Interference alignment(IA) is one of the promising measures for the multi-user network to manage interference. The rank constraints rank minimization means that interference spans the lowest dimensional subspace and t...Interference alignment(IA) is one of the promising measures for the multi-user network to manage interference. The rank constraints rank minimization means that interference spans the lowest dimensional subspace and the useful signal spans all available spatial dimensions. In order to improve the performance of two-way relay network, we can use rank constrained rank minimization(RCRM) to solve the IA problem. This paper proposes left reweighted nuclear norm minimization-γalgorithm and selective coupling reweighted nuclear norm minimization algorithm to implement interference alignment in two-way relay networks. The left reweighted nuclear norm minimization-γ algorithm is based on reweighted nuclear norm minimization algorithm and has a novel γ choosing rule. The selective coupling reweighted nuclear norm minimization algorithm weighting methods choose according to singular value of interference matrixes. Simulation results show that the proposed algorithms considerably improve the sum rate performance and achieve the higher average achievable multiplexing gain in two-way relay interference networks.展开更多
Since the rise of the Internet in China,China’s local governments have actively used Internet technology to facilitate public administration and public services.What impact,then,have different types of social media h...Since the rise of the Internet in China,China’s local governments have actively used Internet technology to facilitate public administration and public services.What impact,then,have different types of social media had on local governance?This paper,based on years of investigation of J Town and L Sub-district in Shanghai(2012-2018),finds that Internet technology has profoundly transformed the grassroots power structure.Before the rise of the Internet,the grassroots power structure included local government,activists and the masses;in the age of Weibo and home owners forums,grassroots opinion leaders rose,becoming an impressive social force that local government could not afford to ignore;in the age of WeChat,however,the influence of grassroots opinion leaders declined,as local government can interact directly with the masses through WeChat public accounts and WeChat group chats,with the network technology becoming a tool for micromanagement.These three stages correspond to three types of government characterized by limited mobilization,consultation,and user-friendliness,respectively.展开更多
基金supported by the National Science Foundation of China (NO.61271240, 61671253)
文摘Interference alignment(IA) is one of the promising measures for the multi-user network to manage interference. The rank constraints rank minimization means that interference spans the lowest dimensional subspace and the useful signal spans all available spatial dimensions. In order to improve the performance of two-way relay network, we can use rank constrained rank minimization(RCRM) to solve the IA problem. This paper proposes left reweighted nuclear norm minimization-γalgorithm and selective coupling reweighted nuclear norm minimization algorithm to implement interference alignment in two-way relay networks. The left reweighted nuclear norm minimization-γ algorithm is based on reweighted nuclear norm minimization algorithm and has a novel γ choosing rule. The selective coupling reweighted nuclear norm minimization algorithm weighting methods choose according to singular value of interference matrixes. Simulation results show that the proposed algorithms considerably improve the sum rate performance and achieve the higher average achievable multiplexing gain in two-way relay interference networks.
基金supported by a grant from the fourth set of the Elite Youth Talent Subprogram of the National Ten Thousand Talents Program
文摘Since the rise of the Internet in China,China’s local governments have actively used Internet technology to facilitate public administration and public services.What impact,then,have different types of social media had on local governance?This paper,based on years of investigation of J Town and L Sub-district in Shanghai(2012-2018),finds that Internet technology has profoundly transformed the grassroots power structure.Before the rise of the Internet,the grassroots power structure included local government,activists and the masses;in the age of Weibo and home owners forums,grassroots opinion leaders rose,becoming an impressive social force that local government could not afford to ignore;in the age of WeChat,however,the influence of grassroots opinion leaders declined,as local government can interact directly with the masses through WeChat public accounts and WeChat group chats,with the network technology becoming a tool for micromanagement.These three stages correspond to three types of government characterized by limited mobilization,consultation,and user-friendliness,respectively.
