quadrature amplitude modulation

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网络  正交振幅调制; 正交幅度调制; 正交调幅; 正交振幅调变; QAM调制

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双语例句

  1. 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。
  2. Because of channel distortion and carrier frequency offset, both adaptive equalization and carrier recovery should be taken into account for high-order quadrature amplitude modulation ( QAM) demodulation.
    高阶QAM解调时，由于信道失真以及载波频偏相互影响，自适应均衡与载波恢复需要同时考虑。
  3. The paper analyzes the interference rejection of Quadrature amplitude modulation signals in the presence of carrier phase jitter, sinusoidal interference and white Gaussian noise.
    文章分析了存在载波相位起伏、正弦干扰、高斯白噪声时正交调幅数字系统的抗扰性。
  4. Under the preset BER requirement, the adaptive design criteria of trellis code quadrature amplitude modulation ( QAM) are achieved.
    在满足系统预设可靠性要求下，获得自适应格形编码正交幅度调制（QAM）设计准则。
  5. Multi-level Quadrature Amplitude Modulation is very sensitive to carrier phase noise.
    多电平QAM调制对载波的相位噪声非常敏感。
  6. It gives an adaptive quadrature amplitude modulation ( QAM) method which could be more efficiently used in the multi-path fading channels encountered in mobile radio.
    提出一种自适应矩形多幅度调制方法，能够更有效应用于无线移动通信中的多径衰落信道。
  7. From this point, M-ary Quadrature Amplitude Modulation ( MQAM), MultiCarrier Modulation ( MCM) and adaptive modulation techniques are good candidates in next generation mobile radio system.
    从这一点出发，多元正交幅度调制（MQAM）、多载波调制（MCM）及自适应调制技术成为下一代移动无线系统中最有竞争力的几种候选技术。
  8. A method to identify the modulation levels of M-ary Quadrature Amplitude Modulation ( M-QAM) and M-ary Amplitude shift keying ( M-ASK) was developed to rapidly and automatically identify the modulation levels of digitally modulated signals at low signal-to-noise ratios ( SNR).
    为了快速自动识别低信噪比下的数字幅度调制进制，提出了一种识别M进制正交幅度调制（M-QAM）和M进制幅度键控（M-ASK）的调制进制的方法。
  9. 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。
  10. Simulation and Performance Analysis on the System of Quadrature Amplitude Modulation and Demodulation Based on the Known Channels
    基于已知特性信道的QAM系统的仿真和性能分析
  11. Quadrature amplitude modulation ( QAM) is a way of carrier transmission that has high spectrum efficiency and is easily implemented.
    正交幅度调制（QAM）是一种频谱利用率高、实现较为方便的载波传输方式。
  12. In order to make the limited spectrum range accommodate more communication channels, some linear modulation techniques are proposed, such as QAM ( Quadrature Amplitude Modulation), QPSK ( Quadrature Phase Shift Keying), etc.
    为了让有限的频谱范围能够容纳更多的通信信道，人们提出了一些线性调制技术，如：QAM（quadratureamplitudemodulation）、QPSK（quadraturephaseshiftkeying）等。
  13. QAM ( Quadrature Amplitude Modulation) has been widely used in various digital communication systems due to its high modulation efficiency.
    正交幅度调制（QAM）具有较高的调制效率，被广泛应用于各种数字通信系统中。
  14. Adaptive Trellis Code Quadrature Amplitude Modulation for Multi-Antenna Correlation Channels
    基于多天线相关信道的自适应格形编码QAM调制研究
  15. A low-complexity adaptive quadrature amplitude modulation ( QAM) scheme was presented to increase throughput for multi-antenna communication system with covariance feedback.
    基于多天线相关信道协方差反馈，提出一种低复杂度自适应正交幅度调制（QAM）机制以提高系统发送速率。
  16. Quadrature Amplitude Modulation ( 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）传送信号。
  17. Simulation Research and System Realizing of Multicarrier Quadrature Amplitude Modulation
    多载波正交幅度调制解调的仿真研究及系统实现
  18. Quadrature Amplitude Modulation System of Middle Frequency for Simulated Surface Target
    模拟面目标中频正交幅度调制系统
  19. With the analysis of traditional data transmitting method in power line carrier channel, this paper introduces a new transmission device which adopts octal quadrature amplitude modulation instead of frequency shift keying to achieve the requirement of multi-purpose 1 200 bps data transmitting.
    通过对传统载波数据传输方式的分析，介绍一种新型电力线载波数据传输装置，采用八进制正交振幅调制替代频移键控调制，实现上音频复用传输1200bps数据。
  20. Then the results are analyzed and compared in order to design the applicable system, which are valuable to the system of quadrature amplitude modulation and demodulation.
    通过对得到的仿真结果进行比较和分析，在理论上，得到合理设计QAM系统的方法.这些分析方法和得到的结论对工程中的QAM调制解调系统实现具有一定的价值。
  21. Nakagami channel is a channel model with great flexibility and MQAM ( M-ary quadrature amplitude modulation) has a highly frequency efficiency.
    Nakagami信道是一种适应性较强的信道模型，MQAM（M-aryquadratureamplitudemodulation）是一种频谱利用率较高的调制方式。
  22. An all-digital carrier phase acquisition scheme was presented to solve the problem of carrier phase recovery, which is specially critical and hard in the demodulation of trellis-coded quadrature amplitude modulation ( TC-QAM).
    针对TrellisCodedQAM（TC-QAM）解调系统中载波相位恢复难、收敛速度慢等问题，提出一种全数字方式实现的载波相位恢复方法。
  23. As high efficiency utilization of spectrum, high-order quadrature amplitude modulation ( QAM) has been widely used in digital microwave communication systems, cable TV network, satellite communications and many other fields.
    高阶QAM可以有效地提高频谱利用率，在数字微波通信系统、有线电视网络、卫星通信等领域取得了广泛应用。
  24. Both Quadrature Amplitude Modulation ( QAM) and Low Density Parity Check Code ( LDPC) are widely used in such fields as wireless communication, wired television transmission and satellite communication.
    正交幅度调制（QAM）和低密度奇偶校验码（LDPC）技术应用于很广泛的领域，如无线通信、有线电视传输、卫星通信等领域。
  25. Quadrature amplitude modulation ( QAM) can get a higher channel band efficiency, has been widely used in high-speed underwater acoustic communication.
    正交幅度调制（QAM）可以获得更高的信道频带效率，在高速水声通信中得到了广泛使用。
  26. Quadrature amplitude modulation ( QAM) is a technique that transmits information by both amplitude and phase modulation.
    正交幅度调制（QAM）是一种同时利用幅度和相位传递信息的技术。
  27. Quadrature amplitude modulation is a joint-controlled digital modulation technology of phase and amplitude, which not only has higher spectrum efficiency, but also has higher speed of data transmission in limited frequency band.
    正交振幅调制（QAM）是一种相位和振幅联合控制的数字调制技术，它不仅可以得到更高的频谱效率，而且可以在限定的频带内传输更高速率的数据。
  28. Quadrature amplitude modulation ( QAM) is one kind of high band efficiency, noise immunity modulation technology. Its modulation and demodulation system is simple. For these advantages, QAM is widely used in digital broadcasting and broadband access communication systems.
    正交振幅调制（QAM）具有频带利用率高、抗噪声能力强、调制解调系统简单等优点，目前在数字广播、宽带接入等通信系统获得广泛应用。
  29. In this paper, quadrature amplitude modulation system blind equalization algorithm in high-speed underwater acoustic communication is analyzed and the main work is as follows: ( 1) By studying the principle of MAMA, improved a class algorithm ( CMAMA) based on the constellation features.
    本文研究高速水声通信中正交幅度调制系统的盲均衡理论与算法，主要工作如下：（1）通过研究多模辅助算法的均衡原理，得到了一类基于星座图特点改进的多模辅助算法（CMAMA）。
  30. 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）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。
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