A joint carrier-phase-tracking algorithm based on signal combining is proposed for carrier phase tracking of quadrature amplitude modulation ( QAM ) signals. 针对低信噪比下QAM信号的载波相位跟踪问题,提出一种基于信号合成的联合载波相位跟踪算法。
Quadrature amplitude modulation ( QAM ) is a technique that transmits information by both amplitude and phase modulation. 正交幅度调制(QAM)(QAM)是一种同时利用幅度和相位传递信息的技术。
Quadrature Amplitude Modulation(QAM) ( QAM ) is used to transfer signals by digital TV system based on DVB_C standard. 基于DVBC标准的数字电视系统采用正交幅度调制(QAM)(QAM)传送信号。
The phase diversity reception of the amplitude modulation signal, the application of quadrature amplitude modulation ( QAM ) signal in the coherent optical system, and the automatic polarization control in the coherent optical system are studied in this thesis. 本文主要对调幅信号的相位分集接收,正交幅度调制(QAM)(QAM)信号在相干光通信系统中的应用,以及相干光系统中的自动偏振控制技术进行了研究。
The performance with an additive white Gaussian noise ( AWGN ) and Rayleigh fading channels are compared to a coherent 16 quadrature amplitude modulation ( QAM ). 在加性高斯白噪声(AWGN)和Rayleigh衰落信道下比较了其与16QAM相干调制器的性能。