论文标题
量化恒定包膜传输的多样性顺序分析
Diversity Order Analysis for Quantized Constant Envelope Transmission
论文作者
论文摘要
量化恒定信封（QCE）传输是一种流行而有效的技术，可降低硬件成本并提高5G和超越配备大型天线阵列的系统的功率效率。已经广泛观察到，量化水平的数量对系统性能有重大影响。本文旨在量化量化水平数量对系统性能的影响。具体而言，我们考虑了一个下行链路单用户多输入单输出（MISO）系统，该系统在瑞利褪色通道下具有M相移键（PSK）星座。我们首先在系统符号误差概率（SEP）上得出一个新颖的绑定。基于派生的SEP结合，我们表征了量化匹配过滤器（MF）预编码策略的可实现多样性顺序。我们的结果表明，当量化水平l的数量大于psk星座序m，即l> m时，可以达到完全的多样性顺序，当L = m时，只能达到一半多样性顺序，而可实现的多样性顺序为0时，当l <m时。仿真结果验证了我们的理论分析。
Quantized constant envelope (QCE) transmission is a popular and effective technique to reduce the hardware cost and improve the power efficiency of 5G and beyond systems equipped with large antenna arrays. It has been widely observed that the number of quantization levels has a substantial impact on the system performance. This paper aims to quantify the impact of the number of quantization levels on the system performance. Specifically, we consider a downlink single-user multiple-input-single-output (MISO) system with M-phase shift keying (PSK) constellation under the Rayleigh fading channel. We first derive a novel bound on the system symbol error probability (SEP). Based on the derived SEP bound, we characterize the achievable diversity order of the quantized matched filter (MF) precoding strategy. Our results show that full diversity order can be achieved when the number of quantization levels L is greater than the PSK constellation order M, i.e., L>M, only half diversity order is achievable when L=M, and the achievable diversity order is 0 when L<M. Simulation results verify our theoretical analysis.
