同步捕获 meaning in Chinese
synchronization acquisition
Examples
- This scheme is characterized by its simplicity , easy implementation , novel ideas and practical value
该方案同步捕获快,实现简单,具有一定的新意和实用价值。 - However , the longer length of c / a code , the more hardware resource and power it cost . this dissertation commits research on algorithm of c / a code acquisition in satellite navigation position system , and compares the acquisition means of digital differential matched filter ( ddmf ) with traditional means , and also achieves ddmf with the vhdl language and fpga platform
扩频码的周期的加长会给卫星导航定位系统带来许多相应的好处,但问题也就随着之而来了,扩频码的周期越长,同步捕获所需得的时间就越长,而且若用传统的并行捕获方法,将极大的耗费硬件资源,而且系统功耗会随之增大。 - The method was correlate search and fft carrier detection , which could solve the problem of the capture of the spread spectrum code under the condition of low snr and big frequency offset . we also put forward a method , shift receiving window and correlate with local sequence , which not only could solve the problem of symbol synchronization but also could acquire the statistics of the multipath . then we utilized the results of the channel estimation and the technology of rake receiver to decode the received spread spectrum sequence and acquire rude information
方案中提出了：相关搜索、 fft检测信号载波的方法，解决了低信噪比、大频差条件下扩频码的同步捕获难题；滑动相关完成位同步的方法，解决了低信噪比下的同步问题；在时域利用相关进行信道估计，然后利用rake接收技术完成相关解扩的方法，一定程度上解决了多径衰落影响解扩性能的问题。 - The key is that the head - end emits the guide m sequence , which is non - correlative with any users " address code . the phase of all users address code and the head - end address code are combined with the guide m sequence . every user address code phase can attain after the guide m sequence phase is searched and tracked
论文所提出的方案是通过前端发射固定的导频信号，并且在前端和用户端都把用户地址码相位捆绑在导频相位上，使得用户在同步捕获和跟踪导频相位后，间接得到用户的地址码相位。 - To validate the performance of the proposed scheme , the scheme is simulated with fpga , and the simulation result indicates that compared with the conventional pn acquisition schemes , the pn acquisition using auxiliary sequence and binary search can decrease the acquisition time greatly on the same condition
同时，为了进一步验证该同步捕获方案的捕获性能，文中采用fpga器件对捕获方案进行仿真，分析结果表明：与传统的序列捕获方案相比，基于辅助序列和二分法的同步捕获方案可以在系统复杂度和性能不变的前提下，大大缩短捕获时间，实现扩频序列的快速捕获。