The ultra-dense network (UDN) has been considered as a promising candidate for future 5G
networks to meet the explosive data demand. To realize UDN, a reliable, gigahertz …

To fully utilize the spatial multiplexing gains or array gains of massive MIMO, the channel
state information must be obtained at the transmitter side (CSIT). However, conventional …

Recently there has been much interest in systems capable of full duplex communications
operating with a common RF carrier frequency in both the transmit and receive channels. All …

The 6th Generation (6G) radio access technology is expected to support extreme
communication requirements in terms of throughput, latency and reliability, which can only …

The continuous proliferation of applications requiring wireless connectivity will eventually
result in latency and reliability requirements beyond what is achievable with current …

This textbook provides a comprehensive review of the evolution of mobile communications
and networking from the birth of cellular networks to the forthcoming sixth-generation mobile …

We propose a novel method for massive multiple-input multiple-output (massive MIMO) in
frequency division duplexing (FDD) systems. Due to the large frequency separation between …

Frequency division duplex (FDD) systems dominate current cellular networks due to its
advantages of low latency and strong anti-interference ability. However, the computation …

Scheduling amounts to allocating optimally channel, rate and power resources to multiple
connections with diverse quality-of-service (QoS) requirements. It constitutes a throughput …

In this paper, we investigate a downlink transmission algorithm for single-cell multiuser
systems with two-dimensional (2-D) large-scale antenna array at the base station (BS) over …