| 摘要 |
PROBLEM TO BE SOLVED: To precisely detect a direction of a modulated signal source. SOLUTION: Plural antennas 12 of prescribed constitution receives a signal from the modulated signal source, and each multiplier 16 multiplys each output of the each antenna by an individual pseudo random number code to generate a spectrum-dispersed output signal. An adder 20 sums up the plural spectrum- dispersed output signals to generate a summed-up output signal. A down- converter and digitizer 22 demodulate the summed-up output signal to generate an intermediate frequency signal. A DSP engine 24 analyzes the intermediate frequency signal, and finds a relative phase or a relative time of an arrival of a signal from the modulated signal source in the each antenna using one of the antennas as a reference, so as to find the direction of a modulated signal source. |
