Geometric Sequence Decomposition With k-Simplexes Transform
- Authors
- Lee, Woong-Hee; Lee, Jong-Ho; Sung, Ki Won
- Issue Date
- Jan-2021
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Geometric sequence decomposition; k-simplexes transform; non-orthogonal interference-free radio access
- Citation
- IEEE TRANSACTIONS ON COMMUNICATIONS, v.69, no.1, pp.94 - 107
- Journal Title
- IEEE TRANSACTIONS ON COMMUNICATIONS
- Volume
- 69
- Number
- 1
- Start Page
- 94
- End Page
- 107
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/40385
- DOI
- 10.1109/TCOMM.2020.3028876
- ISSN
- 0090-6778
- Abstract
- This paper presents a computationally efficient technique for decomposing non-orthogonally superposed k geometric sequences. The method, which is named as geometric sequence decomposition with k-simplexes transform (GSD-ST), is based on the concept of transforming an observed sequence to multiple k-simplexes in a virtual k-dimensional space and correlating the volumes of the transformed simplexes. Hence, GSD-ST turns the problem of decomposing k geometric sequences into one of solving a k-th order polynomial equation. Our technique has significance for wireless communications because sampled points of a radio wave comprise a geometric sequence. This implies that GSD-ST is capable of demodulating randomly combined radio waves, thereby eliminating the effect of interference. To exemplify the potential of GSD-ST, we propose a new radio access scheme, namely non-orthogonal interference-free radio access (No-INFRA). Herein, GSD-ST enables the collision-free reception of uncoordinated access requests. Numerical results show that No-INFRA effectively resolves the colliding access requests when the interference is dominant.
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