Supplementary Index Bit Aided Transmit Diversity Scheme for Enhanced DCT-OFDM With Index Modulation

Adaptive Bit Loading and Transmit Diversity for Iterative OFDM Receivers

In this paper, we consider a transmission system employing orthogonal frequency division multiplexing (OFDM) with bit-interleaved coded modulation and perfect channel state information at both transmitter and receiver. An adaptive bit loading scheme in combination with cyclic delay diversity and discontinuous Doppler diversity is proposed at the transmitter and iterative demapping and decoding ...

Transmit diversity methods for OFDM

Performance of Multiple-Input Multiple-Output OFDM with Index Modulation

Multiple-input multiple output orthogonal frequency division multiplexing with index modulation (MIMO-OFDMIM) is novel multicarrier transmission technique which has been proposed recently as an alternative to classical MIMO-OFDM. In this scheme, OFDM with index modulation (OFDM-IM) concept is combined with MIMO transmission to take advantage of the benefits of these two techniques. In this work...

Adaptive OFDM Index Modulation for Two-Hop Relay-Assisted Networks

In this paper, we propose an adaptive orthogonal frequency-division multiplexing (OFDM) index modulation (IM) scheme for two-hop relay networks. In contrast to the traditional OFDM IM scheme with a deterministic and fixed mapping scheme, in this proposed adaptive OFDM IM scheme, the mapping schemes between a bit stream and indices of active subcarriers for the first and second hops are adaptive...

Efficient channel estimation for OFDM modulations with transmit diversity

This paper considers the use of implicit pilots for channel estimation in OFDM schemes (Orthogonal Frequency Division Multiplexing) with transmit diversity. To cope with the interference levels between data and pilots, we propose an iterative receiver with joint detection and channel estimation. For the first iteration, the channels are estimated by averaging the received signal over several bl...