦谊号发生器。设计中采用DDS芯片AD9850产生频率1KHZ~10MHZ范围内正弦波，采用功放AD811控制输出电压幅度， 由单片机AT89S52控制调节步进频率1HZ。在此基础上，用模拟乘法器MC1496实现了正弦调制信号频率为1KHZ的模拟相度调制信号；用FPGA芯片产生二进制NRZ码,与AD9850结合实现相移键控PSK、幅移键控ASK、频移镇键FSK。-AT89552 the singl
BERBPSK
- BER BPSK: Bit error rate for Bi Phase Shift Key
QPSK_OQPSK
- 使用数值仿真和电路实验的方法,对Q PSK ( quadrature phase shift key ing)和OQ PSK ( off2 set quadrature phase shift keying)调制信号通过功率放大器后的频谱扩散问题进行了探讨。-Numerical simulation and circuit experiment using the method of Q PSK (quadrature phase shift key ing) and OQ PSK (off
B07_Ivanovs
- Continuous Phase Modulation (CPM) advantage compare with OQPSK (Offset Quadrant Phase Shift Key)
RC-LC
- 讨论了简单的移相网络的设计原理，以及具体的计算过程，本为10年的TI竞赛技术参考，硬件要求以及电容选择是关键。-Discussion of a simple phase shift network design principles, and the specific calculation process, the competition for the 10-year TI technical reference, the hardware requirements and capacito
Multi-frequency-heterodyne
- 多频外差相移三维测量关键技术,详细介绍了多频外差的原理-Multi frequency heterodyne phase shift key technology of 3D measurement
QAM
- tA scheme of format conversion optical 16-ary quadrature amplitude modulation (16QAM) toquadrature phase shift keying (QPSK) signal based on cascaded four-wave mixing (FWM) in semiconduc-tor optical amplifiers (SOAs) is proposed. Theoretical analysis