1.
Design of HF DS/SS System for Extremely Low SNR;
极低信噪比条件下短波DS/SS系统设计
2.
Research on synchronization of HF signal under extremely low SNR and high Doppler shifts
短波大频偏极低信噪比下同步技术研究
3.
Research on Carrier Recovery for Very Low SNR
极低信噪比环境下的载波同步算法研究
4.
Research and Implementation on HF Technology in Strong Single-frequency-interference under the Condition of Extremely Low SNR;
短波极低信噪比条件下抗强单音干扰技术研究与实现
5.
An Improved Algorithm for P-Code Two Dimension Direct Capture in Extra-low SNR Condition
极低信噪比环境下的P码二维直接捕获改进算法
6.
Carrier-frequency Capture Base on Bispectrum Estimation under Extremely Low SNR and Large Doppler Frequency Shifting
极低信噪比大多普勒频移条件下基于双谱实现载频提取
7.
A Despread and Demodulating Method in Very Low SNR in DSSS
直扩系统一种在极低信噪比下的解扩解调的方法
8.
Study and Simulation of Acquisition Technique for Extremely Low-CNR High-dynamic Signals
极低载噪比高动态信号的捕获策略研究与仿真
9.
A Study on Carrier Tracking FLL for Extremely-low-CNR Highly-dynamic Signals
极低载噪比高动态信号的载波跟踪锁频环研究
10.
(3)S/N (signal to noise ratio) is low about from 1.315 to 1.668 (average S/N).
(3)信噪比很低，估算平均信噪比在1.315一1.668之间。
11.
Simulation and analysis of SNR estimation using iterative gradient at low SNR level
低信噪比时梯度迭代信噪比估计仿真分析
12.
Algorithms for Modulation Recognition of Digital Communication Signals at Low SNR
低信噪比数字通信信号识别算法研究
13.
Method for Parameters Estimation of PN Sequence in the Lower SNR DS/SS Signals
低信噪比直扩信号PN序列参数估计
14.
Automatic Recognition for Digital Modulation Signals at Low SNR Situations
低信噪比下数字调制信号的自动识别
15.
Research of carrier synchronization for low SNR and high dynamic signals
低信噪比高动态信号的载波同步研究
16.
Weak signal extraction and feature recognition to polynomial phase signal in low SAR
低信噪比FPPS的弱信号提取与特征识别
17.
Direct Acquisition of GPS P-Code Under Low-SNR
低信噪比下GPS信号P码直接捕获技术
18.
Low-SNR Image Noise Removal Based on Local Edge-preserving Function
基于局部保边函数的低信噪比图像去噪