An energy efficient covariance optimization scheme for distributed antenna systems in broadcast channel

作者：He, Chunlong^*; Chen, Wenliang; Zhang, Shiqi; Li, Xingquan

来源：AEU-International Journal of Electronics and Communications, 2016, 70(11): 1489-1495.

DOI：10.1016/j.aeue.2016.09.002

• Distributed antenna systems
• Energy efficiency
• Fractional programming
• Broadcast channel
• Covariance matrix

In this paper, we discuss energy efficient covariance optimization scheme for the downlink multiuser distributed antenna systems in broadcast channel (DAS-BC). The energy efficiency (EE) optimization problem for DAS-BC is a non-convex optimization problem. Therefore, according to the duality between multiple-input multiple-output (MIMO)-BC and MIMO-multi-access channel (MAC), we first transform the non-convex EE optimization problem to a convex optimization problem. Then exploiting the theory of fractional programming, we convert the EE optimization problem of DAS-BC in fractional form into an equivalent optimization problem in subtractive form. Next, an optimal energy efficient covariance matrix algorithm is developed to maximize EE in DAS-BC. Through computer simulation, we demonstrate that the performance of EE and SE (spectral efficiency) for DAS-BC are better than co-located antenna systems in broadcast channel (CAS -BC).

• 出版日期2016
• 单位深圳大学