Spatial and directional modulation with random frequency diverse array

Wei, Xing; Xiao, Yu; Xiao, Yao; You, Qidi; Chen, Wu

doi:10.1109/ccwc.2018.8301737

Cited by 4 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3is widely used in the communication systems. However, there are two problems in some studies: one is that the time-varying nature of the FDA has been ignored [7], [8], [17], so that the corresponding conclusions are only valid for a specific time interval, e.g., t = 0. The other is that time-modulated frequency or beamforming weights have to be used to obtain time-invariant performance [9], [13], [14], [18].…”

Section: The Baseband Model Of Fdamentioning

confidence: 99%

A Leakage-Based Directional Modulation Scheme for Frequency Diverse Array in Robot Swarm Networks

He²,

et al. 2020

IEEE Access

View full text Add to dashboard Cite

Robot swarms, which constitute typical multiuser systems, have played more and more important roles in many areas. In this paper, a directional modulation(DM) scheme for frequency diverse array(FDA) based on the leakage power minimization criterion is proposed, which can be used in a robot swarm system as well as other multiuser scenarios. Based on this scheme, location-dependent secure transmission can be obtained in the multiuser downlink channels under certain circumstances, where independent data streams can be sent to different legitimate users safely. Meanwhile, the difficulty for perfect eavesdropping is significantly increased compared with phased-array-based DM. We also use the block successive upper-bound minimization algorithm to optimize the frequency offsets of the array, and the algorithm can be effectively performed. This scheme utilizes the baseband model of the FDA, which is another contribution of this paper. It solves the problems brought by the time-varying nature of the FDA and reveals the distance-angle correlation of the FDA more fundamentally. Based on that, besides the proposed FDA-DM scheme, a novel multiple access technique, named as link division multiple access, is also preliminarily proposed. It allows the transmitter to distinguish multiple users in the same or proximal locations without the help of time division, frequency division, or code division. At last, numerical results are presented to verify the superiorities of LDMA and the proposed FDA-DM scheme.

show abstract