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- Title
Ramanujan periodic subspace division multiplexing.
- Authors
Srikanth, Goli; Chakka, Vijay Kumar; Shah, Shaik Basheeruddin
- Abstract
In this study, a new modulation method defined as Ramanujan periodic subspace division multiplexing (RPSDM) is proposed using Ramanujan subspaces. Each subspace contains an integer-valued Ramanujan sum and its circular downshifts as a basis. The proposed RPSDM decomposes the linear time-invariant wireless channels into a Toeplitz stair block diagonal matrices, whereas orthogonal frequency division multiplexing (OFDM) decompose the same into diagonal. Advantages of such structured subspaces representation are studied and compared with an OFDM representation in terms of a peak-average power ratio and bit error rate. Zero-forcing and minimum mean square error detectors are applied to evaluate the performance of OFDM and RPSDM techniques. Finally, the simulation results show that the proposed design (with an additional receiver complexity) outperforms OFDM under both detectors.
- Subjects
ORTHOGONAL frequency division multiplexing; MULTIPLEXING; SUBSPACES (Mathematics); WIRELESS channels; ERROR rates
- Publication
IET Communications (Wiley-Blackwell), 2019, Vol 13, Issue 15, p2296
- ISSN
1751-8628
- Publication type
Article
- DOI
10.1049/iet-com.2018.5828