DSP Realization of MIMO-OFDM Transceiver and V-BLAST

• Main Authors: Po-Tien Lee, 李伯天
• Other Authors: Ta-Sung Lee
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/29199606750336298412

碩士 === 國立交通大學 === 電信工程系 === 91 === OFDM is a modulation scheme adopted by the IEEE Std. 802.11a , which provides high data rate, high spectral efficiency, and high resistance to multipath fading. These make it one of most popular transmission technologies. In this thesis, we will use Aptix® MP3C as a system development platform, which integrates DSP, USB, and FPGA modules, to realize the MIMO-OFDM spatial diversity and spatial multiplexing transceiver architecture. DSP provides high speed fixed-point and floating-point operations, flexible modification, and quick verification, which make it suitable for real-time signal processing. This thesis will focus on the DSP realization of channel estimator, phase tracking, space-time block decoder, V-BLAST, and convolutional decoder in the MIMO-OFDM system. In particular, the channel estimator and space-time block decoder can obtain a diversity gain from multiple antennas to improve their accuracy. The phase tracking can compensate for the residual frequency errors. The V-BLAST in the spatial multiplexing mode can achieve interference cancellation. Finally, The convolutional decoder can correct erroneous bits to enhance system performance. With the concept of software-defined radio incorporated, we use DSP as a development core, to easily switch between the diversity and multiplexing modes by parameter control of DSP programs.