In land acoustic positioning system,it is a problem that needs to be solved for signal source identifica-tion and the distance between signal source and sound receiving device.On this,frequency-encoding is presen-ted .The encoding consists of two frequency components:signatures section and signal source identification sec-tion,the frequency of two which is not equal.The encoding length is fixed.The frequency of signatures section and length is fixed.The position of which in the encoding is fixed.For this frequency-encoding,a correspond-ing identification algorithms has been proposed.Through an analysis of actual signal processing verified that this method can accurately distinguish signal source and distance error in centimeters,in the 200-meter-wide.%在陆上声定位系统中需要解决信源的识别以及信源距声接收装置之间的距离问题，对此提出了一种频分编码方式。该编码由两种频率组成：特征信号段和信源标识信号段，两种信号段频率不相等。信号编码的长度固定，特征信号的频率及长度固定，同时在编码中的位置固定。那么针对这种频分编码，提出了一种识别的算法。通过对实际采样信号的分析处理已验证该方法能准确的分辨声源，同时在200 m范围内测距误差在厘米级。
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