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Ofdm thesis 2004

The KUAR is an experimental software-defined radio platform that is intended for research in frequency-agile and cognitive radios. OFDM is a pertinent modulation technique for frequency-agile and cognitive radios, in that it can facilitate the ability to perform dynamic spectrum access communications over a wide transmission bandwidth without interfering with incumbent license holders. This thesis contributes an actual implementation of the basic components required for an OFDM system. Timing and frequency synchronization, channel estimation, and pilot carrier phase tracking are mandatory components of a packet-based OFDM system and pose the most significant implementation challenge. The VHDL modules provide a proof of concept and a framework unto which more sophisticated. Documents: Advanced Search Include Citations.

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Performance of OFDM and wavelet-packet based multicarrier communication

Masters thesis, Concordia University. It is known that the orthogonal frequency division multiplexing OFDM modulation is very suitable for high-speed wireless transmission systems due to its bandwidth efficiency and ability in coping with multipath fading. In the first part of the thesis, we investigate the peak windowing method, the clipping method, and a combination of the two techniques with an emphasis on the performance assessment of the transmitted OFDM signal using the combination scheme. We start with the review of the two typical signal distortion techniques and point out their advantages and shortcomings.

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Updated 14 Nov Also the guard interval GI is inserted. Sokthai Chan Retrieved April 30,
Masters thesis, Concordia University. The system includes a synchronization circuitry used for packet detection and time synchronization. The design flow starts with floating-point modeling with parameters specified by IEEE After algorithmic exploration and performance simulations, the fixed-point refinement is verified to compromise between sufficient arithmetic precision and high-speed hardware necessary for real-time communication systems.

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