摘要
根据实际调查结合文献记载,整理出湘西共有林木资源101科、321属及891种(含栽培8科、29属及76种),大致可分为用材、园林、经济林及薪材等4大类.杉木在湘西林木资源中占有重要的地位,共有3科、6属约10种被统称为"杉木",不仅被誉为"万能之木",而且具有特定的文化含义.林木资源对湘西社会经济发展意义体现在林业经济、生态维护和林木文化3个方面.
The combined technology against multiple access interference is a new research field. This arti- cle combines smart antenna with the multi-user detection to suppress coherent interference and to im- prove the bit error rate of the system. In addition,it adopts these key technologies for wireless resource utilization. The paper puts forward a CDMA system model of using multi-user detection after smart an- tenna,and meanwhile introduces the adaptive filter based on LMS algorithm to eliminate the narrow band interference. At last,it analyzes the nature through Matlab simulation. The results show that the joint anti-interference has better bit error rate performance.
出处
《吉首大学学报（自然科学版）》
CAS
2015年第2期71-76,共6页
Journal of Jishou University(Natural Sciences Edition)
基金
湖南省教育厅科学研究重点项目(09A073)
湖南省生态学重点学科建设项目(JSU0713)
并于2013杉木文化国际研讨会上报告交流
关键词
林木资源
文化
湘西
CDMA system
smart antenna
multi-user detection
LMS algorithm
adaptive filter
