dispread造句

• In this modified algorithm , channel estimation is made by dispreading the received signal of dpcch with a corresponding long gold sequence and pilot ovsf , followed by averaging
  本文将dpcch中的导频信号解扰、解扩，再将它们与已知导频信号相乘得到的信道估计值进行平均，从而得到最终的信道估计值。
• In order to meet the needs of dsss signal reconnaissance , a method of dispreading without the code is brought forward by this paper ， in which the local code is gained from the dsss signal . so we can intercept dsss signal with low snr even if the spreading code is unknown . liu jie ( communication and information system ) directed by prof . gao huisheng
  为适应电子战中对直扩信号侦察的需要，本文提出一种了无码解扩的方案，采用从直扩信号中获得本地参考信号的方法，可以在没有扩频码的情况下，截获低信噪比直扩信号的通信信息。
• The double - start positioning system is an all - weather and regional satellite positioning system , developed independently by our country . this paper discusses the cpu implementation of the dispread subsystem in the double - start positioning system to carry out the main control of the system and to finish the information frame processing . the hardware platform we used is based on cirrus logic ' s ep7312 develop board
  在北斗卫星地面用户机解扩分机的研制中，其主控模块的设计开发采用目前流行的基于arm架构的嵌入式微处理器设计思想，以cirruslogic公司ep7312嵌入式处理器为核心的片上系统soc设计开发， ep7312处理器是专门为低成本、超低功耗的应用设计的。
• By complementing the proposed scheme with methods to estimate the fractional code delay , the acquisition unit an provide high quality delay estimates such that it can instead of the delay locked loop in the traditional ds receiver . after dispreading successfully , this dissertation introduces a method to estimate the doppler - shift directly from some samples based maximum likelihood estimation , and then revise it forwardly
  在成功解扩之后,本文利用最大似然估计从l个样点中直接估计出残余多普勒频偏,并进行前向频偏校正,来代替传统扩频接收机中的科斯塔斯环,经仿真证明该方法的估计精度完全满足解调的要求。
• One of which is based on the maximum signal - to - noise ratio ( msnr ) criterion , it can improve the performance of the array system only when the processing gain of the given cdma system is high enough such that the desired signal can become dominant after dispreading . the other is based on the maximum signal - to - interference - plus - noise ratio ( msinr ) criterion , and it has well performance when strong interferers occur
  一种是基于最大信噪比准则的算法，该算法适用于cdma系统的处理增益比较大，即解扩以后期望用户信号远大于干扰信号的情况；另一种是基于最大信干噪比准则的算法，该算法在强干扰存在的情况依然有较好的性能。