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Optimization of Transmitter and Receiver Filters for OQAM-OFDM Systems Using Nonlinear Programming
Hsiao-Hwa CHEN Xiao-Dong CAI
IEICE TRANSACTIONS on Communications
Publication Date: 1997/11/25
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Communication Theory
OFDM, multi-carrier modulation, nonlinear programming,
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This paper proposes a family of optimized transmitter and receiver FIR filters for orthogonal frequency division multiplex (OFDM) systems with offset QAM modulation using nonlinear-programming. Two objective functions in the frequency domain (considering both OFDM orthogonal condition and Nyquist condition), least square error (LSE) and minimizing maximal spectral side lobe (Mini-max), are used. The nonlinear programming is implemented with a modified sequential quadratic programming (SQP) algorithm, which guarantees a super-linear convergence. Resultant optimized FIR filters are given with their coefficients and spectra.