码元速率

MPSK信号的循环谱检测及码元速率估计

Detection and chip rate estimation of MPSK signals based on cyclic spectral density

在谱相关理论和小波变换理论的基础上，提出了小波谱相关方法实现BPSK信号检测与码元速率的提取。

Following the spectral correlation theory and wavelet transform theory , a method named as wavelet spectral correlation method is proposed for BPSK signal detection and chip rate estimation .

基于循环谱包络的BPSK信号码元速率改进估计算法

Innovatory Estimation Algorithm of BPSK Signal Chip-rate Based on Cyclic Spectrum Envelope

估计MPSK信号的码速率，利用连续小波变换提取相位跳变位置，之后采用自相关法得到码元速率。

The wavelet transform can effectively extract the transient characteristics of digital signals to estimate the symbol rate of MPSK signals .

基于HWT的码元速率估计仿真分析

Simulation and Analysis on Symbol Rate Estimation for Digital Modulated Signals Based on HWT

对于带通系统而言，最高码元速率为2WBaud，此时可获得的最高频带利用率为2Baud/Hz。

For band-pass , the highest code element rate is 2W Baud , and the gettable highest rate of frequency band is 2 Baud / Hz .

在AWGN中，分别对于不同信噪比，载波估计偏差，码元速率估计偏差，成型滤波器影响，码间干扰影响等情况进行了分析与仿真。

In the AWGN , the paper analysis and simulate several cases , include the different signal noise ratio , and carry estimation deviation , code speed estimation deviation , molding filter , code the interference influence etc.7 .

利用HHT的分解自适应性和良好的时频聚集性，改进了传统的循环谱检测与参数估计方法，实现了更低信噪比下直扩信号的准确检测和载频、码元速率等参数的有效估计。

The improved approach of cyclic spectrum is proposed by making full use of self-adaptive decomposition and good concentration . Experimental results show that it can detect and estimate carrier frequency and chip rate of DSSS signals accurately in lower SNR .

结果显示：在带宽和码元速率相同的情况下，混沌振子多进制调制解调通信系统的误码率性能能够达到传统非相干OOK接收机的理论极限。

Simulation results show that : under the condition that the occupied bandwidth and the information rate are equal , the anti-noise performance of the communication system based on chaos M-ary modulation and demodulation method can achieve the theoretical limit of the ideal incoherent OOK receiver .

通信对抗中码元速率的盲估计算法研究

Research on Symbol Rate Blind Estimation Algorithms in Communication Countermeasures

提出了一种数字通信信号码元速率的估计算法。

A new algorithm is proposed for symbol rate estimation of digital communication signals .

一种基于小波分析的码元速率估计方法

Code Rate Estimation Based on Wavelet Analysis

实验证明提取的特征在不同的载频和码元速率情况下是比较稳定的。

Experiments prove that the extracted features under the condition of different carrier frequency and symbol rate are relatively stable .

水声信道的时变特性要求自适应均衡器系数以码片速率更新，而不是以码元速率更新。

Time variability of the underwater channel requires that receiver adaptation be performed at the chip rate , rather than the symbol rate .

同时本文将中值滤波和小波滤波结合使用，大大提高了码元速率估计的准确性。

At the same time , the median filter and the wavelet filter are used in combination to greatly increase the accuracy rate .

本文还研究了参数统计方法在估计通信信号的载波频偏和码元速率中的应用。

This dissertation also does research on the application in estimation of communication signals ' carrier offset and symbol rate with the parametric statistical method .

两个矩阵分离度的界变码元速率调制技术的探讨

Bounds about the separation of two matrices The Probing of the Technology about Modulated Signal that the Rate of Transmitted Message is Changeable with Time

常用的检测方法包括检测信号码元速率处谱线的率线检测器和检测信号载频倍频处谱线的载波检测器。

Usual detectors include rate-line detector that detects the line spectrum at the rate of the chips and carrier detector that detects the line spectrum at the harmonics of carrier frequency .

对于接收到的信号，我们可以在没有其他先验知识的情况下估计出信号的信噪比、载波频率以及数字调制信号的码元速率，这些参数的提取有利于信号的调制识别。

Without prior information of signal , we can estimate some parameters of signal , such as signal to noise ratio ( SNR ), carrier frequency , and symbol rate of digital modulation signals . These parameters are advantaged to the modulation identification of communication signals .

对于给定的码元传输速率和行纠错码，电路的工作交错度可有信号的中值电平和多普勒展宽（或信号的中值衰落率）确定。

The operating interleaving degree can be determined by the medium level and Doppler spread ( or medium fading rate ) of signals .

非对称结构包括在发射端的各个具有发射功率不等、调制方式不同和码元传输速率不等。

The unsymmetrical structure has several categories , including the users have different transmit power , the modulation modes of users are different , and the symbol rates of users are unequal .

一种新的跳频宽带瑞利衰落信道模型以每秒1M个码元的字符速率传输，充分利用信道的最大有效带宽。

New model for frequency hopping wideband Rayleigh fading channels 1Ms / s symbol rate exploits maximum available channel bandwidth .

以每秒1M个码元的字符速率传输，充分利用信道的最大有效带宽。时分复用实现对两路或者两路以上信号的合成，旨在提高信道的利用率。

1Ms / s symbol rate exploits maximum available channel bandwidth . TDM is able to synthesize two or more signals to make sufficient use of transmission channel .

本文利用小波变换其强有力的边缘检测性能，检测码元跳变点，从而完成码元速率的准确估计。

In the paper , wavelet transform , which is strong performance in edge detection , is adopted to detect code step-point for an accurate estimation of the code rate .