摘要
给出了二相序列非周期二值映射相关函数的定义，在该定义的基础上定义了二值映射相关Ｂａｒｋｅｒ码（简称二值加权Ｂａｒｋｅｒ码），并指出经典的二相序列的非周期相关函数和Ｂａｒｋｅｒ码是本文新定义的相关函数和Ｂａｒｋｅｒ码的特例。新定义的Ｂａｒｋｅｒ码比原意义的Ｂａｒｋｅｒ码多５个码字，而且对原意义下的Ｂａｒｋｅｒ码经加权处理后，可提高主副峰比（长为７的Ｂａｒｋｅｒ码提高２．５ｄＢ，长为１１的Ｂａｒｋｅｒ码提高１．５７ｄＢ），计算机搜索结果证明长度大于１３、小于３１的二值加权Ｂａｒｋｅｒ码是不存在的。
The correlation function of aperiodic bi mapping for the biphase sequences is defined. Based on it,the Barker codes of bi mapping correlation (called bi weighted Barker codes for short) are also defined,the classical aperiodic correlation function of biphase sequences and the Barker codes are special cases of correlation function and the Barker codes newly defined in this paper. The Barker codes newly defined are 5 codes more than the original Barker codes,the peak signaltosidelobe ratio will rise after weighted for the original Barker codes (7 length Barker code to 2.5dB,11 length Barker code to 1.57dB). The result searched by computer proved that Barker codes of biweighted which is longer than 13 length,shorter than 31 length are not exist.
出处
《通信学报》
EI
CSCD
北大核心
1998年第9期87-90,共4页
Journal on Communications
基金
机械工业部教育司科技基金
关键词
二相序列
自相关函数
Barker码
映射相关
biphase sequence, autocorrelation function, Barker code, mapping correlation
