  A new array signal reconstruction and signal-channel DOA estimation method
based on TMLA by nonuniform period modulation are proposed. By using
non-uniform period modulation, the harmonic component produced by different
elements could be separated. Therefore, the conventional snapshot could be
reconstructed by analyzing the spectrum of the combined signal. Then spatial
spectrum estimation method is used to implement DOA estimation. Numerical
simulations are provided to verify the feasibility and accuracy of the proposed
method. Since the duration of the signal in the frequency domain analysis
processed in a single time is very short, this method is also applicable to
narrowband signals. Another highlight is that this method can simultaneously
measure the number of the elements-1 angle of incident signals.
