“A Role of Hilbert Space in Sampled Data to Reduced Error Accumulation by Over Sampling Then the Computational and Storage Cost Increase Using Signal Processing On 2-Sphere Dimension” : Hilbert Space and Its Application in Communication Engineering”. International Journal of Scientific Research and Management (IJSRM), vol. 8, no. 05, May 2020, pp. 386-9, https://doi.org/10.18535/ijsrm/v8i05.ec02.