Cache Aided Decode‐and‐Forward Relaying Networks: From the Spatial View

Abstract

We investigate cache technique from the spatial view and study its impact on the relaying networks. In particular, we consider a dual-hop relaying network, where decode-and-forward (DF) relays can assist the data transmission from the source to the destination. In addition to the traditional dual-hop relaying, we also consider the cache from the spatial view, where the source can prestore the data among the memories of the nodes around the destination. For the DF relaying networks without and with cache, we study the system performance by deriving the analytical expressions of outage probability and symbol error rate (SER). We also derive the asymptotic outage probability and SER in the high regime of transmit power, from which we find the system diversity order can be rapidly increased by using cache and the system performance can be significantly improved. Simulation and numerical results are demonstrated to verify the proposed studies and find that the system power resources can be efficiently saved by using cache technique.

Rotman lens-based two-tier hybrid beamforming for wideband mmWave MIMO-OFDM system with beam squint

“…It could collect the power leakage with much fewer RF chains than full-digital architecture. For future work, we attempt to extend our work in this paper with some other existing wireless techniques [49,50] and design hybrid precoder for the wideband mmWave system with cache techniques [6][7][8] to meet the uRLLC requirement in the 5G/B5G communication system.…”

“…The capacity of the fifth generation (5G) wireless communication system is projected to bring 1000× increase to meet the data explosion by 2020 [1][2][3][4][5]. To achieve the ultra-reliable and available low-latency communications (uRLLC) for 5G/Beyond-5G (B5G) wireless system, more bandwidth, more advanced signal processing technologies, and together with cache techniques [6][7][8], are needed to guarantee the reliable and highly effective transmission. Millimeter wave emerges as the new radio in 5G communications to leverage the bandwidth shortage.…”

Impact of Antenna Selection on Physical‐Layer Security of NOMA Networks

“…Specifically, the secrecy diversity order of the system is equal to the antenna number, when the interference from the second user is limited. In the future works, we will incorporate other wireless transmission techniques such as the works in [57][58][59][60][61], in order to further enhance the system performance and ensure the secure communications.…”

Multiuser precoding scheme and achievable rate analysis for massive MIMO system

“…Thus, the detailed parameter set about the correlated fading channels can be found in the works [46][47][48]. 2 For simplicity, we use superscript * replace the different precoding schemes, which shall be denotes the "MRT", "ZF" or "MMSE", respectively.…”