ZTE

ZTE Communications ›› 2013, Vol. 11 ›› Issue (4): 47-52.doi: DOI:10.3969/j.issn.1673-5188.2013.04.007

• Research Paper • Previous Articles     Next Articles

Cooperative Communication Protocols for Performance Improvement in Mobile Satellite Systems

Ashagrie Getnet Flattie   

  1. Engineering Department, Ethio Telecom, Addis Ababa, Ethiopia
  • Received:2013-10-11 Online:2013-12-25 Published:2013-12-25
  • About author:Ashagrie Getnet Flattie (edenashagrie@gmail.com) received his BSc degree in electrical engineering (specializing in communication technology) from Defense University, Debre Zeit, Ethiopia, in 2003. He received his MSc degree in electrical and computer engineering (majoring in communication engineering) from Addis Ababa University, Ethiopia, in 2008. In 2003, he was a lecturer in the Ethiopian Air Force and later worked at the Information Network Security Agency (INSA) of Ethiopia. Over the past six years, he has worked in telecommunications as a mobile planning and optimization manager and also a quality performance manager. Currently, he is an engineering RAN manager at Ethio-Telecom, Addis Ababa. His fields of interest include wireless communications. He has published six research papers in international conference proceedings and has been awarded best oral presenter at the International Conference on Wireless Networks (ICWN’12) in Thailand.

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Abstract: A mobile satellite indoor signal is proposed to model performance of cooperative communication protocols and maximal ratio combining. Cooperative diversity can improve the reliability of satellite system and increase data speed or expand cell radius by lessening the effects of fading. Performance is determined by measured bit error rates (BERs) in different types of cooperative protocols and indoor systems (e.g. GSM and WCDMA networks). The effect of performance on cooperative terminals located at different distances from an indoor cellular system is also discussed. The proposed schemes provide higher signal-tonoise ratio (SNR)—around 1.6 dB and 2.6 dB gap at BER 10-2 for amplify-and-forward (AF) and decode-and-forward (DF) cooperative protocols, respectively, when the cooperative terminal is located 10 m from the WCDMA indoor system. Cooperative protocols improve effective power utilization and, hence, improve performance and cell coverage of the mobile satellite network.

Key words: cooperative communication, amplify-and-forward, mobile satellite system, signal-to-noise ratio, maximal ratio combining