Quadrature amplitude modulation-filter-bank multi-carrier (QAM-FBMC) technology, which utilizes a non-orthogonal pulse-shaping filter, has high spectral confinement characteristics and spectral efficiency, and it is considered as a candidate waveform to replace cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM). However, the QAM-FBMC system suffers from performance degradation due to the non-orthogonal filter no matter how well the prototype filter is designed. In this letter, we propose the interference-canceling algorithm for QAM-FBMC with an MMSE receive filter. The proposed algorithm effectively mitigates the performance degradation caused by the non-orthogonal filters of QAM-FBMC systems, and it closely achieves the performance of CP-OFDM system in moderate SNR region. Also, the proposed algorithm performs the symbol-wise detection, which allows practical implementation without system delay.

中文翻译：

---

用于 QAM-FBMC 系统的 MMSE 干扰消除接收机


正交幅度调制滤波器组多载波(QAM-FBMC)技术利用非正交脉冲整形滤波器，具有较高的频谱限制特性和频谱效率，被认为是替代循环前缀的候选波形。正交频分复用（CP-OFDM）。然而，无论原型滤波器设计得多么好，QAM-FBMC 系统都会因非正交滤波器而遭受性能下降。在这封信中，我们提出了带有 MMSE 接收滤波器的 QAM-FBMC 干扰消除算法。该算法有效缓解了QAM-FBMC系统非正交滤波器造成的性能下降，在中等SNR区域接近CP-OFDM系统的性能。此外，所提出的算法执行逐符号检测，这允许在没有系统延迟的情况下实际实现。