Optimization of Transmitter and Receiver Filters for OQAM-OFDM Systems Using Nonlinear Programming

Hsiao-Hwa CHEN  Xiao-Dong CAI  

IEICE TRANSACTIONS on Communications   Vol.E80-B   No.11   pp.1680-1687
Publication Date: 1997/11/25
Online ISSN: 
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.