TY - JOUR JF - mdrsjrns JO - MJEE VL - 9 IS - 1 PY - 2009 Y1 - 2009/1/01 TI - Detection of the Number of Transmit Antenna and Modulation Type in MIMO Communication Systems with Space-Time Block Code TT - تشخیص تعداد آنتن‌های فرستنده و نوع مدولاسیون در سیستم مخابراتی MIMO با کد فضا - زمان بلوکی N2 - In this paper, in order to detect the number of transmitting antenna in MIMO communication systems, it is proposed that the techniques such as AIC & MDL, which have been primarily designed so as to detect the number of Gaussian sources, are applied. Then a hypothesis testing based method for recognizing the type of modulation in MIMO communication systems with block orthogonal codes is suggested; in which in order to reduce the complexity of the traditional methods, simpler likelihood functions for testing hypotheses are applied. Furthermore, because in all modulation scheme detection methods, a proper estimation of channel gain (channel matrix) is required; in this paper, a new and efficient method based on SAGE iterative algorithm for estimation of channel matrix in MIMO communication system with space-time block codes is proposed. At the end of this paper, the performance and effectiveness of all proposed modules are separately and jointly analyzed by numerical simulations. SP - 57 EP - 78 AU - عزمی, پائیز AU - عباسیان فریدونی, جابر AD - دانشگاه تربیت مدرس KW - Detection of The Number of Transmit Antenna KW - Modulation Recognition KW - MIMO Systems KW - Orthogonal Space-Time Block Codes KW - Channel Matrix Estimation KW - SAGE Algorithm UR - http://mjee.modares.ac.ir/article-17-4478-en.html ER -