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Joint Modulation Classification and Detection Using Sphere Decoding
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DOI：10.1109/LSP.2009.2024805.png)
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Abstract
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In this letter, we propose a simple yet effective modulation classification method for maximum likelihood multiuser detection. Our method is a modification of generalized likelihood ratio test (GLRT) that approximates the optimal classifier in the Bayesian sense. We show that the proposed method can be implemented by modifying the sphere decoding algorithm to support multimodulation. Simulation results in multiuser detection in high-speed downlink packet access (HSDPA) system show that the proposed method offers considerable performance gain over conventional RAKE and MMSE algorithms.
Keywords:
Generalized likelihood ratio test (GLRT)
modulation classification
multiuser detection
sphere decoding
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