MIMO technology not only offers diversity and capacity gains, but also provides higher spectral efficiency and significant link reliability over SISO systems. Many methods are developed to exploit the diversity offered by multi-antenna systems such as Alamouti code and spatial multiplexing that do not require transmitter-side channel status information (Tx-CSI). Other power allocation optimization techniques, also known as precoding, require a full or partial Tx-CSI. These techniques aim to transform the signal before transmission according to different criteria, among which the minimal Euclidean distance seems to be very effective and continues to interest the researchers. Given perfect channel state information at both sides of the communication, we propose in this paper a novel design of wireless transmission schemes that joint the minimal Euclidean distance precoder and error correction coding based on the non-binary low-density parity-check code (NB-LDPC), to finally determine a power allocation optimization solution that adapts a linear precoding block to an NB-LDPC encoded MIMO transmission. In this paper we use a quadrature amplitude modulation (QAM), over a Rayleigh fading channel with a maximum likelihood detection. Simulations results in term of bit error rate confirmed that NB-LDPC codes are particularly well suited to be jointly used with precoding schemes based on the maximization of the minimum Euclidean distance criterion.

中文翻译：

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使用 QAM 调制的具有 LDPC 编码的 MIMO 的 Max-Dmin 预编码器的每组和联合优化

MIMO 技术不仅提供多样性和容量增益，而且比 SISO 系统提供更高的频谱效率和显着的链路可靠性。开发了许多方法来利用多天线系统提供的分集，例如不需要发射机侧信道状态信息 (Tx-CSI) 的 Alamouti 码和空间复用。其他功率分配优化技术，也称为预编码，需要完整或部分 Tx-CSI。这些技术旨在根据不同的标准在传输前对信号进行转换，其中最小欧几里得距离似乎非常有效，并继续引起研究人员的兴趣。给定通信双方完美的信道状态信息，我们在本文中提出了一种新颖的无线传输方案设计，该方案结合了基于非二进制低密度奇偶校验码 (NB-LDPC) 的最小欧几里德距离预编码器和纠错编码，最终确定了功率分配优化解决方案使线性预编码块适应 NB-LDPC 编码的 MIMO 传输。在本文中，我们在具有最大似然检测的瑞利衰落信道上使用正交幅度调制 (QAM)。误码率方面的模拟结果证实，NB-LDPC 码特别适合与基于最小欧几里德距离准则最大化的预编码方案联合使用。最终确定将线性预编码块适配到NB-LDPC编码的MIMO传输的功率分配优化方案。在本文中，我们在具有最大似然检测的瑞利衰落信道上使用正交幅度调制 (QAM)。误码率方面的模拟结果证实，NB-LDPC 码特别适合与基于最小欧几里德距离准则最大化的预编码方案联合使用。最终确定将线性预编码块适配到 NB-LDPC 编码的 MIMO 传输的功率分配优化方案。在本文中，我们在具有最大似然检测的瑞利衰落信道上使用正交幅度调制 (QAM)。误码率方面的模拟结果证实，NB-LDPC 码特别适合与基于最小欧几里德距离准则最大化的预编码方案联合使用。