2022/01/26 by Hamed Hosseiny, Hosseiny, Hamed, Arman Farhang +4 · 1 citation
Computer Science · Engineering · #Advanced Wireless Communication Techniques #Base station #Channel (broadcasting) #Channel state information #Computer science #Electronic engineering #Engineering #FOS: Electrical engineering #MIMO #Orthogonal frequency-division multiplexing #PAPR reduction in OFDM #Precoding #Signal Processing (eess.SP) #Subcarrier #Telecommunications #Telecommunications link #Wireless #Wireless Communication Networks Research #eess.SP #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2201.10735
published in arXiv (Cornell University) (Cornell University)
arxiv created 2022/01/26 · openalex publication_date 2022/01/26 · arxiv updated 2022/01/27 · openalex created_date 2022/05/05 · openalex updated_date 2026/08/06
In this paper, a practical precoding method for the downlink of filter bank multicarrier-based (FBMC-based) massive multiple-input multiple-output (MIMO) is developed. The proposed method includes a two-stage precoder consisting of a fractionally spaced prefilter (FSP) per subcarrier for flattening/equalizing the channel across the subcarrier band, followed by a conventional precoder whose goal is to concentrate the signals of different users at their spatial locations. This way, each user receives only the intended information. In this paper, we take note that channel reciprocity may not hold perfectly in practical scenarios due to the mismatch of radio chains in uplink and downlink. Additionally, channel state information (CSI) at the base station may not be perfectly known. This, together with imperfect channel reciprocity can lead to detrimental effects on the downlink precoder performance. We theoretically analyze the performance of the proposed precoder in the presence of imperfect CSI and channel reciprocity calibration errors. This leads to an effective method for compensating these effects. Finally, we numerically evaluate the performance of the proposed precoder. Our results show that the proposed precoder leads to an excellent performance when benchmarked against OFDM.