preamble是什么意思

网络释义

用法例句

Firstly,through estimating Doppler frequency by instantaneous frequency measurement,the method not only corrected the frequency offset of PCM/FM signal,but also improved the precision of bit synchronization.

首先通过瞬时测频方法,估计信号中的多普勒频移,不但修正了信号中存在的多普勒频偏,而且提高了码同步的精度。

The method of sequential search used in direct sequence spread spectrum system is unfit for the code synchronization of cyclic code shift keying.

CCSK码字的同步不同于 DSSS系统的 PN码同步 ,他的实现不适合采用 DSSS系统的序贯检测法 ;“多码字相关平滑匹配”法相对于序贯检测法具有明显的优势是 CCSK信号盲检测中实现码字同步的一种快速有效方法。

The digital method of code synchronization based on zero-if;

一种基于零中频的数字化码元同步方法

The algorithm gains the phase information of the modulated signal by calculating the instantaneous phase of the signal,and the instantaneous frequency of signal is reckoned from the phase to implement code synchronization,on the basis of which the threshold detection is realized and the modulated code is resumed.

这种算法通过实时估计信号的相位来提取调制相位信息,并通过相位推算信号的瞬时频率,实现码元同步,进而完成相位判决,恢复出原始的调制码。

Synchronization is very important in communication,and it is directly related to the specification of demodulation,carrier synchronization and code synchronization can be realized easily with a digital costas loop HSP50210.

利用数字COSTAS环HSP50210可以方便地实现载波同步和码元同步。

We combine the error-tolerant technology with no error-tolerant technology to carry out the detection of the frame synchronization code.

提出一种数字传输系统中帧同步码的检测方案 ,利用容错技术和非容错技术相结合来实现帧同步码检测 。

Design and Implementation of RS Decoder and Convolution Code Synchronizer in DVB-S;

DVB-S中RS译码器与卷积码同步器的设计与实现

The Directory Services Restore Mode password will be synchronized with the built-in administrator account password.

目录服务还原模式密码将与内置的管理员帐户密码同步。

Design and Implementation of IEEE802.11a OFDM Symbol Synchronization and Codec Based on FPGA

基于IEEE802.11a的码元同步和编译码的FPGA实现

"Synchronizes or unsynchronizes number and position with remote users.

"与远程用户同步或不同步使用页码和位置。

Object synchronization method was invoked from an unsynchronized block of code.

从不同步的代码块中调用了对象同步方法。

Research on the Rate Transcoding and Synchronization of a Transcoding System;

转码服务系统码率变换与同步技术的研究

This approach enhances the detection velocity and the reliability of the frame synchronization code.

提高了帧同步码的检测速度和可靠性.

Design of the Module-2N+1 Synchronous Counter with Cyclic-Code;

2N+1进制同步循环码计数器设计

A Synchronous Encoder of Video Embedded by Audio in AVS

基于AVS的嵌入式音视频同步编码器

Reaearch and Implement of the Coding and Carrier Synchronization Technique for MT-DS-CDMA Communication

MT-DS-CDMA编码与载波同步研究与实现

A Code-Aided Carrier Synchronization Algorithm Based on APPA

一种基于APPA的码辅助载波同步算法

Study on Resynchronization of Stream Ciphers in Noisy Channel

有噪信道中的流密码重同步方法研究

A Frame Self-Synchronization Method for Low-Density Parity Check Code

一种低密度奇偶校验码帧自同步方法

Design and implementation of E1 network interface in synchronized class cipher machine

同步流密码机中E1接口的设计与实现

GPS L2 CM Code Generation and Synchronization Implementation on a FPGA

GPS L2 CM码产生和同步的FPGA实现方法

The Application of S/CDMA Technology in HFC Network

同步码分多址技术在光纤同轴混合网中的应用

In order to implement real-time correction of distortion, encoder must encode the digital signals synchronously when decoder begins to decode the analog signals.

为了实现畸变的实时校正,要求解码器对模拟信号解码与编码器对数字信号编码必须同步进行。

The CODEC can be used to carry on coding transmission and decoding reception in parallel with code error detection and bit synchronized signal recovering.

该编译码器能进行并行发送编码和接收译码,并带有误码检测和位同步提取的功能。