论文标题
近乎最佳的干扰剥削1位通过部分分支和结合
Near-Optimal Interference Exploitation 1-Bit Massive MIMO Precoding via Partial Branch-and-Bound
论文作者
论文摘要
在本文中，我们根据建设性干扰（CI）的概念，将重点放在向下链路中的大规模天线系统的1位预编码上。通过制定旨在最大化CI效应的优化问题，但受到发送信号的1位约束，我们从数学上证明，在放松1位约束时，所获得的发送信号的大多数已经满足1位约束。基于这一重要的观察，我们通过部分分支和结合方法（P-BB）方法提出了一种1位预码方法，其中仅针对不符合1位约束的条目执行BB程序。提出的P-BB可以在大规模天线场景中使用BB框架，由于其过于良好的复杂性，这不适用。数值结果证明了所提出的1位预码算法的差异错误率性能。
In this paper, we focus on 1-bit precoding for large-scale antenna systems in the downlink based on the concept of constructive interference (CI). By formulating the optimization problem that aims to maximize the CI effect subject to the 1-bit constraint on the transmit signals, we mathematically prove that, when relaxing the 1-bit constraint, the majority of the obtained transmit signals already satisfy the 1-bit constraint. Based on this important observation, we propose a 1-bit precoding method via a partial branch-and-bound (P-BB) approach, where the BB procedure is only performed for the entries that do not comply with the 1-bit constraint. The proposed P-BB enables the use of the BB framework in large-scale antenna scenarios, which was not applicable due to its prohibitive complexity. Numerical results demonstrate a near-optimal error rate performance for the proposed 1-bit precoding algorithm.
