IEEE802_11b中补码键控技术.pdfVIP

( ) , 31 , 3 , 67-69, 80 , 2011 9 Journal of Baoji University of Arts and ciences ( Natural cience) , Vol. 31, No. 3, pp. 67-69, 80, ept. 2011 DOI: CNKI: 61- 1290/ N. 1607.003 htt p: / / ww w. cnki. net/ kcms/ detail/ 61. 1290. N. 1607.003. html * IEEE 802. 11b 1 2 元锋刚 , 李翠翠 ( 1. 91033 , 266000; 2. , 266000) : 研究一种高速直接序列扩频方法 补码键控调制方式 CCK ( Complementary Code Keying) 首先介绍补码序列的 义性质产生方法以及使用多相补码的CCK 调制解调 的实现, 然后以传输速率 11 Mbps 时的补码序列为例, 使用 Matlab 软件对CCK 调制的编码增益进行 仿真分析 CCK 调制不仅能为系统带来处理增益, 同时可以为系统带来 一 编码增益, 并且具 有较高的频谱利用率 CCK 调制是一种理想的调制方式, 已被广泛地应用于无线通信系统中 : 无线局域网; 补码键控; 编码增益 : T N914 : A : 1007- 1261( 2011) 03-0067-03 Complementary code keying in IEEE std 802. 11b 1 2 YU AN Feng-gang , LI Cu-i cui ( 1. Troops 91033, Qingdao 266000, handong, China; (2. Dept. Communication, North Fleet, Qingdao 266000, handong, China) Abstract: Aim To investigate CCK ( Complementary Code Keying) , a high-speed Direct e- quence pread pectrum method. Methods A fter introducing the definition, properties and methods of production of complementary sequence and implementation of CCK modulation employed multi- phase complementary code, the coding gain of CCK w ith M atlab w as simulated and analyzed by taking the complementary sequence w hich is transmitted at 11 Mbps as example. Results CCK modulation possesses high frequency spectrum efficiency in addition to making the system achieve coding gain and processing gain. Conclusion CCK modulation, one of the ideal modulation methods, has been w idely used in w ireless communication system . ey words: WLAN; CCK; coding gain