实时通用时间压缩式相关器  

Real-time general purpose time-compressed correlator

作　　者：李启虎[1] 孙增[1] 孙长瑜[1] 

机构地区：[1]中国科学院声学研究所

出　　处：《声学学报》1990年第2期146-150,共5页Acta Acustica

摘　　要：六十年代以来,时间压缩式相关器在主动声呐的匹配滤波中得到广泛应用,但是由于受数据长度、采样频率等的限制,这种模型不能直接用于被动声呐。否则会引起数据的丢失。本文提出一种交叉存取式时间压缩相关器,利用一个缓冲存贮器可以实时完成任意长数据的相关运算,从而解决了主、被动声呐中所需的相关器设计问题。文中给出了正序、逆序进动型数据链及移位型正序、逆序数据链的流程图和硬件实现的方框图。本文讨论的方法可用于数字式声呐的设计,大大简化系统和提高声呐性能。The time-compressed correlator has been widely applied in matched filter of active sonar since 1960's. The principles of DELTIC and MACORMATIC can not be directely used in passive sonar due to the limitation of sampling frequency and data length. Otherwise the input data will be missed periodically in the system output. An Alternative Access Time-compressed Correlator (ALATIC) is proposed in this paper, by using a buffer register the correlation operation of arbitrary length can be done in real time. This model is a general purpuse correlator, which can be used in both active and passive sonar. The running positive order and inverse order register and the shift positive order and inverse order model are presented. The hardware implementation and the flow chart graph of ALATIC is also described. The model presented in this paper can be used in digital sonar design.

关 键 词：时间压缩式 相关器 声呐 

分 类 号：TB565.2[交通运输工程—水声工程]