RIA: Non-Orthogonal Multiaccess Signalling Schemes

本研究是对带宽受限和/或衰落信道中的非正交多址信令方案的研究，它是传统正交信令方案的推广。这些信令方案是从信息论的观点来研究的，工作寻求使用这些信令策略的信道的容量区域，即最终性能极限。此外，这项研究将解决设计签名波形以达到这些性能限制的问题，并试图建立签名波形设计和多用户编码理论之间的关系。在对码分多址(CDMA)信道(非正交信令方案的特例)进行了卓有成效的分析之后，该项目建议将工作扩展到包括一般模型。希望开发一个包括传统信令策略以及最近开发的码分多址方案的多址信令的统一理论。这种方法将扩大对多用户通信的理解，并导致多用户信令的创新设计。实际上，该项目的成果可能会在移动通信中发挥重要作用，在移动通信中，带宽高效的多路访问信令策略对发展至关重要。

This research is a study of non-orthogonal multiaccess signalling schemes, a generalization of the conventional orthogonal approach, in bandlimited and/or fading channels. These signalling schemes are studied from the information theoretical viewpoint and the work seeks the capacity regions , the ultimate performance limit, of channels using these signalling strategies. Moreover, the study will address the issue of designing signature waveforms to achieve these performance limits, and attempts to establish relationships between signature waveform design and multiuser coding theory. Following fruitful analysis in the code-division multiaccess (CDMA) channel, a special case of non-orthogonal signalling schemes, the project suggests the extension of the work to include the general model. It is hoped to develop a unified theory in multiaccess signalling that includes conventional signalling strategies as well as the recently developed CDMA scheme. This approach will broaden understanding in multiuser communications and lead to innovative designs in multiuser signalling. Practically, the outcomes of this project are likely to play an important role in mobile communications where bandwidth efficient multiaccess signalling strategies are crucial for development.