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2010

A Novel Graph-Based Suboptimal Multiuser Detector for FDM-CPM Transmissions

9 years 5 months ago
A Novel Graph-Based Suboptimal Multiuser Detector for FDM-CPM Transmissions
We consider a frequency division multiplexed (FDM) system where each user employs a continuous phase modulation (CPM), serially concatenated with an outer code through an interleaver, and iterative detection/decoding. In such a system, the spectral efficiency can be increased by reducing the spacing between two adjacent channels, thus increasing the relevant interference. Hence, we address the design of lowcomplexity suboptimal multiuser detectors able to effectively cope with such an interference. We extend some well known multiuser detection algorithms proposed for code division multiple access (CDMA) systems. Moreover, we introduce a new detection scheme using the framework based on factor graphs (FGs) and the sum-product algorithm (SPA). The simulation results show that the described algorithms allow to effectively reduce the spacing, thus increasing the spectral efficiency, and in particular, the proposed detection scheme results to be the most effective one in terms of performanc...
Amina Piemontese, Giulio Colavolpe
Added 23 May 2011
Updated 23 May 2011
Type Journal
Year 2010
Where TWC
Authors Amina Piemontese, Giulio Colavolpe
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