In recent years, the conventional degrees of freedom in frequency and time have been fully used. It is difficult to further improve the performance of communication systems with such degrees of freedom. Orbital angular momentum (OAM), which provides a new degree of freedom for millimeter-wave (mmWave) wireless communication systems, has been recognized as a key enabling technique for future mobile communication networks. By combining OAM beams that have theoretically infinite and mutually orthogonal states with the generalized spatial modulation (GSM) strategy, a new OAM-GSM mmWave wireless communication system is designed in this paper. A bit error rate (BER) model of the OAM-GSM system is established based on channel flip precoding. The channel capacity, energy efficiency, and BER of the proposed OAM-GSM mmWave wireless communication system are simulated. Numerical results show that, compared with traditional GSM systems, the OAM-GSM system has more complex transmission and reception mechanisms but the channel capacity and maximum achievable energy efficiency are increased by 80% and 54%, respectively, and the BER drops by 91.5%.

近年来，频率和时间的常规自由度已得到充分利用。很难以这种自由度进一步提高通信系统的性能。轨道角动量（OAM）为毫米波（mmWave）无线通信系统提供了新的自由度，已被公认为是未来移动通信网络的一项关键技术。通过将理论上具有无限和相互正交状态的OAM光束与广义空间调制（GSM）策略相结合，设计了一种新的OAM-GSM mmWave无线通信系统。基于信道翻转预编码，建立了OAM-GSM系统的误码率（BER）模型。通道容量，能效，对拟议的OAM-GSM mmWave无线通信系统的BER和BER进行了仿真。数值结果表明，与传统的GSM系统相比，OAM-GSM系统的发送和接收机制更加复杂，但是信道容量和最大可实现的能量效率分别提高了80％和54％，而BER下降了91.5％。 。