Subcarrier group assignment for MC-CDMA wireless networks", EURASIP Journal on Wireless Communications and Networking.
Transmission Power Adaptations in MC-CDMA Communications over Rayleigh Fading Channels", IEEE transactions on Vehicular Technology, 56(6): 3486-3494.
Primarily the data are converted from serial to parallel and spread with the pseudo code of the user in order to obtain the Y(t) output of the MC-CDMA system with M users and N subcarriers for which the transmitter block is indicated in Fig.
In this case, the Y(t) output of an MC-CDMA system with N subcarrier and M users can be presented as indicated below.
The SCMA is a multi-dimensional codebook-based non-orthogonal spreading technique; it is a type of MC-CDMA
with a particular choice of a sparse code book facilitating low-complexity maximum likelihood (ML) detection.
Due to their special signal structure, MC-CDMA
signals will not experience significant linear distortion in fading channels where the symbol duration is much larger than the delay spread, which is a measure of the length of the impulse response of the channel.
Part III - details the advanced intricacies of adaptive versus space-time block- and trellis-coded OFDM and MC-CDMA
To mitigate the effect of ICI and to overcome the transmitter complexity of MC-CDMA
system, duobinary coded receiver phase rotated conjugate cancellation (RPRCC) with pilot based CFO estimation is proposed in this work.
Due to narrowband subcarriers used in MC-CDMA
systems, the communication quality is degraded by the Intercarrier Interference (ICI) in the presence of carrier frequency offset.
The PSO algorithm based MUD is proposed for MC-CDMA
system, which aims to equalize independent fading of all sub carriers and also compared with different MUDs.
To improve the performance of MC-CDMA
systems, multi-user detections (MUD) are applied.
In addition, the flexibility offered by the spread spectrum (SS) and time division multiplexing (TDM) techniques motivated many researchers to investigate several MC combined multiple access schemes, such as MC-CDMA
, OFDMA and MC-TDMA.