The data captured by b3g test tools is used for debugging the module and analysing performance . in addition , the b3g test tools support bits error ratio test based on pseudo - random number B3g测试工具还利用了伪随机( pn )序列对整个系统进行误比特率( ber )的测试。
Although bluetooth adopts frequency hopping to avoid interference , its bit error ratio will rise sharply when there are strong interference in the selected frequency band 尽管蓝牙采用跳频方案来避免干扰,但是当所选择的跳频点上干扰较强时,蓝牙系统的误码率会受到很大的影响。
This paper makes following works . first , the algorithm of fragmenting data packet was put forward according to bit errors ratio . second , the fragmentation data algorithm was used in asymmetry tcp 第二,根据有基站无线局域网的特点,将最优的数据包分割应用于有基站的非对称的tcp协议。
In the last half century , researchers have always been searching good code with rate closing to the shannon theory limitation , error ratio being low and it being to be decoded easily 半个世纪以来,人们一直在寻找码率接近香农理论极限、误差概率小和译码复杂性低的好码(又称渐近好码或shannon码) 。
At last , the ability to prewarn the financial risk between the new financial prewarning model and the classic z - score model were compared in terms of first error ratio and second error ratio 最后,本文利用测试集中样本,将该模型与经典的z计分模型的预警能力从第一错误率和第二错误率两个角度加以比较。
With this inner concatenated codes , the performance of ber ( bit error ratio ) and system capacity can be controlled by adjusting the dimension of stbc ( space - time block codes ) in the inner concatenated codes according to the channel parameters 这种编码方式可以在既定的发射天线数下,根据信道环境的优劣,通过调整内接码中空时分组码维数来控制系统误码率性能和系统容量。
The results of the evaluation experiments for bandwidth utilization and message error ratio show that time - triggered application and very high bandwidth utilization can be achieved with can 2 . 0 bus under the help of hardware periodical interrupt of micro - controller 以该方法进行数据传输时的总线利用率和传输误码率的实验研究表明,该方法可大幅提高can总线的网络利用率。
But compared with wired network , the shortcomings of wireless network are : 1 data transmitting with high bit errors ratio ; 2 move equipment usually powered by battery , so the energy is limited ; 3 the bandwidth of communication is narrow compared with wire networks 但与有线网络相比,无线局域网的缺点是: 1 、数据的出错率高; 2 、移动设备通常依靠电池供电,能源有限; 3 、通信的带宽窄。本文做了以下几方面的工作。
According to the information that reflected the condition of channel , this thesis classified acm into heuristic acm and snr - estimation acm . the system that using the first one of acm decide the scheme of modulation and coding according to the frame error ratio that reflected indirectly the condition of channel , while it using the another of acm decide the scheme according to the snr estimation 根据反映信道状态的信息不同,本文将自适应编码调制技术分为基于探索的自适应编码调制技术和基于信道信噪比预测的自适应编码调制技术,前者根据间接反映信道条件的误帧率和重传次数信息来决定编码调制方式,而后者根据信道信噪比预测的结果调节编码调制方案。
But there exist lots of challenges in streaming media transmission currently . firstly , the bandwidth is insufficient for streaming media transmission , because most bandwidths of end users are very limited . secondly , the current best - effort internet cannot satisfy any qos ( quality of service ) guarantees , considering the delay , jitter , package error ratio , package loss ratio , smoothing , etc . all of the pending issues make streaming media transmission control a research hotspot nowadays 然而目前流媒体传输却存在很多问题,首先是网络带宽不能充分满足流媒体传输的要求,虽然主干网络的带宽非常大,但是有相当部分的终端用户的接入速率还是比较低;其次是目前internet “尽力而为”的服务模式不能满足流媒体传输的服务质量保证,例如时延、抖动、误码率、丢包率和平滑性等。