| Summary: | 碩士 === 國立中山大學 === 通訊工程研究所 === 107 === In wireless communication, how to support more user in limit resource have been extensively discussed. Usually, we tend to split the channel or time, and orthogonally assign different pieces to different user. But it still limited by the number of resource, it can not afford the user number more than resource number. Non-Orthogonal Multiple Access (NOMA) is one solution for this topic. Using the delicate design to make more user use the same resource and lower the impact form collision. In this thesis, we propose a efficient non-coherent transmission system in the NOMA scenario. We discuss the transmit structure, transmit symbol design, how to combine with error correction code and its performance. And we discuss the system in Additive White Gaussian Noise (AWGN) channel and Rayleigh fading channel these two different case. From the simulation result we can find our system can achieve the same performance as the traditional Orthogonal Multiple Access (OMA) non-coherent system in the AWGN case. And our system will get the channel diversity in the Rayleigh channel. In this case, our system can improve 7.5 dB to the OMA non-coherent system.
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