| 1. | A service of the data link level ( logical link control ) in ibm ' s token - passing ring
一种ibm令牌环介质访问控制法中数据链路级（逻辑链路控制）业务。 |
| 2. | On the basis of discussing the analyzed restraint relationship between the link loss and the spot - beam antenna gain a new spot - beam model of optimum design named link level balance spot - beam model is proposed
在分析链路损耗与点波束天线增益之间制约关系的基础上，提出了一种新的点波束优化设计模型链路电平平衡点波束模型。 |
| 3. | Presents an overall link level simulation of mobile terminal receiver structure with smart antenna for td - scdma and describes its building blocks . three smart antenna algorithms and four structures of sa - rake arc simulated and compared based on above model
搭建了td - scdma智能天线移动终端仿真平台，通过双天线系统移动端接收特性的数值模拟，对智能天线算法和4种sa - rake处理结构进行分析。 |
| 4. | The calculation result shows that the model can keep the balance of the link level budget margin among the different spot - beam cellars , the onboard power in satellite can be used more effectively and the model is possessed of better applied value
计算结果表明，该点波束模型能使各点波束小区的链路电平预算余量达到平衡，并使星上功率得到更有效的利用，弥补了现有模型的不足，具有较高的应用价值。 |
| 5. | First we introduce it by presenting the classic 2tx scheme proposed by alamouti . then the orthognal designes for space - time block codes are explored , the detailed analysis of the performance is presented . the link level simulations are performed in the last part
通过alamouti的2天线方案来理解空时分组码，接着研究了空时分组码的正交设计，最后对其性能进行了详尽的分析，并完成了链路级仿真。 |
| 6. | The analysis of the performance and its comparison to space time transmit diversity ( sttd ) are presented in this chapter . the link level simulations are performed . finally we discuss the effects of feedback delay and feedback error on the performance
第五章首先介绍了闭环发送分集的原理；接着对其性能进行了仔细的分析，完成了链路级仿真，并与开环发送分集进行了对比；最后讨论了反馈延迟、错误对性能的影响。 |
| 7. | Simulation base on link level is the simulating of independence components of system , it is made use of simulating of signal transforming and processing , in order to analyses signal character , parameter and processing course in signal level , the result of simulation can provide very important reference for the design and evaluation of system
链路级仿真是系统相对独立组成部分的仿真,主要用于模拟通信信号的实际传输和处理过程,便于从信号层面分析研究通信信号的特征、参数和处理情况,仿真的结果可为通信系统设计和评估提供极为重要的参考依据。 |
