研究目的
Exploring the flexibility of generalized frequency division multiplexing (GFDM) for achieving the same performance as filter bank multicarrier (FBMC) in terms of spectral containment and evaluating its performance under various channel models.
研究成果
The paper demonstrates that GFDM's flexibility can be exploited to achieve FBMC's performance in spectral containment through a modification in the GFDM structure. The Linear GFDM waveform shows identical performance to FBMC in tested scenarios, offering a configurable software-defined waveform for 5G radio access networks.
研究不足
The longer prototype filter required for linear filtering may increase latency and lead to poor performance in fast time-varying channels due to estimation errors.
1：Experimental Design and Method Selection:
The study modifies the GFDM transmission scheme to achieve linear filtering behavior similar to FBMC. It evaluates the performance through BER estimation under three channel models and measures spectral containment via power spectral density and PAPR via CCDF.
2：Sample Selection and Data Sources:
The simulation uses MATLAB for numerical simulations with parameters including 16-QAM mapping, PHYDYAS prototype filter, 128 subcarriers, and 4 subsymbols for Linear GFDM and FBMC-OQAM.
3：List of Experimental Equipment and Materials:
MATLAB software for simulations.
4：Experimental Procedures and Operational Workflow:
The study compares Linear GFDM, FBMC-OQAM, and OFDM under AWGN, time-invariant frequency-selective, and time-variant frequency-selective channels. It estimates BER, PSD, and PAPR CCDF.
5：Data Analysis Methods:
The performance is evaluated through BER comparison, PSD estimation via Welch method, and PAPR CCDF estimation.
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