MUMBAI, India, May 1 -- Intellectual Property India has published a patent application (202641049684 A) filed by Anurag University, Hyderabad, Telangana, on April 18, for 'frequency-domain enhancement of analog modulation for improved spectral efficiency using distortion-aware modulation shaping.'
Inventor(s) include Dr. Nandoori Srikanth; M. Adhithya Vardhan Yadav; M. Raju; and K. Vignesh Kumar.
The application for the patent was published on May 1, under issue no. 18/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to a method for enhancing spectral efficiency and signal quality in analog modulation (112) systems using frequency-domain processing. The method comprises receiving an input message signal (102) and transforming it into a frequency-domain representation using a Fast Fourier Transform (FFT) module. A distortion (106) aware spectral shaping (108) unit is applied to modify spectral components by suppressing redundant (118) sidebands (120), minimizing harmonics, and reducing spectral leakage. The processed signal is then reconstructed into a time-domain signal (110) using an Inverse Fast Fourier Transform (IFFT) module. The reconstructed signal is subsequently applied to an analog modulation (112) unit configured to perform modulation using Amplitude Modulation (AM), Frequency Modulation (FM), or Phase Modulation (PM). The invention improves spectral efficiency and reduces distortion (124) without increasing bandwidth, and is compatible with existing analog communication systems."
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