Compared to the three or double channels tracking system , this system can reduce the system cost by half or more , and some extra technology demands can be ignored 比之三通道單脈沖或雙通道單脈沖技術,它的信道設備量減少了三分之二或者二分之一,而對多信道的一些技術要求已可以不必考慮。
The author analyzed layered coding , multi description coding , technology of recover and hiding of errors , providing the approach " a approach of a multi description coding base on space domain dividing " , and then give a experiment to testify it 作者在文中較為詳細的分析介紹流媒體編碼中的分層編碼、多描述編碼和錯誤恢復隱藏機制,提出“基于空域分離多信道的多描述編碼方案” ,并佐以實驗數據驗證。
For power control of listening users , forward power control method are introduced based on full , multichannel , filtered report , and collision method etc . the full report method has redundancy report information , and its real - time performance is bad , multichannel report is introduced to improve the real - time performance , and filtered report is introduced to eliminate the redundancy information , finally the collision method introduced can not only get higher real - time performance but also diminish the redundancy information ; 2 . in order to meet the requirements of making the dynamic simulation of trunking group system , the ms ’ s random move equation is brought forward , the simulation of ms ’ s distribution is done and the integrated channel model are presented ; 3 . the smart predicative model of power control is introduced to overcome the delay and track the change of the complicated network , with this model , the power control ‘ s performance is greatly improved 全匯報方法存在冗余的匯報信息,而且實時性較差,為了改善實時性提出了多信道的匯報方式,為了改善冗余匯報而提出了篩選法,最后介紹的碰撞法在減少冗余信息的同時又提高了實時性;二、為了集群功率控制動態仿真的需要,提出了移動臺的隨機運動方程,進行了有關移動臺的分布仿真,建立了綜合的信道模型;三、希望克服延時和跟蹤復雜網絡環境變化,提出了功率控制的智能預測模型,通過智能預測模型可以改善功率控制的性能,著重介紹了采用神經網絡的方法實現智能預測的通用模型,從而跟蹤復雜多變的無線環境,諸如慢衰落及快衰落(包括多徑衰落、多普勒效應所引起的衰落)等網絡特征,達到預測功率需求;四、采用二級正交碼和智能天線(空分多址)的方法進行組內用戶的識別,改進功率控制效果;五、話權用戶的前向和反向功率控制方法;六、對引入gota的cdma系統提出了復合容量表示方法,并作容量分析,探討有關gota系統的qos問題。