Transmit diversity schemes for filter bank multicarrier (FBMC) are known to be challenging. No existing schemes have considered the presence of inter-antenna frequency offset (IAFO), which will result in performance degradation. In this letter, a new transmit scheme based on the frequency reversal Alamouti code (FRAC)-based structure to address the issue of IAFO is proposed and is proven to inherently cancel the inter-antenna inter-carrier interference (ICI) while preserving spatial diversity. Moreover, the proposed FRAC structure is applicable in frequency-selective channels. Numerical results show that the proposed scheme undergoes negligible bit error rate (BER) degradation even with considerable IAFOs.
翻译:众所周知,过滤银行多载体(FBMC)的传输多样性计划具有挑战性,没有现行计划考虑过存在联苯频率抵消(IAFO),这将导致性能退化;在本信内,提出了基于频率逆转的Alamouti代码(FRAC)结构的新传输计划,以解决IAFO问题,并证明该计划在维护空间多样性的同时,必然取消了联苯公司间干扰(ICI);此外,拟议的FRAC结构适用于频率选择渠道;数字结果显示,拟议的计划即使有大量IAFO,也会发生微不足道的位误差率(BER)。