相位噪声总是具体的，取决于载波偏移，作为相对于载波偏移的一个单边带噪声。
The phase noise is usually specified, depending on the carrier offset, as a single-sideband phase noise referenced to the carrier offset.
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。
The paper analyzes the interference rejection of Quadrature amplitude modulation signals in the presence of carrier phase jitter, sinusoidal interference and white Gaussian noise.
载波相位噪声对QPS K调制解调的影响是不可忽略的，也是难以分析的。
The effect on modulation and demodulation of QPSK via carrier phase noise can not be ignored, and it is difficult to analyze.
有关OFDM的关键技术，如载波同步、信道估计、相位噪声等，在理论和实践方面均取得了很显著的成果。
Significant results in the key technologies of OFDM, such as carrier synchronization, channel estimation, phase noise and so on have achieved in theory and practice.
为输电线载波通信系统可靠执行它一定能避免，或者应付与，在它的通讯电路遇到的噪声的不同的类型。
For a power line carrier communications system to perform reliably it must be able to avoid, or cope with, the different types of noise encountered on its communications channel.
简要介绍了换流站换流阀的传导噪声的产生、传播方式以及对邻近的电力线载波通道的影响。
This article briefly introduces the produce of transmitting noise caused by converter valves, noise propagation mode, and its affection to adjacent power line carrier channels.
并采用新的相位估计方式估计含相位噪声的载波相位，提升了该条件下的环路信噪比。
With improved phase estimation method, a carrier signal phase with phase noise can be estimated, while loop SNR also increases.
与传统的光学相位差放大方法相比，数字法相位差放大对实验装置要求较低，并且具有易于抑制噪声、载波因子可调等优点。
The method does not need an excellent test setup, and is more easy than conventional optics methods to restrain noise and adjust carrier parameter.
该方法利用DFT迭代算法来重构虚载波的频域信道状态信息，通过时域滤波方法来抑制噪声。
The channel status information was reconstructed by the new algorithm according to a DFT iterative algorithm. Then the channel noise was suppressed by time domain filter methods.
利用计算机仿真方法详细分析不同噪声环境下，载波频差对码跟踪环路输出、码相位差对载波跟踪环路等因素的影响；
Then the influence of carrier frequency error on code loop and influence of code phase error on carrier loop in different noise are discussed in simulation.
提供了一种实现改进残留频率误差和相位噪声估算的、适合于在高频通信系统中使用的单载波调制方案。
A single carrier modulation scheme suitable for use in high frequency communication systems is provided that achieves improved residual frequency error and phase noise estimation.
同时，降低载波环噪声带宽，减小码环相关间隔，从而提高了载波环和码环的跟踪精度。
Additionally, the carrier loop noise bandwidth and the correlator spacing are reduced. Then the accuracy of carrier and code tracking loops is improved significantly.
偶次分谐波混频可有效地抑制载波泄漏、二次混频失真及本振噪声，是提高调制器精确度及直接解调器动态范围的有效技术。
In this paper, we discuss even subharmonic mixing technique which can suppress carrier leakage in microwave direct modulator, or suppress IM2…
在噪声环境下，分析了载波频差对码跟踪环输出的影响。
Then we discuss the influence of frequency offset on code loop in the noisy environment.
研究了LS算法及其DFT改进算法，并将高斯白噪声信道中的信噪比估计方法引入到单载波频域均衡系统中。
LS algorithm and DFT-based algorithm were studied and signal-to-noise estimation algorithms in AWGN channel were introduced to SC-FDE systems.
研究了LS算法及其DFT改进算法，并将高斯白噪声信道中的信噪比估计方法引入到单载波频域均衡系统中。
LS algorithm and DFT-based algorithm were studied and signal-to-noise estimation algorithms in AWGN channel were introduced to SC-FDE systems.
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