通过扩频从具有不同速率的数据产生码分多址数据的方法包括步骤:对于每个由m序列构成的正交码序列,合并一个正交码和一个相反的正交码以产生第一正交码序列;合并两个正交码以产生第二正交码序列;合并两个相反的正交码以产生第三正交码序列,从第一,第二和第三正交码序列产生另一个具有两倍正交码码长的正交码;以及...
A spread spectrum communications system includes at least one communication station for transmitting a plurality of digital information data sequences via a plurality of communication channels by using the same PN code sequence. The communication station spreads the respective digital information data sequen...
A new spread spectrum communication system utilizing chaotic frequency modulation of sinusoidal signals is discussed. A single phase lock loop (PLL) system... AR Volkovskii,LS Tsimring,NF Rulkov,... - 《Chaos》 被引量: 52发表: 2005年 Correction to "Optimization of the processing gain of an...
PROBLEM TO BE SOLVED: To reduce a discrimination error for presence of a received packet by eliminating the effect of interference caused between transmission signals to each user in spread spectrum communication. ;SOLUTION: Each reception processing system processes a packet signal that is spread-spec...
In a data transmission system, transmission data is modulated based on &pgr;/4-shift QPSK modulation according to two spreading code sequences which are generated according to a chip timing signal in each symbol interval. At a receiving side, the received spread spectrum signal is demodulated bas...
SPREAD SPECTRUM COMMUNICATION SYSTEM 优质文献 相似文献An Automatic Interference Recognition Method in Spread Spectrum Communication System An algorithm to detect and recognize interferences embedded in a direct sequence spread spectrum (DSSS) communication system is proposed. Based on Welch's ... XM Yang...
SPREAD SPECTRUM COMMUNICATION SYSTEM 优质文献 相似文献An Automatic Interference Recognition Method in Spread Spectrum Communication System An algorithm to detect and recognize interferences embedded in a direct sequence spread spectrum (DSSS) communication system is proposed. Based on Welch's ... XM Yang...
PURPOSE:To decrease the time of fix synchronism from an asynchronous state and to improve the communication efficiency, by separating a fixing loop of frequency synchronization and phase locking of carrier wave from synchronous detection of a PN code. CONSTITUTION:A received spread spectrum signal is...
A new spread spectrum communication system utilizing chaotic frequency modulation of sinusoidal signals is discussed. A single phase lock loop (PLL) system... AR Volkovskii,LS Tsimring,NF Rulkov,... - 《Chaos》 被引量: 52发表: 2005年 Correction to "Optimization of the processing gain of an...
SPREAD SPECTRUM COMMUNICATION SYSTEM 来自 百度文库 喜欢 0 阅读量: 17 申请(专利)号: JP特願2002-40027(P2002-40027) 申请日期: 19920518 公开/公告号: JP特開2002-325284(P2002-325284A)A 公开/公告日期: 20021108 申请(专利权)人: FUJITSU LTD 富士通株式会社 发明人:...