A massive MIMO FBMC beam space-time coding downlink transmission method

A transmission method and space-time coding technology, applied in the field of wireless transmission, can solve problems such as not considering multi-users

Active Publication Date: 2020-10-27
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

But the article considers the point-to-point communication system, and does not consider the problem of multi-user

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  • A massive MIMO FBMC beam space-time coding downlink transmission method
  • A massive MIMO FBMC beam space-time coding downlink transmission method
  • A massive MIMO FBMC beam space-time coding downlink transmission method

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Embodiment Construction

[0070] In a Massive MIMO FBMC system, a multi-beam space-time coding multi-user downlink channel transmission method includes a base station with a large-scale uniform linear array, the number of antennas is M, and U single-antenna user nodes, when considering the angle, each other No overlap; the number of subcarriers in the FBMC system is M sc , the prototype filter is the PHYDYAS prototype filter, the overlap factor is K, and the length is L.

[0071] A hybrid beamforming and space-time coding multi-user downlink signal transmission method in a Massive MIMO system, the system model is as follows figure 1 As shown, the base station performs Alamouti encoding on the sending data at the sending end and uses FBMC modulation to serve multiple users at the same time and frequency through multiple beams. The specific steps are as follows:

[0072] 1) The base station performs OQAM modulation on the data sent to the user to obtain real data symbols.

[0073] The base station perf...

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Abstract

The invention discloses a Massive MIMO FBMC beam space-time encoding downlink transmission method. The method comprises the following steps: performing OQAM modulation, Alamouti block encoding and FBMC modulation on the bit stream information sent to a user to obtain a to-be-sent signal, then performing linear weighting, arriving at different users at different moments by sending channels after different fading, performing FBMC modulation on the received signal by the user, calculating an equivalent channel, performing MMSE channel equalization, and finally performing OQAM demodulation to restore the bit stream information sent by a base station to the user. According to the Massive MIMO FBMC beam space-time encoding downlink transmission method disclosed by the invention, two high-quality techniques, namely Massive MIMO and the FBMC, are combined together, thereby greatly improving the capacity, the energy efficiency and the spectrum effectiveness of the system, eliminating the interference between users, reducing the operation amount, reducing the self interference in FBMC system and improving the bit error rate performance of the system.

Description

technical field [0001] The invention belongs to the technical field of wireless transmission, and in particular relates to a Massive MIMO FBMC beam space-time coding downlink transmission method. Background technique [0002] As a key technology in the fifth-generation mobile communication system, Massive MIMO uses a large-scale antenna array at the base station. When there are many (infinity) antennas, the channels corresponding to different users are approximately orthogonal in space, so that the base station can Serve multiple users in the same time-frequency resource. Many performances of the system in Massive MIMO are related to large-scale fading, but not to small-scale fading. Filter bank multi-carrier (FBMC) technology is listed as one of the candidate solutions for 5G. While maintaining high-speed data transmission and effectively combating frequency selective fading, the prototype filter with good time-frequency focusing characteristics can be effectively reduced....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L25/03H04L27/26H04L27/34H04B7/08
CPCH04B7/0854H04L1/0612H04L1/0618H04L25/03305H04L25/03821H04L27/2628H04L27/264H04L27/265H04L27/3483Y02D30/70
Inventor 王慧明郑修鹏史珂
Owner XI AN JIAOTONG UNIV
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