Implementation of a Wavelet Transform-based Trans-multiplexer for Satellite Communications
Kaustubh Venkatesh, Gokul Nair, Arseta Singh, Sukanya Kulkarni, Preetida Jani · 2022 2nd International Conference on Emerging Frontiers in Electrical and Electronic Technologies (ICEFEET) · 2022
Satellite communication has become firmly estab-lished as one of three basic techniques for long-distance telecommunications. Multiplexing in satellite systems preserves channel resources and improves the temporal and computational complexity of the system. Filter bank-based multiplexing solutions are gaining popularity in the domain, as they achieve high data rates with relatively low error rates. Trans-multiplexers are applications of filter banks that convert time-division-multiplexed (TDM) signals to frequency-division-multiplexed (FDM) signals for transmission over a channel. Most trans-multiplexer systems use Fourier and Cosine transforms for filter design and signal reconstruction, which do not offer Perfect Reconstruction (PR) as the time domain information of the signal is discarded. This paper presents an algorithm that utilizes wavelet transform techniques for filter design to be used in trans-multiplexers. The work realizes the designed filters and trans-multiplexer system in MATLAB, and its performance is evaluated by testing with various channel models and mother wavelets. The simulated system outperforms a similar conventional system by a factor of 10−4.