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Oral Session B : Saturday, March 23, 2013 / 10:00 - 11:00

The links on the papers titles are desabled the PDF versions are in the USB drive given to the IP-WiS'2013 participants
14Iterative Multiuser Detection for Multi-beam Systems
Helmi Chaouech
Ridha Bouallegue


In this paper, multiuser detection techniques for multi-beam satellite communications are developed and evaluated. The proposed solutions are based on channel coding and interference suppression. Mitigation of co-channel interference (CCI) effects is processed by parallel interference cancellation (PIC) architectures. The channel coefficients are estimated iteratively, and, used to compensate the interference caused by the co-frequency signals of adjacent beams. Signals combining method, which is based on the spatial diversity due to reception antenna array, improves the signal to noise ratio (SNR), leading to better detection quality. Interleaving of the data symbols at the coding output avoids correlated transmissions, and thus, leads to better performance of the decoding algorithms. The multiuser detection solutions are evaluated through computer simulations where a synchronous multi-beam satellite uplink is considered under a high noisy and multiple communications scenario. The simulations results showed the robustness of the proposed solutions.

16Multi-Stage SIC_MPIC for uplink HSUPA multi-users receiver over multi-path channel
Bechir Nsiri
Mahmoud Ammar
Messaoud Eljamai


In HSUPA system, the accumulation of multiple access interference and multipath interference seriously degrades the performances of HSUPA system. Therefore it is necessary to design a receiver able to reproduce the signal by mitigating this interference. In this paper, we propose an efficient new detector for Multipath Interference Cancellation (SIC_MPIC). This detector which is a combination between two detectors: SIC (Successive Interference Cancellation) [10, 11] and MPIC (Multipath Interference Cancellation), allows us to achieve the multipath and multiple access interference. We evaluate the performance of SIC_MPIC and we compare this performance with performance of SIC_RAKE detector. The simulation results demonstrate that the performance of SIC_MPIC detector is better than the SIC_Rake detector.

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