Abstract
Evolutions in the field of digital communications and information science has resulted in the global level communications at our finger tips, and, ample applications started using digital technology over the past decades. In support of this, various technological developments have come up with a goal of satisfying the user requirements globally. However, developing a decoding strategy for a digital transmission scheme has become one of the thrust areas for the researchers in the current scenario. With this motivation, this paper presents an innovative decoding strategy for a coded modulation scheme, based on a Key generation on the receiving side, and, the resulting methodology is called Key-Based Decoding Algorithm (KBDA). The motivating factor in the development of KBDA is to improve the performance of a digital transmission scheme in the presence of noise and interference. To aid the Key-code generation functionality on the receiving side, a Key is sent from the transmitter end on timely basis, and the specific time-interval is called state-set interval which is a variable parameter in the KBDA. Innovative processing steps are introduced into the KBDA to aid the data estimation functionality during demodulation and decoding so that the error involved in the detection process is minimized. The KBDA has the flexibility to decide on the state-set interval within the acceptable range of an application. In the present work, the KBDA has been implemented on the Four-state Sixteen-QAM coded modulation scheme through simulation, and improved decoding performances have been recorded by plotting the characteristic graphs.
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Shivakumar, V. (2021). Key-Based Decoding for Coded Modulation Schemes in the Presence of ISI. In: Singh, M., Tyagi, V., Gupta, P.K., Flusser, J., Ören, T., Sonawane, V.R. (eds) Advances in Computing and Data Sciences. ICACDS 2021. Communications in Computer and Information Science, vol 1440. Springer, Cham. https://doi.org/10.1007/978-3-030-81462-5_33
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