| Full text | |
| Author(s): |
Magalhaes Afonso, Rubens Junqueira
[1]
;
Harrop Galvao, Roberto Kawakami
[1]
;
Kienitz, Karl Heinz
[1]
;
Alyami, Hashem
[2]
;
Becerra, Victor M.
[2, 3]
;
Hadjiloucas, Sillas
[2]
Total Authors: 6
|
| Affiliation: | [1] Inst Tecnol Aeronaut, Div Engn Eletron, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[2] Univ Reading, Sch Syst Engn, Reading RG6 6AY, Berks - England
[3] Univ Portsmouth, Sch Engn, Anglesea Bldg, Anglesea Rd, Portsmouth PO1 3DJ, Hants - England
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | OPTICAL AND QUANTUM ELECTRONICS; v. 48, n. 7 JUL 2016. |
| Web of Science Citations: | 1 |
| Abstract | |
Multi-path propagation is modelled assuming a multi-layer RC network with randomly allocated resistors and capacitors to represent the transmission medium. Due to frequency-selective attenuation, the waveforms associated with each propagation path incur path-dependent distortion. A pre-equalization procedure that takes into account the capabilities of the transmission source as well as the transmission properties of the medium is developed. The problem is cast within a Mixed Integer Linear Programming optimization framework that uses the developed nominal RC network model, with the excitation waveform customized to optimize signal fidelity from the transmitter to the receiver. The objective is to match a Gaussian pulse input accounting for frequency regions where there would be pronounced fading. Simulations are carried out with different network realizations in order to evaluate the sensitivity of the solution with respect to changes in the transmission medium mimicking the multi-path propagation. The proposed approach is of relevance where equalization techniques are difficult to implement. Applications are discussed within the context of emergent communication modalities across the EM spectrum such as light percolation as well as emergent indoor communications assuming various modulation protocols or UWB schemes as well as within the context of space division multiplexing. (AU) | |
| FAPESP's process: | 11/13777-8 - Time domain terahertz spectroscopy: development of analytical methods, signal processing techniques, biochemical and fundamental studies |
| Grantee: | Celio Pasquini |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 11/17610-0 - Monitoring and control of dynamic systems subject to faults |
| Grantee: | Roberto Kawakami Harrop Galvão |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 11/18632-8 - Fault-tolerant Predictive Control with trajectory planning in the presence of obstacles |
| Grantee: | Rubens Junqueira Magalhães Afonso |
| Support Opportunities: | Scholarships in Brazil - Doctorate |