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- Title
Achieving upper mutual information bound precoding for V-OFDM with MMSE receiver.
- Authors
Weiliang Han; Jianhua Ge; Fengchen Ouyang; Chensi Zhang; Fengkui Gong
- Abstract
Traditional vector orthogonal frequency division multiplexing (V-OFDM) can obtain both multi-path diversity and outage gain by transforming an inter-symbol interference (ISI) channel into multiple 'ISI-free' channel vectors. To achieve full multi-path diversity and acquire better outage performance, a low-complexity precoding scheme combined with simple minimum mean square error (MMSE) equalisation for V-OFDM system is proposed in this study. First, the upper mutual information bound of the V-OFDM system is derived with channel state information at transmitter. Based on the upper bound, an optimal precoding scheme for V-OFDM is presented. Meanwhile, the closed-form and asymptotic expressions on outage probability of the proposed scheme are derived. Simulations show that this low-complexity scheme can achieve full multi-path diversity and result in lower outage probability than the traditional V-OFDM scheme. Besides, the proposed scheme in ISI fading channel is capable of approaching the upper bound with <0.1 bits/s/Hz performance gap and improving average channel capacity with 2 bits/s/Hz over the traditional V-OFDM scheme.
- Subjects
INTERSYMBOL interference; RADIOS; ORTHOGONAL frequency division multiplexing; COMPUTATIONAL complexity; COMPUTER simulation
- Publication
IET Communications (Wiley-Blackwell), 2017, Vol 11, Issue 2, p198
- ISSN
1751-8628
- Publication type
Article
- DOI
10.1049/iet-com.2016.0273