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Description
Today’s mobile user wants more reliable services with faster data speed. Multiple-Input Multiple-Output (MIMO) can help to achieve higher diversity of the communication system with high data rate. In today’s world, video streaming have become very important because of the application in augmented reality, 3D hologram and virtual reality. The aim of the thesis is to demonstrate MIMO and video streaming technology with a Software Defined Radio (SDR) testbed. This thesis is concerned with two main objectives: real-time video streaming with directional antennas and space-time coding with higher modulation schemes. In the first objective of the thesis, directional transmitter and receiver of higher modulation such as 128-QAM (Quadrature Amplitude Modulation) or 256-QAM signaling are designed in LabVIEW and implemented with software defined testbed with directional antennas. The impairments produced by the system like frequency offset, frequency drift, phase offset, In phase/Quadrature (I/Q) offset, modulation error ratio, IQ gain imbalance, magnitude error of peak, phase error of peak are measured. Furthermore, using higher modulation scheme live video is transfered from one Universal Software Defined Radio Peripheral (USRP) to another USRP with higher data rate and higher frame rate. In the second objective of the thesis, basic space–time coding is implemented with software defined radio testbed for obtaining higher diversity of the communication system. We are interested in finding the error rate of space-time coding with 16-QAM modulation scheme. We also analyze the performance of the received signals based on several metrics such as quadrature skew, IQ gain imbalance, modulation error ratio, phase offset, frequency drift, frequency offset, phase error in peak and magnitude error in peak before and after using space–time wireless coding with the 16–QAM modulation scheme. All the algorithms designed are implemented using the USRP SDR testbed with LabVIEW software.
