multi level quadrature amplitude modulation(MQAM)

The influence of the Amplitude Shift Keying(ASK) modulation depth on energy transmission and data transmission between a reader and a tag in the passive Radio Frequency Identification(RFID) system was investigated.

研究了无源射频识别(RFID)系统中幅移键控(ASK)调制度对读写器与标签之间能量传输及数据传输的影响,推导出了能量传输效率和数据传输可靠性随调制度变化的计算公式,并给出了相应的性能曲线。

The quadrature phase-shift keying(QPSK)modulation technique has widespread application in engineering.

正交相移键控(QPSK)调制技术已经在工程中得到了广泛应用,然而随着电子对抗技术的发展,QPSK的非平衡调制技术水平也得到了相应的提高,以专门针对通信或定位中的QPSK调制进行干扰。

And an all-optical regenerator design scheme for quadrature phase-shift keying(QPSK) and differential quadrature phase-shift keying(DQPSK) signals was investigated through numerical simulations.

对适用于正交相移键控和差分正交相移键控信号的全光再生器进行了仿真。

The Reed-Solomon(RS) codes are used to improve the performance of non-orthogonal FSK systems.

本文首先介绍了非正交频移键控(frequency shift keying,FSK)信号的设计方法,然后介绍加性高斯白噪声信道和平坦Rayleigh衰落信道中非正交2FSK和MFSK信号的设计和检测。