DESIGN & IMPLEMENTATION OF RECONFIGURABLE FRONT END FOR MIMO-OFDM

• Published in: International journal of engineering science and technology Vol. 3; no. 2; p. 1159
• Main Authors: Veena, M B, Swamy, M N Shanmukha
• Format: Journal Article
• Language: English
• Published: 01.02.2011
• Subjects: Channels; Coders; Decoders; Design engineering; Encoders; Field programmable gate arrays; Floating point arithmetic; Matlab; Orthogonal Frequency Division Multiplexing
• ISSN: 0975-5462; 0975-5462

This paper focuses on design, implement and optimization of digital front end module of Multiple Input Multiple Output (MIMO)-Orthogonal Frequency Division Multiplexing (OFDM) system on FPGA employing Alamouti Technique (Space Time Block coding). MIMO-OFDM can very effectively be used to achieve higher data rate's and higher reliability and this is going to be the Key for 4G Technology. MIMO - OFDM designed in this work consists of Input/Output Memory, 16 QAM Modulator, MIMO Encoder (Space Time Encoder, Wireless Channel Model, MIMO Decoder Space Time Decoder) and 16 QAM Demodulator. This paper has resulted in the development of a hardware prototype of a MIMO Transmitter, Receiver and channel, which is implemented on a Spartan-3 FPGA board. As the number format adopted is floating point, there was a need to develop a separate function which will show the equivalent real numbers for the corresponding floating point number. This made the task of debugging a lot easier. Test benches for individual model were developed and tested it for its correct functionality. The functional simulation was carried out for the entire design. The entire design was mapped on to FPGA. The results were compared with the MATLAB results and were found to be the same.