Hardware Implementation Method of Uplink Joint Carrier Synchronization Based on Massive MIMO
A carrier synchronization, hardware implementation technology, applied in the field of communication, can solve the problems of difficult application, high complexity, less application, etc., achieve accurate and reliable frequency offset estimation, optimize time domain frequency offset estimation results, and reduce implementation complexity. and the effect of resource consumption
Active Publication Date: 2020-10-02
SOUTHEAST UNIV
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On the other hand, the existing frequency offset compensation methods are often performed in the time domain, multiplying each received signal in the time domain by an angle related to the carrier frequency offset value to complete the compensation, while the frequency offset compensation method in the frequency domain is more complex , the application is difficult, resulting in less use in actual systems
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[0045] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0046]The massive MIMO-based uplink joint carrier synchronization hardware implementation method provided by the present invention is implemented based on FPGA, which is the most commonly used semi-custom circuit for hardware development, and many related auxiliary development products also accelerate the update and development of FPGA. Using the PXI platform of National Instrument (NI) for FPGA development breaks the tradition of hardware programming language for FPGA development. NI's LabVIEW programming idea based on graphic language makes hardware development more convenient and the development cycle is greatly shortened. Hardware developers can use More focus...
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The invention provides an uplink joint carrier synchronization hardware implementation method based on a large-scale MIMO. The method comprises the following steps: user equipment generates a baseband sequence signal and inserts the baseband sequence signal in a baseband frame signal for sending the same; a base station processes the received signal into a baseband signal, and accomplishes synchronous search to find a frame starting position; the base station intercepts the sequence signal and calculates carrier frequency offset through the sequence signal; an upper computer performs joint decision making on the carrier frequency offset value obtained by each path of antenna, calculates a unified carrier frequency offset expected value, and updates a carrier frequency offset compensation value; and the base station performs frequency offset compensation on the paths of received signals by using the updated carrier frequency offset compensation value. By adoption of the method provided by the invention, carrier frequency offset estimation and carrier frequency offset compensation can be well accomplished, the conditions of large scale and multiple antennas of the base station are effectively utilized, the precision of the calculated frequency offset value is high, and meanwhile the implementation complexity and the resource consumption of the frequency offset compensation on the FPGA are reduced, therefore the uplink joint carrier synchronization hardware implementation method is suitable for practical engineering application.
Description
technical field [0001] The invention belongs to the technical field of communication, and relates to a hardware implementation method of uplink joint carrier synchronization based on time division duplex TDD massive MIMO. Background technique [0002] With the popularization of mobile devices such as smartphones and tablets, the traffic of wireless communication data has shown explosive growth. Existing communication technologies such as LTE and Wi-Fi are difficult to meet the rapidly increasing throughput requirements, so research on new generation mobile communication technologies is put on the agenda. One of the cutting-edge technologies of the next generation of mobile communications is massive MIMO. One of its characteristics is that dozens or even hundreds of antennas are configured at the base station to serve user equipment with a relatively small number of antennas. By deploying a large number of antennas, the channel capacity and link reliability of massive MIMO a...
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IPC IPC(8): H04L27/00H04L27/26H04B7/0413
CPCH04B7/0413H04L27/0014H04L27/2657H04L2027/0026
Inventor 黄永明韩紫健
Owner SOUTHEAST UNIV