Shiwen He, Yongming Huang, Luxi Yang, Björn Ottersten
Energy efficiency optimization of wireless systems has become urgently important due to its impact on the global carbon footprint. In this paper we investigate energy efficient multicell multiuser precoding design and consider a new criterion of weighted sum energy efficiency, which is defined as th...
Shicong Liu, Zhen Gao, Yongpeng Wu, Derrick Wing Kwan Ng et al.
The rapid development of communication technologies in the past decades has provided immense vertical opportunities for individuals and enterprises. However, conventional terrestrial cellular networks have unfortunately neglected the huge geographical digital divide, since high bandwidth wireless co...
Kexin Li, Li You, Jiaheng Wang, Xiqi Gao et al.
This paper investigates the downlink (DL) transmit design for massive multiple-input multiple-output (MIMO) low-earth-orbit (LEO) satellite communication systems, where only the slow-varying statistical channel state information is exploited at the transmitter. The channel model for the DL massive M...
Wenzhe Fan, Yili Xia, Chunguo Li, Yongming Huang et al.
In wireless sensor networks, due to the bandwidth constraint, the distributed nodes (DNs) might only provide binary representatives of the source signal, and then transmit them to the central node (CN). In this paper, we consider the joint estimation of signal amplitude and background noise variance...
Wenjing Cao, Yafei Wang, Jinshuo Zhang, Xiaofan Xu et al.
This paper investigates new efficient transmission architectures for multi-satellite massive multiple-input multiple-output (MIMO). We study the weighted sum-rate maximization problem in a multi-satellite system where multiple satellites transmit independent data streams to multi-antenna user termin...
Jiaheng Wang, Mats Bengtsson, Björn Ottersten, Daniel P. Palomar
In this paper, we consider robust MIMO precoding designs against deterministic imperfect channel state information at the transmitter (CSIT). In contrast to the existing works based on one or two particular channel uncertainty models, we consider a general uncertainty set defined by a generic matrix...