Non-orthogonal multiple access （NOMA） has been recognized as a promising multiple access technique for the next generation cel-lular communication networks. In this paper, we first discuss a simple NOMA model with t...Non-orthogonal multiple access （NOMA） has been recognized as a promising multiple access technique for the next generation cel-lular communication networks. In this paper, we first discuss a simple NOMA model with two users served by a single-carrier si-multaneously to illustrate its basic principles. Then, a more general model with multicarrier serving an arbitrary number of users on each subcarrier is also discussed. An overview of existing works on performance analysis, resource allocation, and multiple-in-put multiple-output NOMA are summarized and discussed. Furthermore, we discuss the key features of NOMA and its potential re-search challenges.展开更多
可见光多输入多输出(MIMO)通信中空时分组编码能够获得较高的分集增益,但是其有效性较差,空间调制编码能够提高系统的频谱利用率但其可靠性较差。因此结合空时分组编码和空间调制编码的优势设计出空时分组-空间调制(STBC-SM)级联编码应...可见光多输入多输出(MIMO)通信中空时分组编码能够获得较高的分集增益,但是其有效性较差,空间调制编码能够提高系统的频谱利用率但其可靠性较差。因此结合空时分组编码和空间调制编码的优势设计出空时分组-空间调制(STBC-SM)级联编码应用到可见光MIMO通信系统中,根据朗伯光源衰减特性建立了可见光室内传输信道模型,并对系统有效性及可靠性进行了仿真验证。结果表明在确保原有效性和相同误码率前提下,STBC-SM级联编码的可靠性较SM提高了5～8 d B,在确保原可靠性的前提下,STBC-SM级联编码的有效性较STBC提高了。表明文中设计的级联编码可有效的解决通信系统中有效性与可靠性的矛盾问题,为研究室内可见光MIMO通信提供了很好的理论意义。展开更多
文摘Non-orthogonal multiple access （NOMA） has been recognized as a promising multiple access technique for the next generation cel-lular communication networks. In this paper, we first discuss a simple NOMA model with two users served by a single-carrier si-multaneously to illustrate its basic principles. Then, a more general model with multicarrier serving an arbitrary number of users on each subcarrier is also discussed. An overview of existing works on performance analysis, resource allocation, and multiple-in-put multiple-output NOMA are summarized and discussed. Furthermore, we discuss the key features of NOMA and its potential re-search challenges.
文摘可见光多输入多输出(MIMO)通信中空时分组编码能够获得较高的分集增益,但是其有效性较差,空间调制编码能够提高系统的频谱利用率但其可靠性较差。因此结合空时分组编码和空间调制编码的优势设计出空时分组-空间调制(STBC-SM)级联编码应用到可见光MIMO通信系统中,根据朗伯光源衰减特性建立了可见光室内传输信道模型,并对系统有效性及可靠性进行了仿真验证。结果表明在确保原有效性和相同误码率前提下,STBC-SM级联编码的可靠性较SM提高了5～8 d B,在确保原可靠性的前提下,STBC-SM级联编码的有效性较STBC提高了。表明文中设计的级联编码可有效的解决通信系统中有效性与可靠性的矛盾问题,为研究室内可见光MIMO通信提供了很好的理论意义。
