This study proposes the construction of a transmit signal for large-scale antenna systems with cost-effective 1-bit digital-to-analog converters in the downlink. Under quadrature-amplitude-modulation constellations, it is still an open problem to overcome a severe error floor problem caused by its nature property. To this end, we first present a feasibility condition which guarantees that each user's noiseless signal is placed in the desired decision region. For robustness to additive noise, we formulate an optimization problem, we then transform the feasibility conditions to cascaded matrix form. We propose a low-complexity algorithm to generate a 1-bit transmit signal based on the proposed optimization problem formulated as a well-defined mixed-integer-linear-programming. Numerical results validate the superiority of the proposed method in terms of detection performance and computational complexity.

翻译：本研究提议为大型天线系统建造一个信号传输装置,在下行链路中安装具有成本效益的1位数字转换器到模拟转换器。在四光速调节星座下,它仍然是克服由自然属性造成的严重差错地面问题的一个未决问题。为此,我们首先提出一个可行性条件,保证每个用户无噪音信号都放置在理想的决策区域。为了对添加噪声的稳健性,我们提出优化问题,然后将可行性条件转换为级联矩阵格式。我们提议采用低兼容性算法,根据拟议的优化问题形成1位信号,将其作为一个定义明确的混合内线-线-线-线-方案。数字结果验证了拟议方法在检测性能和计算复杂性方面的优势。