Ajiboye, Johnson AdegbengaJiya Z.JPaul M.Ajiboye M.AAjiboye D.JMajin R.N2025-04-282024-04-22http://repository.futminna.edu.ng:4000/handle/123456789/1171This paper provides a comprehensive review of Digital Signal Processing (DSP) in communication engineering, elucidating its fundamental principles, practical applications, and recent advancements. Beginning with an overview of DSP's distinguishing features and historical evolution, the paper delineates its pivotal role in processing real-world signals, including speech, image, and seismic data. Furthermore, the introduction of Software Defined Radio (SDR) is examined, underscoring its transformative impact on communication systems by enabling dynamic spectrum access and multi-standard operation through DSP algorithms. Additionally, the emergence of Quantum Signal Processing is explored, highlighting its significance in secure communication through Quantum Key Distribution (QKD) and Quantum Error Correction. Despite the benefits offered by DSP, challenges such as computational complexity and signal distortions are addressed, emphasizing the need for advanced techniques and algorithms to mitigate these issues. Ultimately, this paper elucidates DSP's enduring relevance and innovation in shaping the future of communication engineering.enDigital Signal ProcessingCommunication EngineeringSoftware Defined RadioQuantum Signal ProcessingDynamic Spectrum AccessSignal ModulationBook