OFDM based adaptive beamforming for hybrid terrestrial-satellite mobile system with pilot reallocation

• Published in: 2009 International Workshop on Satellite and Space Communications pp. 201 - 205
• Main Authors: Khan, A.H., Imran, M.A., Evans, B.G.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-09-2009
• Subjects: Array signal processing; Channel estimation; Communication networks; Hybrid power systems; Multiaccess communication; OFDM; Radiofrequency interference; Satellite broadcasting; Throughput; Transmitters
• ISBN: 9781424443840; 1424443849
• DOI: 10.1109/IWSSC.2009.5286394

Next generation networks will have to provide global connectivity to ensure success. Both satellite and terrestrial networks cannot guarantee this on their own. This incapability is attributed to capacity coverage issues in densely populated areas for satellites and lack of infrastructure in rural areas for terrestrial networks. Therefore, we consider a hybrid terrestrial-satellite mobile system based on frequency reuse. However, this frequency reuse introduces severe co-channel interference (CCI) at the satellite end. To mitigate CCI, we propose an OFDM based adaptive beamformer implemented on-board the satellite with pilot reallocation at the transmitter side. Results show that the proposed scheme outperforms the conventional approach.