Time Precoding Enabled Non-Orthogonal Frequency Division Multiplexing
Ozan, Waseem; Haigh, Paul Anthony; Tan, Bo; Darwazeh, Izzat (2019-09)
Ozan, Waseem
Haigh, Paul Anthony
Tan, Bo
Darwazeh, Izzat
IEEE
09 / 2019
2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202002242320
https://urn.fi/URN:NBN:fi:tuni-202002242320
Kuvaus
Peer reviewed
Tiivistelmä
In this paper, we propose a time precoding scheme for cancelling inter-carrier interference in non-orthogonal frequency division multiplexing for the first time. Achieving high spectral efficiencies is a recurring and key challenge in wireless communications systems and researchers generally use high order and advanced modulation formats to approach this problem, in particular, non-orthogonal modulation formats are a topic of particular interest. Fast orthogonal frequency division multiplexing (F-OFDM) doubles the throughput of conventional OFDM by violating orthogonality of the quadrature carrier, causing interference in the real and imaginary domains. Here, we propose a precoding scheme that enables self-interference cancellation without the need of the interference level calculation. The proposed scheme is implemented in the context of a narrowband internet-of-things (NB-IoT) system and verified on a software define radio (SDR) testbed with realistic AWGN and multiple path channels from channel emulator for concept proving. By comparing with the standard OFDM transmission, the time precoded F-OFDM outperforms around 3dB by BER with same signal-to-ratio (SNR) level.
Kokoelmat
- TUNICRIS-julkaisut [17063]