Abstract
Recently, the orthogonal frequency-division multiplexing (OFDM) system has become an appropriate technique to be applied on the physical layer in various requests, mainly in wireless communication standards, which is the reason to use OFDM within mobile wireless medical applications. The OFDM with cyclic prefix (CP) can compensate lacks for the time-invariant multi-path channel effects using a single tap equaliser. However, for mobile wireless communication, such as the use of OFDM in ambulances, the Doppler shift is expected, which produces a doubly dispersive communication channel where a complex equaliser is needed. This paper proposes a low-complexity band LDLH factorisation equaliser to be applied in mobile medical communication systems. Moreover, the discrete fractional Fourier transform (DFrFT) is used to improve the communication system's performance over the OFDM. The proposed low-complexity equaliser could improve the OFDM, and the DFrFT-orthogonal chirp-division multiplexing (DFrFT-OCDM) system's performance, as illustrated in the simulation results. This proves that the recommended system outperforms the standard benchmark system, which is an essential factor as it is to be applied within mobile medical systems.
Original language | English |
---|---|
Article number | 101173 |
Journal | Physical Communication |
Volume | 42 |
Early online date | 18 Jul 2020 |
DOIs | |
Publication status | Published - Oct 2020 |
Externally published | Yes |
Keywords
- Channel model
- Cyclic prefix
- Doppler shift
- Doubly dispersive channel
- Factorisation equaliser
ASJC Scopus subject areas
- Electrical and Electronic Engineering