论文标题
基于飞行员的未包含的随机访问，并在准静态褪色状态下具有大量的MIMO接收器
Pilot-Based Unsourced Random Access with a Massive MIMO Receiver in the Quasi-Static Fading Regime
论文作者
论文摘要
在这项工作中，我们在带有多个接收天线的雷利障碍频道上处理未包含的随机访问问题。具体而言，我们考虑了与活动用户数量相比，相干块长度大的缓慢褪色方案，并且可以在一个相干块中传输消息。未包含的随机访问是指一种免费的赠款随机访问形式，在该访问中，用户被认为是A-Priori难以区分的，并且接收器恢复了传输消息的列表，直到置换为止。在这项工作中，我们表明，当相干块长度足够大时，一种基于非正交试验序列的传统方法，具有随后的通道估计和最大比率组合（MRC）（MRC）提供了一种简单的能节能解决方案，其性能可以很好地近似于封闭形式。对于有限的块长度仿真，我们将随机亚采样的DFT矩阵用作PILOT矩阵，低复杂性近似消息传递了活动检测的算法，而最先进的极性代码作为单用户误差校正代码，使用连续的cancellation-cancellation-cancellation-cancellation-cancellation-cancellation-cancellation-cornister-corection-listeration-list-list-list-list-list-list-list-tister-decoder。这些模拟证明了所提出的方法的可扩展性和分析的质量。
In this work we treat the unsourced random access problem on a Rayleigh block-fading AWGN channel with multiple receive antennas. Specifically, we consider the slowly fading scenario where the coherence block-length is large compared to the number of active users and the message can be transmitted in one coherence block. Unsourced random access refers to a form of grant-free random access where users are considered to be a-priori indistinguishable and the receiver recovers a list of transmitted messages up to permutation. In this work we show that, when the coherence block length is large enough, a conventional approach based on the transmission of non-orthogonal pilot sequences with subsequent channel estimation and Maximum-Ratio-Combining (MRC) provides a simple energy-efficient solution whose performance can be well approximated in closed form. For the finite block-length simulations we use a randomly sub-sampled DFT matrix as pilot matrix, a low-complexity approximate message passing algorithm for activity detection and a state-of-the-art polar code as single-user error correction code with a successive-cancellation-list decoder. These simulations prove the scalability of the presented approach and the quality of the analysis.
