An Equalization Technique for 54 Mbps OFDM Systems(Communication Theory and Systems)(<Special Section>Applications and Implementations of Digital Signal Processing)
スポンサーリンク
概要
- 論文の詳細を見る
A time-domain equalization (TEQ) algorithm is presented to shorten the effective channel impulse response to increase the transmission efficiency of the 54 Mbps IEEE802.11a orthogonal frequency division multiplexing (OFDM) system. In solving the linear equation Aw = B for the optimum TEQ coefficients, A is shown to be Hermitian and positive definite. The LDL^T and LU decompositions are used to factorize A to reduce the computational complexity. Simulation results show high performance gains at a data rate of 54 Mbps with moderate orders of TEQ finite impulse response (FIR) filter. The design and implementation of the algorithm in field programmable gate array (FPGA) are also presented. The regularities among the elements of A are exploited to reduce hardware complexity. The LDL^T and LU decompositions are combined in hardware design to find the TEQ coefficients in less than 4μs. To compensate the effective channel impulse response, a radix-4 pipeline fast Fourier transform (FFT) is implemented in performing zero forcing equalization. The hardware implementation information is provided and simulation results are compared to mathematical values to verify the functionalities of the chips running at 54Mbps.
- 社団法人電子情報通信学会の論文
- 2004-03-01
著者
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Nguyen H
Department Of Electrical Engineering University Of Saskatchewan
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Nguyen Ha
Department Of Electrical & Computer Engineering University Of Saskatchewan
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YUAN Naihua
Department of Electrical Engineering, University of Saskatchewan
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DINH Anh
Department of Electrical Engineering, University of Saskatchewan
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Yuan Naihua
Department Of Electrical Engineering University Of Saskatchewan
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Dinh A
Department Of Electrical Engineering University Of Saskatchewan
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Dinh Anh
Department Of Electrical Engineering University Of Saskatchewan
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NGUYEN Ha
Department of Chemical Engineering, Tokyo University of Agriculture and Technology
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Dinh Anh
Department of Electrical and Computer Engineering, University of Saskatchewan
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