In a previous work, we introduced a spectrum sharing technique called Multi-User Vandermonde-subspace Frequency Division Multiplexing (MU-VFDM). This overlay technique allows the coexistence of a downlink Orthogonal Frequency Division Multiple Access (OFDMA) macro-cell and a cognitive multi-user small-cell system. In that work, MU-VFDM was shown to be able to completely cancel the interference ...

—In this paper, we investigate the robust transceiver design for Multi-Input Multi-Output (MIMO) Interference Channel (IC) networks with imperfect Channel State Information (CSI). With the assumption of Gaussian CSI uncertainty, a probabilistic constraint robust transceiver design problem is formulated by maximizing the average received signal while constraining the probability of large interf...

Adaptive modulation requires channel state information (CSI) at both transmitter and receiver. In practice, CSI can be acquired at the receiver by inserting pilot symbols in the transmitted signal. In this paper, we first analyze the effect channel estimation and prediction errors have on bit error rate (BER). Based on this analysis, we develop adaptive pilot symbol assisted modulation (PSAM) s...

In this paper, unequal error protection (UEP) adaptive multiple-input multiple-output (MIMO) system using orthogonal frequency division multiplexing (OFDM) is considered. Our proposed transmission scheme consists of three stages. The inner stage is a UEP adaptive loading, which is introduced to fulfill a certain UEP profile by distributing bits and power across the unitarily transformed eigenbe...

In this article, we investigate the performance of multiuser transmitter preprocessing (MUTP)-aided multiple-input multiple-output (MIMO) systems in a multi-cell multiuser setting where co-channel interference (CCI) is the major channel impairment, for both uplink (UL) and downlink (DL) transmissions. CCI can considerably reduce data rates resulting in outages in cellular systems, particularly ...

Wireless communication links with multiple antennas at both the transmitter and the receiver sides, so-called multiple-input-multiple-output (MIMO) systems, are attracting much interest since they can significantly increase the capacity of band-limited wireless channels to meet the requirements of the future high data rate wireless communications. The treatment of channel state information (CSI...

In this letter, we investigate a reconfigurable intelligent surfaces (RIS)-aided device to (D2D) communication system over Rician fading channels with imperfect hardware including both impairment at the transceivers and phase noise RISs. This letter has optimized shift by genetic algorithm (GA) method maximize achievable rate for continuous shifts (CPSs) discrete (DPSs). We also consider two sp...