Media-based modulation (MBM) is a novel modulation technique that can improve the spectral efficiency of the existing wireless systems. In MBM, multiple radio frequency (RF) mirrors are placed near the transmit antenna(s) and are switched ON/OFF to create different channel fade realizations. In such systems, additional information is conveyed through the ON/OFF status of RF mirrors along with conventional modulation symbols. A challenging task at the receiver is to detect the transmitted information symbols and extract the additional information from the channel fade realization used for transmission. In this paper, we consider a massive MIMO (mMIMO) system where each user relies on MBM for transmitting information to the base station, and investigate the problem of symbol detection at the base station. First, we propose a mirror activation pattern (MAP) selection based modified iterative sequential detection algorithm. With the proposed algorithm, the most favorable MAP is selected, followed by the detection of symbol corresponding to the selected MAP. Each solution is subjected to the reliability check before getting the update. Next, we introduce a K favorable MAP search based iterative interference cancellation (KMAP-IIC) algorithm. In particular, a selection rule is introduced in KMAP-IIC for deciding the set of favorable MAPs over which iterative interference cancellation is performed, followed by a greedy update scheme for detecting the MBM symbols corresponding to each user. Simulation results show that the proposed detection algorithms exhibit superior performance-complexity trade-off over the existing detection techniques in MBM-mMIMO systems.

基于媒体的调制（MBM）是一种新颖的调制技术，可以提高现有无线系统的频谱效率。在MBM中，多个射频（RF）反射镜被放置在发射天线附近，并被打开/关闭以创建不同的信道衰落实现。在这样的系统中，附加信息通过射频反射镜的开/关状态与常规调制符号一起传送。接收机的一项艰巨任务是检测所传输的信息符号并从用于传输的信道衰落实现中提取附加信息。在本文中，我们考虑了一个大型MIMO（mMIMO）系统，其中每个用户都依赖MBM向基站传输信息，并研究基站的符号检测问题。第一，我们提出了一种基于镜像激活模式（MAP）选择的改进的迭代顺序检测算法。利用所提出的算法，选择最有利的MAP，然后检测与所选MAP相对应的符号。在获得更新之前，每个解决方案都要经过可靠性检查。接下来，我们介绍一个基于K有利MAP搜索的迭代干扰消除（KMAP-IIC）算法。特别地，在KMAP-IIC中引入了选择规则，用于确定在其上执行迭代干扰消除的一组有利的MAP，随后是用于检测与每个用户相对应的MBM符号的贪婪更新方案。仿真结果表明，与MBM-mMIMO系统中的现有检测技术相比，所提出的检测算法具有更好的性能-复杂度折衷。