This paper provides a new insight on system performance comparison with Amplify and Forward relaying protocol, STBC and Spatial multiplexing schemes, four channel equalization techniques (ZF, MMSE, ZF-SIC and MMSE-SIC) and four digital modulation schemes (BPSK, QPSK, 16PSK and 64PSK). | International Journal of Computer Networks and Communications Security C , , DECEMBER 2013, 292–298 Available online at: ISSN 2308-9830 N C S Encrypted Color Image Transmission in an Amplify and Forward Relaying Based STBC Encoded Cooperative MIMO OFDM System K. J. A. CHISTY1, S. M. A. ISLAM2, S. E. ULLAH3, S. R. SABUJ4 1, 2 Department of Physics, Jahangirnagar University 3 Department of APEE, University of Rajshahi 4 Department of EEE, Bangladesh University E-mail: 1kja_chisty@, 2azharphyd@, 3enayet67@, 4saifuriict@ ABSTRACT The present paper emphasizes greatly on the development of a simulation model for the single relaying based cooperative MIMO OFDM wireless communication system This paper provides a new insight on system performance comparison with Amplify and Forward relaying protocol, STBC and Spatial multiplexing schemes, four channel equalization techniques (ZF, MMSE, ZF-SIC and MMSE-SIC) and four digital modulation schemes (BPSK, QPSK, 16PSK and 64PSK). From simulation results for encrypted color image transmission, it is observable that the STBC encoded MIMO-OFDM system with Amplify and Forward relaying protocol, BPSK digital modulation and MMSE-SIC channel equalization technique provides an encouraging and quite acceptable system performance. Keywords: Cooperative communication, Orthogonal frequency division multiplexing, Amplify and forward, Minimum mean square error and Zero forcing. 1 INTRODUCTION The increasing demands for providing wireless multimedia and interactive high speed internet services are fuelling intensive research efforts to materialize the vision of future/next generation Internet Protocol (IP)-based heterogeneous multiantenna supported robust networks (Relaying and Cooperative transmission technology) based LTEadvanced/ Multiple antenna supported OFDM and its siblings. Now a days, the people are using their personal wireless enabled devices such as cell phones,
