| 1. | Furthermore , combined with fec and interleaving , ofdm shows a high priority in countering the frequency - selective fades and isi caused by multipath propagation
Ofdm的实现主要采用了fft技术，利用现有的数字信号处理器( dsp )已经可以实时实现。 |
| 2. | In wireless communication system , signal fading arising from multipath propagation is a particularly severe channel impairment that can be mitigated through the use of diversity
在移动通信系统中,由于多径传播引起的衰落对信道产生的严重影响可以通过分集技术得到有效的解决。 |
| 3. | The effect of multipath propagation commonly exists in the underwater acoustic channel and the fading which was caused by multipath propagation was the main influence factor of underwater acoustic communication system
水声信道中广泛存在着多径传播效应。由多径传播引起的信号衰落现象是影响水声通信系统性能的主要因素。 |
| 4. | It includes : target detection under sea - clutter and multipath propagation , multipath effects on parameters measure of target , analysis and comparsion of all multipath reduction techniques " performance
它包括海杂波背景和多径传播影响下的目标检测技术研究；多径传播对目标参数测量的影响；各种多径消除技术的性能分析与比较。 |
| 5. | In the end , this paper considered detecting the desired user signal for uplink ds / cdma system . in that case , we need to suppress both mai and inter - chip interference ( ici ) caused by multipath propagation
最后，本文研究了在ds cdma的上行信道中，同时存在多用户干扰和多径传播引起的码间干扰的情况下，对期望用户信号的检测。 |
| 6. | Frequency - selective fading due to multipath propagation is a big obstacle in wireless communication . in the condition , the intersymbol interference ( isi ) comes into being and communication system appears error received symbol
多径传输效应引起的频率选择性衰落是无线通信的一大障碍,使接收信号产生码间干扰( isi ) ,导致通信系统出现误码。 |
| 7. | The third part pay more attention to elevation tracking with monopulse radar while the target is in the horizon region . multipath propagation seriously degrades the performance of elevation tracking and makes the radar unable to work properly
当目标处在这一区域时，信号的多径传播给俯仰角测量带来很大误差，使包括dmc雷达在内的许多雷达难以正常工作。 |
| 8. | The characteristics of the underwater acoustic channel are analyzed in this thesis , with the emphasis on the multipath propagation characteristics . and the underwater acoustic multipath channel model is established on the basis of ray theory
在本论文中，我们对水声信道特性，尤其是水声信道的多径传播特性进行了分析，并且在声线理论的基础上建立了水声多径信道模型。 |
| 9. | When the high rate data is transmitted through bandlimited channels in mobile communications , the intersymbol interference ( isi ) caused by channel distortion and multipath propagation will bring decoding error . it needs to adopt appropriate techniques to remove or reduce this kind of interference
当在带限信道上传输高速数据时，会因为信道畸变和多径效应产生的码间干扰而产生误码，这就需要采用适当的技术来消除或减少这种干扰。 |
| 10. | 2 . in the simulation environment which is deliberately designed for the othr ' s multipath propagation phenomenon , strict and detailed reasoning and demonstrations of the coordinate registration are given . and then a simulation justifies the correctness of the registration
针对超视距雷达多径传播现象设计的一种仿真环境，对其中量测模型的坐标变换给出了严格而详细的证明，然后根据证明的公式设计了具体的仿真示例，并对该坐标变换公式组进行了误差统计。 |
