| 1. | After the simulation analysis and experiment data processing , we could conclude tha the inversion method of ray travel time is feasible to sotirce localizaion
从仿真和实验数据处理的结果分析，声传播时延匹配场声源定位是行之 |
| 2. | Based on coarse data of positions of user and satellite , estimation algorithms of propagation delay between different satellites and users are given
基于用户和卫星的概略位置，给出了适用于不同类型导航星和不同用户场景的卫星信号传播时延估计算法。 |
| 3. | Wth the above analysis of ray travel times , a new method of source localization based on ray travel tirne is presented in ans dissendion
综合以上分析，本文尝试了一种新的方法?声传播时延的匹配场声源定位，即运用最早到达的声信号在相邻基元上的时延作匹配场处理。 |
| 4. | There are two ldnds of cost functions in the thesis , the first is based on the ray travel time delay of the adjacent hydrophones ; the second is directly based on eq travel times
文中构造了两类代价函数，第一类代价函数基于相邻基元的传播时延，第二类代价函数基于声传播时间。 |
| 5. | Hence , in the downlink of distributed mimo systems , the transmit signals from different transmit antennas experience different channel propagation delays to arrive in the mobile station
因此在分布mimo的下行链路中,从不同发射天线发射的信号到达移动台所经历的信道传播时延也不相同。 |
| 6. | In satellite navigation and positioning system , time is important information for fast and direct acquisition of long cycle code , one of its important aspects is the uncertainty compression of signal ' s propagation delay to reduce time search range
摘要卫星导航定位系统中，辅助长码快捕的一个最重要的信息是时间信息，卫星信号传播时延估计是提供先验时间信息，减少时域搜索范围的一个重要方面。 |
| 7. | The results from theoretical analysis and simulation show that the ber curve from simulation results agrees well with the curve from theoretical analysis ; in the 2 1 distributed mimo system , ber first decreases and then improves with the increase of the channel propagation delays
理论分析与仿真结果表明,仿真误码率曲线与理论分析的误码率曲线基本吻合; 2发1收分布mimo系统中误码率随信道传播时延的增大先降低后升高。 |
| 8. | Simulation results indicate that the algorithm can reduce the delay ' s uncertainty range greatly , even with great position errors the uncertainty range still can be reduced to the half , and is effective for the fast acquisition of long cycle code
数值计算表明，算法能够大大压缩不同导航星和不同场景用户之间传播时延的不确定范围，即使在用户与卫星位置误差较大的恶劣应用背景下也能将不确定范围压缩一半，从而有效地辅助长码快捕的实现。 |
| 9. | The sound speed distribution of ocean is not uniform , so the sound ray is often curving because of refraction when sound transmitting through the sea channel . this means the time delay between the transmitter and the receiver is larger than the time delay between them in the condition that the sound ray is straightaway , then positioning error is caused
海洋中声速分布是不均匀的，因此由于折射效应，声音在海洋信道传播过程中其声线是弯曲的，声线弯曲意味着声信号从发射点到接收点的传播时延大于声信号直线传播的时延，致使定位产生误差。 |
| 10. | Such as the concrete relation between transfer delay and throughput , the effect of average retransfer delay on transfer delay , throughput and transfer delay are contradictory entity . we can find the minimum net delay when throughput is maximum or the maximum throughput when net delay is minimum through measurable calculation
如：传播时延与吞吐量的定量关系；平均重发时延对传送时延的影响；吞吐量和传送时延是矛盾的统一体等。通过定量的计算我们可以找到在最大吞吐量前提下的最小时延或最小时延前提下的最大吞吐量。 |
