Signal power estimation method based on oblique projection operator
An oblique projection operator and signal power technology, applied in the field of signal processing, can solve the problems of inaccurate signal power, weight design weight deviation, affecting the overall performance of the system, etc., and achieve the effect of reducing the amount of calculation and accurate signal power estimation
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[0030] Example 1
[0031] The purpose of this embodiment is to compare different signal power estimation methods in different signal-to-noise ratio scenarios to verify that the inventive method can achieve accurate signal power estimation. In this embodiment, the number of snapshots is 200, and the signal power is estimated by the steering vector orthogonal approximation method and the signal power estimation method based on oblique projection, and the experiment is repeated 200 times for each signal-to-noise ratio.
[0032] The signal power estimation implementation method of the embodiment is as attached figure 1 Shown. It is known that there are three interferences located at -35, 40, and 70 degrees after high-resolution spatial spectrum estimation. The simulated interference-to-noise ratio is 10dB, the signal is at 0 degrees, and the signal-to-noise ratio ranges from -15dB to 15dB. 5dB is the step size. In the experiment, a uniform linear array with 10 array elements and a h...
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[0033] Example 2
[0034] The purpose of this embodiment is to compare different signal power estimation methods in different signal-to-noise ratio scenarios when the interference azimuth estimation is biased, and to verify that the inventive method can achieve accurate signal power estimation. In this embodiment, the number of snapshots is 200, and the signal power is estimated by the steering vector orthogonal approximation method and the signal power estimation method based on oblique projection, and the experiment is repeated 200 times for each signal-to-noise ratio.
[0035] The signal power estimation implementation method of the embodiment is as attached figure 1 Shown. It is known that there are three interferences at -35, 40, and 70 degrees after estimation of the low-resolution spatial spectrum. The simulated interference-to-noise ratio is 10dB, the signal is at 0 degrees, and the signal-to-noise ratio ranges from -15dB to 15dB. 5dB is the step size. In the experiment,...
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