Multiuser detection algorithm for ultra wideband multiple access communication systems 多址通信系統多用戶檢測算法
The communication system of differential code division multiple access and key technology 差分型碼分多址通信系統及相關技術
3 . the dissertation explores over - saturated multi - access communication techniques based on wavelet packet 研究了基于子被包的過飽和多址通信系統。
General specification of satellite communicalion earth station for shipborne communication equipment for cdma 衛星通信船載地球站碼分多址通信設備通用技術條件
This paper discusses the work that we have done about the ( cd ) 2ma ( chaotic digital code - division multiple access ) communication system , whose performance is desirable 本文論述了我們在研究性能優良的混沌數字碼分多址通信系統方面所做的工作。
When we carry through the theoretic analysis , according to the request of cdma communication system for spreading code , we analyze the characteristics of chaotic spreading sequence 在進行理論分析時,根據碼分多址通信系統對擴頻碼的要求,分析了混沌數字擴頻序列的特性。
Finally , we carry out the theoretic analysis on the whole communication system . by comparing the simulation analysis results with m - sequence and gold sequence , we further validate the good performance of the ( cd ) 2ma communication system 最后,對整個通信系統的性能和仿真數據結果進行了分析,并與傳統的小m擴頻序列、 gold擴頻序列進行了比較,進一步驗證了混沌數字碼分多址通信系統的優良性能。
The data of the simulation and the result of the theoretic analysis show that the ( cd ) 2ma communication system introduced in this paper appears to have good anti - interference abilities , low ber , ideal secure properties , great capacity and can be practiced in a simple manner , so it has a very high value of application and a very good developing prospect 理論分析結果和仿真數據顯示,本文給出的混沌數字碼分多址通信系統具有抗干擾能力強、誤碼率低、用戶容量大、保密性好、易于實現的優點,確實具有很高的應用價值和良好的發展前景。
As a complex nonlinear dynamics behavior , chaos is a general phenomenon in nature and is one of the most important discoveries in the 20th century later . chaos , which is generated by non - linear dynamical system , possesses many unusual characteristics and these characteristics enable chaos to have a great charming prospect and practical value in secure communication field . recently , chaotic communication has become a new and promising subject , so this dissertation selects it as research direction , and analyses emphatically the applications of chaos in cdma communication system . the main works are as follows : ( 1 ) chaotic phenomena and its related problems are summarized , and these problems , such as the relation of spread - spectrum code in cdma communication system and chaotic sequences , and the relation of chaotic synchronization and system secret performance , are discussed 混沌是一種特殊復雜的非線性動力學行為,也是自然界普遍存在的現象,被認為是二十世紀末期最重要的科學發現之一。有確定性非線性動力學系統產生的混沌具有許多奇異的特性,顯示了混沌在保密通信等領域有著誘人的應用前景和重大的實用價值,目前,混沌理論在通信中的應用是一個全新的前沿課題。本文以此作為研究方向,著重分析了混沌在碼分多址通信系統中的應用。
Frequency - hopping ( fh ) communication is part of the spread - frequency communication . because of the powerful abilities of multi - address and anti - interference , spread - frequency and fh are used both in military and civil fields more and more frequently . therefore , it is more and more important to detect the frequency - hopping signal 由于擴頻通信、跳頻通信極強的抗干擾能力和多址通信能力,使其在軍事和民用上得到了越來越廣泛的應用,所以對跳頻電臺的偵收也變得越來越重要。