相位噪声

X波段宽带低相位噪声混频锁相频率源

An X band Low Phase Noise Wideband Frequency Synthesizer

本文研究了SAW线性调频信号的相位噪声对雷达发射机性能的影响。

In this paper , influence of SAW linear FM signal phase noise on radar transmitter is analyzed .

基于相位噪声的锁相环IP核选择判据

The Selection Criterion of PLL IP Core Based on Jitter

频率源相位噪声对双站SAR性能影响分析

Analysis of Impact of Oscillator Phase Noise in Bistatic SAR

W波段接收机前端中频相位噪声抵消技术研究

Research on IF Phase Noise Cancellation in W-Band Receiver Front-End

宽带低相位噪声锁相环型频率合成器的CMOS实现

CMOS Implementation of a Wideband Low Phase Noise PLL Frequency Synthesizer

相位噪声下OFDM系统中的信道估计与均衡

Channel Estimation and Equalization in OFDM System with Phase Noise

然而，OFDM系统对频率偏差和相位噪声比较敏感。

However , OFDM is sensitive to frequency offset and phase noise .

OFDM系统中相位噪声的影响与抑制研究

Research on Phase Noise Effects and Mitigation in OFDM Systems

无线通信OFDM系统相位噪声自适应补偿

An adaptive compensation scheme for phase noise in wireless OFDM communication systems

基于CMOS工艺的低相位噪声LC压控振荡器

A Low Phase-Noise LC voltage Controlled Oscillator in CMOS Technology

OFDM系统相位噪声的迭代估计方法

An iteration Phase Noise Estimator for OFDM System

差分LC压控振荡器相位噪声和功耗的优化

Phase Noise and Power Optimization of a 2-GHz Differential CMOS LC VCO

OFDM系统相位噪声的HuberML抑制方法

Phase Noise Mitigation Method for OFDM System Based on Huber ML

本文充分利用了这两种方式的优点，实现了一种能完全覆盖C频段的宽带低相位噪声频率合成源设计。

A scheme of wide-band low phase noise frequency source for C band is presented by making the best of the advantages of the two modes .

最后研究了信源相位噪声（均匀分布、高斯分布）对双基地SAR成像的影响；

Finally , influence of the signal source phase noise error is discussed , including uniform distribution and gaussian distribution .

GS方法恢复低频相位噪声

The low-frequency phase retrieval of GS algorithm

多电平QAM调制对载波的相位噪声非常敏感。

Multi-level Quadrature Amplitude Modulation is very sensitive to carrier phase noise .

但是OFDM技术对频率偏移和相位噪声很敏感，所以同步是OFDM系统中的关键问题。

But OFDM is very sensitive to frequency offset and phase noise , so synchronization is the key problem for OFDM system .

然而，CMOS环形压控振荡器在相位噪声、频率调节范围等性能上仍然有诸多的限制，需要更加深入的研究。

However , the phase noise and frequency range of CMOS voltage controlled ring oscillator are limited , and need further research .

相位噪声对QAM数字微波通信系统误码率的影响

The Effects of Phase Noise on BER of QAM Digital Microwave Communication System

相位噪声对QAM系统的影响及消除方法分析

Analysis of the Effect and Compensation Method of Phase Noise in QAM System

介绍了一种低相位噪声2N分频器的设计。

A very low phase noise 2 ~ N frequency divider is presented .

但是OFDM系统对子载波间的正交性有严格的要求，因此对本振相位噪声较为敏感。

However , the orthogonality between subcarriers is crucial to OFDM , so it is sensitive to the phase noise of local oscillator .

第三章重点介绍了锁相环（PLL）的工作原理，组成部分、相位噪声等技术指标。

The third chapter focuses to introduce Phase Locked Loop ( PLL ) theory , structure and technology index .

但是，OFDM系统对频偏和相位噪声非常敏感，频偏会破坏子载波之间的正交性。

However , OFDM is very sensitive to both symbol timing and carrier frequency offset , so it is probably to produce inter-carrier interference .

8mm脉冲放大链相位噪声测试系统

A phase noise test system of pulse modulated millimeter wave amplification chain

根据对相位噪声的建模，分析了一种基于Viterbi算法的相位估计技术，并结合该技术提出了更高灵敏度指标的全相干积分算法。

Through modeling the phase noise , a phase estimation technology based on Viterbi algorithm is analyzed .

近几年次谐波注入技术更是被用来改善锁相环（PLL）的相位噪声。

Recently , subharmonic injection can be used to improve the phase noise of the phase locked loop ( PLL ) .

但是OFDM系统要求子载波严格正交，且其符号周期较长，所以对相位噪声非常敏感。

However , OFDM system requires the orthogonality between sub carriers , and due to long symbol duration , it is very sensitive to phase noise .