OFDM for digital TV broadcasting
Signal Processing
Applications of neural networks to digital communications: a survey
Signal Processing - Special issue on emerging techniques for communication terminals
Blind Channel Equalization and Identification
Blind Channel Equalization and Identification
Applied Neural Networks for Signal Processing
Applied Neural Networks for Signal Processing
IEEE Communications Magazine
Spreading codes for direct sequence CDMA and wideband CDMA cellular networks
IEEE Communications Magazine
Satellite-based Internet: a tutorial
IEEE Communications Magazine
RBF multiuser detector with channel estimation capability in a synchronous MC-CDMA system
IEEE Transactions on Neural Networks
A Joint MAC-PHY Approach for Medium Access Control in VBR MC-CDMA Broadband Indoor Connections
Wireless Personal Communications: An International Journal
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For a few years, multicarrier modulations have been proposed as valuable alternatives with respect to state-of-the-art single carrier ones due to their resilience against interference and channel distortion effects. In particular, many studies are arising about multicarrier-CDMA (MC-CDMA) techniques that provide improved robustness and flexibility with respect to single-carrier spread-spectrum techniques. Satellite communications considered the employment of MC-CDMA for multimedia transmission very recently, especially for what concerns the delivery of variable-bit-rate services over low-earth-orbit (LEO) satellite networks. To this aim, the problems to be faced are mainly related to the development of efficient methodologies for satellite channel estimation, equalization and multi-user detection, in order to exploit in an optimal way the natural diversity inherent to MC-CDMA. In this paper we compare two different neural-network-based approaches for efficient reception of MC-CDMA signals in the case of asynchronous, multi-user, and variable-bit-rate transmission over LEO satellite channels. The first approach introduces neural networks for supporting receiver decision. The second more sophisticated approach exploits neural networks for joint channel estimation and symbol detection. Simulation results will be presented that demonstrate the improved effectiveness of the proposed methodologies, with respect to state-of-the-art MC-CDMA detection techniques, both in terms of reduced BER and in terms of low computational complexity.