Coded Many-User Multiple Access via Approximate Message Passing
CoRR(2024)
摘要
We consider communication over the Gaussian multiple-access channel in the
regime where the number of users grows linearly with the codelength. We
investigate coded CDMA schemes where each user's information is encoded via a
linear code before being modulated with a signature sequence. We propose an
efficient approximate message passing (AMP) decoder that can be tailored to the
structure of the linear code, and provide an exact asymptotic characterization
of its performance. Based on this result, we consider a decoder that integrates
AMP and belief propagation and characterize the tradeoff between spectral
efficiency and signal-to-noise ratio, for a given target error rate. Simulation
results are provided to demonstrate the benefits of the concatenated scheme at
finite lengths.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要