CAJ | 학술논문

基于 SC-FDE(单载波频域均衡)和 OFDM(正交频分复用)的60 GHz 通信系统,对联合信道估计的 IQ 不平衡补偿算法进行了研究。通过最小化 CRE(信道残余能量),在未知 IQ 不平衡参数时可得 CIR(信道冲击响应)的最优解。一旦得到 IQ不平衡参数,CIR 的估计可以通过简单的替换计算来获得。因此,该算法可将信道与 IQ 不平衡分离开来进行灵活的补偿,且对训练序列没有任何限制。仿真结果表明,无论是60 GHz LOS(视距)还是 NLOS(非视距)信道,使用该方法均可得到很好的性能。
기우 SC-FDE(단재파빈역균형)화 OFDM(정교빈분복용)적60 GHz 통신계통,대연합신도고계적 IQ 불평형보상산법진행료연구。통과최소화 CRE(신도잔여능량),재미지 IQ 불평형삼수시가득 CIR(신도충격향응)적최우해。일단득도 IQ불평형삼수,CIR 적고계가이통과간단적체환계산래획득。인차,해산법가장신도여 IQ 불평형분리개래진행령활적보상,차대훈련서렬몰유임하한제。방진결과표명,무론시60 GHz LOS(시거)환시 NLOS(비시거)신도,사용해방법균가득도흔호적성능。
This paper studies the joint estimation and compensation algorithm for IQ imbalance and channel estimation for Sin-gle-Carrier Frequency Domain Equalization (SC-FDE ) and Orthogonal Frequency Division Multiplexing (OFDM)-based 60 GHz communication systems.It obtains the optimal solution of Channel Impulse Response (CIR)without knowing the IQ imbalance parameters by minimizing the Channel Residual Energy (CRE),but once the IQ imbalance parameters are received, the CIR estimation can be obtained by simple substitution calculations.Therefore,the proposed method can separate channels from IQ imbalance for flexible compensation without any restrictions on the training sequence.The simulation results show that this method exhibits good performances for either Line-Of-Sight (LOS)or Non-Line-Of-Sight (NLOS)60 GHz channels.