quadrature modulation
英
美
网络 正交调制; 正交调变
双语例句
- 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。 - At the same time, we refrain mirror frequency effectively with the method of digital quadrature modulation ( DQM).
同时，由于采用了数字正交调制，从而有效地提高了镜频抑制。 - Based on the idea of the Schmidt orthogonalization and the orthogonal chaotic carriers being generated, a chaos-based quadrature modulation communication system is proposed and realized.
基于施密特正交化的原理，在产生正交混沌载波的基础上，提出并实现了一种基于混沌的正交调制通信系统。 - Optimal Power Allocation for Cooperative Systems Utilizing Quadrature Modulation
一种正交调制协作系统的功率分配方法 - 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。 - 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。 - Quadrature modulation implementing narrowband bandpass filtering
正交调制实现窄带带通数字滤波器 - 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。 - 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。 - 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 - 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。 - In various quadrature modulation circuits, the phase shift network with 90 ° broad band is an important one. This paper discusses the design and the achievable method of the phase shift network with 90 ° broad band.
在各种正交调制电路中，宽带90°相移网络是一种重要的电路，本文就宽带90°相移网络的设计思想与实现方法进行了讨论。 - The amplitude and phase errors of the LFM signal generators using quadrature modulation technology are mapped into baseband. Then a method using complex coefficients FIR filters to calibrate the errors in digital domain is presented.
提出了一种将正交调制LFM信号产生系统的幅相误差映射到基带后，在数字域利用复系数FIR滤波器进行校正的方案。 - 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。 - The Method of Reconstructing Optional Spectrum Signal and Digital Quadrature Modulation Based on DDS
基于DDS的任意频谱信号重构与数字正交调制方法 - 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。 - 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 - The fading statistics is achieved by in-phase and quadrature modulation at the radio signal by two independent Gaussian noise signals.
该设备由软件和硬件组成，用两个独立的高斯噪声信号对无线电信号进行同相和正交调制，相加后得到瑞利衰落信号。 - 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。 - 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。 - An analysis of two kinds of methods based DDWS techniques to synthesize IF signal: Digital waveform synthesis based on the IF sampling and base-band digital waveform synthesizer+ digital quadrature modulation to generate radar signal via. 3.
分析了两种基于DDWS技术合成中频信号的方法：基于中频采样的数字波形合成和基带数字波形合成+数字正交调制产生雷达信号的设计方案。 - RF signal is synthesized by the method of digital baseband signal and quadrature modulation.
整个射频信号的合成则采用基带信号合成加正交调制的方式来完成。 - Quadrature Amplitude Modulation is a modulation mode which Mobile Communication Technology expert attaches much importance to in recent years. The information is transmitted on the basis of amplitude and phase in QAM. Different amplitude and phase represent different symbol of information.
近年来，移动通信技术专家非常重视正交振幅调制（quadratureamplitudemodulation，缩写为QAM）技术，它是根据载波的不同幅度和相位代表不同的编码符号，利用了这样的特点来传递信息。 - 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。 - FFT/ IFFT processor is the core data processing unit and is the key to realize data quadrature modulation and demodulation in OFDM system. The design of FFT/ IFFT processor directly determines the performance of the OFDM system.
FFT/IFFT处理器是OFDM系统中数据处理的核心单元，是OFDM系统中数据正交调制和解调的关键，FFT/IFFT处理器的设计直接决定着OFDM系统的性能。 - 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。 - 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。 - 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）。 - 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。 - Instead of using the method of the popular quadrature modulation, I adopt the lower cost controllable gain amplifier ( VGA) chip for modulation after analyzing the requirements of modulation parameters in protocol, and we get the satisfied results.
通过分析协议中对调制参数的要求，本设计没有采用广泛应用的正交调制，而是采用成本更低可控增益放大器（VGA）芯片进行ASK调制取得了很好的调制效果。