【作者】 陈功；

【导师】 金力军；

【作者基本信息】 西安电子科技大学 ， 通信与信息系统， 2001， 硕士

【摘要】 本论文研究一种新的基于混合Ⅱ型ARQ差错控制方式的自适应变速流星余迹通信协议，以用于流星通信子网中，主站和从站之间进行双向通信（单向数据传输）。 首先，作者提出了这种新的协议。为了验证该协议的有效性和可行性，作者进行了仿真。作者模拟了该协议在固定速率和自适应变速两种情况下进行通信的情况，考察了自适应变速所起的作用。最后，在自适应变速条件下，作者将该协议和基于基本ARQ以及基于混合Ⅰ型ARQ的差错控制方式的传统协议通信情况进行了比较，考察了流星余迹通信中，混合Ⅱ型ARQ所带来的好处。 通过仿真，作者发现对于流星余迹信道，自适应变速很重要，采用该方法后，通过量比固定速率传输大很多，而混合Ⅱ型ARQ的差错控制方式比其它两种方式更好，能得到更大的通过量。同时，通过仿真，亦表明协议中所提出的自适应变速的方法，数据结构的组织，编译码的方法等是正确并先进的，这些都为将来实际流星余迹通信系统的研制打下了基础。更多还原

【Abstract】 The aim of this paper is to study a new meteor burst communication protocol which is based on type- II hybrid ARQ with adaptive variable-rate technology. In the subnet of meteor burst communication, the protocol is used for the intercommunication(unidirectional data transmission) between the main station and sub station.Firstly, we propose the new protocol. We test the validity and feasibility of this protocol by computer simulation. Secondly, we compare fix rate data transmission with adaptive variable-rate data transmission to study the benefit of adaptive variable-rate data transmission. Finally , we compare type- II hybrid ARQ , type- I hybrid ARQ with basic ARQ in the condition of adaptive variable-rate data transmission to evaluate the advantage of type- II hybrid ARQ.From simulation, we found that it is very important to change data transmission rate adaptively in the meteor burst communication. Using this method, we can get much more throughput than using fix rate transmission. And we also found that typeII hybrid ARQ is better than other two ARQ protocols in throughput. At the same time, it is shown that the way in the adaptive variable-rate transmission, the organization of data structure and the method of coding and decoding in the protocol are correct and advanced. All we have done make a foundation for the implementation of meteor burst communication system in the future.更多还原