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基于Kasami编码的多波束多焦点发射聚焦方法

DOI: 10.11990/jheu.201408028

Keywords: 浅水多波束, Kasami编码, 多焦点发射聚焦

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Abstract:

针对浅水多波束近场测深中发射未聚焦和单焦点发射聚焦导致纵向分辨力下降的问题,提出了基于Kasami编码的浅水多波束近场多焦点发射聚焦方法.讨论单焦点聚焦原理,并引入具有优越相关性的Kasami编码信号解决多个焦点信号之间的相互干扰问题,通过公式推导了其发射和接收原理,并通过仿真对发射未聚焦、单焦点聚焦和多焦点聚焦3种情况的目标回波强度进行比较,分析表明多焦点聚焦方法具有更窄的发射波束宽度和更高的积分旁瓣比(ISLR),采用国产首套浅水宽覆盖多波束测深系统进行了水池实验验证,结果表明本方法有效的提高了浅水多波束近场测深的纵向分辨力.

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