基带

Update or Restore your iPhone 2G with iTunes then use PwnageTool to do the magic, 'nuff said, you don't need to worry about anything, the baseband will be unlocked, the phone jailbroken.

一代Iphone用户可以使用PwngaeTool直接升级，nuff说，你不需要担心任何事，基带将被锁住，并且越狱。

Chapter 3: Introduces the history of Low density parity check codes and some construction methods and BP decoding algorithm.

第二章 分析了各种因素对OFDM相干解调的影响，提出了一种IEEE802.11a OFDM基带系统的载波频偏综合估计算法，并给出性能仿真结果和分析。

The correlation detection using the periodicity of the direct sequence autocorrelation function can estimate the symbol period at intermediate frequency or at baseband. Simulation results indicate that the former is superior to the latter when the demodulated frequency is unequal to the carrier frequency.

时域相关检测方法利用扩频信号的周期自相关特性，能在中频和基带对扩频码周期进行估计，仿真结果表明中频检测时性能较好。

This thesis research the realization of IEEE 802.16d standard 256 OFDM PHY baseband system based on FPGA.

论文就WiMAX论坛重点关注的IEEE 802.16d标准256 OFDM PHY基带系统的FPGA高效实现进行了研究。

The characteristic of residuary bit errors in satellite baseband channel affects the performance of communication protocol in upper layers significantly.

卫星通信信道的基带残留误码特性直接影响上层通信协议的性能。

It offers a new resolvent for serial data processing,and has being used in a actual project.

所以，曼彻斯特编码作为一种基带调制的方式广泛应用于工业控制

This pulse also helps "train" the base-band coupling capacitor in the ASH radio for best data slicer noise rejection.

这也有助于脉搏"一条龙"在灰无线电基带耦合电容器最佳的数据限幅器的噪声抑制。

Signals of before and after NR decoding are entered to subtracter to obtain error signal, which is multiplied by imaginary part of the output of equalizer FIR so as to obtain output of discrimination phase.

本发明包括一个复均衡器的FIR、DFE、复乘器、加法器、NR解码器、减法器、实乘器、累加器、限幅器，它与均衡器结合，使解调后处理得到的复信号由I和Q路组成，经过复均衡FIR，输出仍为复信号，它与总相差φ复乘，进行相位解旋，之后取出实基带信号与DFE输出送入加法器得到均衡器输出，进入一个NR解码器后得到信号送入DFE作为输入，NR解码前后的信号进入减法器得到误差信号；它和均衡器FIR输出的虚部相乘得到鉴相输出，去噪声和限幅后进行相位解旋，去除相位偏差和相位抖动。

It implements intelligent switching such as connection and disconnection on computer baseband digital communication of telephone wire.

通过它可以完成计算机基带数据通信双方电话线物理链路的智能转接。

That is to say, by using the special digital converter or running relevant arithmetic, it converts the radio signal to intermediate frequency signal and completes the base-band signal process that isn"t the veriest SR and is named "software defined radio. This paper introduces the rapid system prototype into the design of software radio system, which has great advantage because rapid system prototype technology can be used to describe the future application.

由于受到硬件性能如A／D、D／A及DSP芯片处理速度的限制，目前的软件无线电系统多采用折中的实现方案，增加专用的数字变频器或者运行数字变频算法，将射频信号变频到中频，然后再进行基带信号处理，这样的软件无线电系统又被称之为"软件定义无线电"，它并不是真正意义上的软件无线电。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。