5ANDREW A A, LLOYD C H, GERD F G, et al. New technology for shallow water hydrographic surveys[J]. International Hydrographic Review, 1998, 65(2): 27-41.
6KRUMMENAUER R, DA SILVA F J, LOPES A. Modified MODEX method for direction finding with improved threshold performance[C]. Telecommunications Symposium, SBT/IEEE International, 2006: 52-57.
7GERSHMAN A B, STOICA E New MODE-based techniques for direction finding with an improved threshold performance[J]. Signal Processing, 1999, 76: 221-235.
8LOPES A, BONATH I S, PERES P L D, et al. Improving the MODEX algorithm for direction estimation[J]. Signal Processing, 2003, 83: 2047-2051.
9VACCARO R J, RAMALINGAM C S, TUFTS D W, et al. Least-squares time-delay estimation for transient signals in a multipath environment[J]. J. Acoust. Soc. Am., 1992, 92(1): 210-218.
10MANICHAM TG VOCCARO R J, TUFTS D W. A least-squares algorithm for multipath time-delay estimation[J]. IEEE Trans. Signal Processing, 1994, 42(11): 3229-3233.
