The deep-frequency music grew louder by degrees, nearly past pleasure into discomfort, but not quite.
In this experiment, DOA estimation of signal 1 and signal 2 are carried out by time-frequency MUSIC and polarized time-frequency MUSIC algorithm.
Figure 4 is the spatial spectrum obtained by time-frequency MUSIC algorithm and polarized time-frequency MUSIC algorithm to signal 1 and signal 2, each algorithm has been done three independent experiments.
The DODs of the targets are first estimated using the time-frequency ESPRIT [20] and their DOAs are then obtained using time-frequency MUSIC [13].
Therefore, the STFD matrix can be applied to the subspace class algorithm instead of the covariance matrix in the MUSIC algorithm, called time-frequency MUSIC algorithm.
The time-frequency MUSIC and ESPRIT algorithms of integrated polarization information are studied, and the improved algorithm is proposed based on the advantages and disadvantages of both algorithms.
In [7], performance comparison between the Time-Frequency MUSIC (TF-MUSIC) and the conventional MUSIC, in presence of additive noise, is provided.
Taking into account the notations given in the previous section, the results (41) and (46) are valid for both the conventional and time-frequency MUSIC.
Similar to the time-frequency MUSIC algorithm, the polarimetric time-frequency MUSIC algorithm, which integrated polarization information, takes the polarization sensitive array for the model and then do time-frequency transform of the received signal shown in Eq. (2) which can obtain the SPTFD matrix.
This paper focuses on the principle of polarized time-frequency MUSIC and ESPRIT algorithms, and the improved algorithm is proposed based on the advantages and disadvantages of both of them.
