2 research outputs found
Overlap Frequency Domain Equalization for Faster-than-Nyquist Signaling
This letter proposes the Faster-than-Nyquist signaling (FTNS) using overlap
frequency domain equalization (FDE), which compensates the inter-symbol
interference (ISI) due to band limiting filters of the FTNS at the transmitter
and the receiver as well as the frequency selective fading channel. Since
overlap FDE does not require any guard interval (GI) at the transmitter such as
cyclic prefix (CP), higher spectral efficiency can be achieved compared to FTNS
scheme using the conventional FDE. In the proposed method, the equalizer weight
is derived based on minimum mean square error (MMSE) criterion taking the
colored noise due to the receiving filter into consideration. Moreover, we also
give an approximated FDE weight in order to reduce the computational
complexity. The performance of the proposed scheme is demonstrated via computer
simulations
Frequency-domain equalization aided iterative detection of faster-than-Nyquist signaling with noise whitening
In this paper, we propose a serially concatenated turbo-encoded
faster-than-Nyquist signaling (FTNS) transceiver that takes into account
FTNS-specific colored noise effects. The proposed low-complexity receiver
carries out soft-decision frequency-domain equalization with the aid of the
minimum-mean square error criterion while whitening the colored noise.
Simulation results demonstrate that the proposed multi-stage-concatenated FTNS
system achieves a better error-ratio performance than previous systems that do
not consider colored noise effects in the high-symbol-packing FTNS regime.
Furthermore, as an explicit benefit of the proposed iterative decoder,
near-capacity performance is achieved with practical decoding complexity.Comment: 6 pages, 6 figures; IEEE International Conference on Communications
(ICC) 2016, Kuala Lumpur, Malaysi