特性跟踪 meaning in English
performance trace
Examples
- The future wireless mobile communication systems are expected to provide ubiquitous , high - quality , and high - rate mobile multimedia transmission . however , hostile multipath fading radio conditions give rise to serious inter - symbol interference ( isi ) ; even worse , wireless channel are often time varying , which makes the system more vulnerable and more difficult to track the channel state . orthogonal frequency dvision multiplexing ( ofdm ) , which is inherently resistant against isi , has invoked a popular research interest in recent years , and has been a promising candidate technology of the physical layer for future weideband high - date - rate wireless communications . notwithstanding , ofdm is much more vulnerable to errors of both time and frequency synchronization and to that of channel estimation , and how to obtain correct timing and channel estimation efficiently is highly critical to ofdm systems . the dissertation will focus on both of the aspects of ofdm systems mentioned above
但是无线环境的多径特性造成通信系统中严重的符号间干扰,同时无线信道的时变性使得信道特性跟踪复杂。而正交频分复用技术( orthogonalfrequencydivisionmultiplexing , ofdm )正是一种解决符号间干扰的有效传输手段,因此ofdm技术作为未来宽带高速率无线通信的物理层候选技术在当前引起了一股研究热潮。但ofdm系统对定时同步误差和信道估计误差非常敏感,如何在ofdm系统中准确快速地实现符号同步和信道估计是至关重要的,本论文将重点针对这两个问题进行讨论。