An Efficient Hybrid Beamforming for Uplink Transmissions of 60GHz Millimeter-Wave Communications
In this investigation, a promising hybrid beamforming technology for the uplink transmissions of the emerging 60 GHz millimeter-wave system is proposed, in order to effectively compromise the performance and implementation complexity. The beam switching b
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An Efficient Hybrid Beamforming for Uplink Transmissions of 60GHz Millimeter-Wave Communications Chenglin Zhao, Wei Zhang, Bin Li, Yun Liu, and Zhou Li
Abstract In this investigation, a promising hybrid beamforming technology for the uplink transmissions of the emerging 60 GHz millimeter-wave system is proposed, in order to effectively compromise the performance and implementation complexity. The beam switching based on the predefined beam codebook, is applied at the transmitter; while a step-wise refinement-based beam switching technology and further improved recursive least squares algorithm are used at the access point receiver. The simulation further validates the effectiveness of this presented hybrid beam forming algorithm, and the results show that our new scheme can significantly enhance the SINR performance of the received signal in access point. Keywords 60GHz millimeter-wave • Hybrid beamforming • Uplink communication • Improved recursive least squares (RLS)
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Introduction
With the continuous improvement of high-quality data transmission, the demands on wireless communications transmission rate and signal bandwidth keep growing. For the reason of the availability of abundant spectrum resources and the potential C. Zhao (*) School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China e-mail: [email protected] W. Zhang • B. Li Beijing University of Posts and Telecommunications, Beijing, China e-mail: [email protected]; [email protected] Y. Liu • Z. Li China Academy of Telecommunications Research, Ministry of Industry and Information Technology Telecommunication Metrology Center, Beijing, China e-mail: [email protected]; [email protected] Q. Liang et al. (eds.), Communications, Signal Processing, and Systems, Lecture Notes in Electrical Engineering 202, DOI 10.1007/978-1-4614-5803-6_29, # Springer Science+Business Media New York 2012
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providing high-speed data rate, the 60 GHz millimeter-wave communications recently gained more and more attention for the development of short-range highspeed wireless networks [1]. The transmission path loss of 60 GHz millimeter-wave is very serious in practice [2], which may also facilitate short range security communication. Another primary advantage is beamforming, which can be easily implemented on tiny portable devices for millimeters wavelength and commonly adopted to improve the link communication qualification. For example, the lower complicated beam switching based on the fixed codebook has been adopted in IEEE 802.15.3c criteria [3] and IEEE 802.15.ad criteria [4]. However, it is relatively difficult to acquire the best transmission performance when multi-links are communicating, as the high side-lobe gain may introduce noticeable interference. In this paper, we propose an efficient hybrid beamforming in order to compromise between performance and complexity, which can be properly used to convey high rate information over relatively short distances in 60 GHz high data rate
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