Millimeter wave transmission method and communication system combining low-precision ADC and hybrid precoding
A transmission method and precoding technology, applied in the field of millimeter wave communication, can solve the problems of large delay and loss of accuracy in beam scanning and channel estimation stages, and achieve the effect of saving time and difficulty in feedback
Active Publication Date: 2019-05-31
SOUTHEAST UNIV
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Problems solved by technology
However, under the hybrid precoding module, since the received signal has to be processed by analog combining, and the radio frequency link is reduced, the time delay in the beam scanning and channel estimation stages is relatively large
The low-precision analog-to-digital converter module also has certain defects. Although the system power consumption is greatly reduced, it is at the cost of loss of accuracy.
No one has yet proposed a solution that combines the advantages of the above two
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[0027] In the following description, for purposes of illustration rather than limitation, specific details are set forth, such as specific system architectures, in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details.
[0028] The scheme described in this article can be used in various mmWave communication systems, including time division duplex (TDD) and frequency division duplex (FDD). The base station end and user end described in this document are suitable for describing any sending and receiving pair.
[0029] In order to make the purpose, technical solution and advantages of the present invention more clear, the following will be described in detail with reference to the accompanying drawings. The embodiment of the present invention provides a millimeter-wave transmission method combining low-precision analog-to-d...
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The invention discloses a low-precision ADC (analog-digital conversion) and mixed precoding combination millimeter wave transmission method and a communication system. A base station and a user employ an electronic switch to achieve switching between a low-precision analog-digital converter and a mixed precoding module at a beam scanning stage, and employ the mixed precoding module at the stages of precise channel estimation and data transmission. The method comprises the specific steps that 1, the base station carries out the gating of the mixed precoding module at the beam scanning stage, and carries out the beam scanning after the simulation precoding of the beam training data; 2, the user carries out the gating of the low-precision analog-digital converter, and estimates the angle information from the received data; 3, the user carries out the gating of the mixed precoding module, and carries out the beam scanning or feeds back the angle information to the base station after the simulation precoding of the beam training data; 4, the base station carries out the gating of the low-precision analog-digital converter, and obtains the angle information from the received data; 5, the base station and the user carry out the gating of the mixed precoding module at the stages of precise channel estimation and data transmission, and carry out the precise channel estimation and data transmission.
Description
technical field [0001] The invention relates to a millimeter-wave transmission technology combining a low-precision analog-to-digital converter and a hybrid precoding, and belongs to the technical field of millimeter-wave communication. Background technique [0002] The millimeter wave frequency band has abundant bandwidth resources, so using the millimeter wave frequency band to expand the communication bandwidth in the field of wireless communication is an effective way to increase the data transmission rate, so as to achieve the expectation of the peak data rate of 5G exceeding 10Gbps. In recent years, more and more millimeter wave communication systems are used for point-to-point trunk data transmission, and become a research and development hotspot in the field of mobile communication. Compared with most current wireless systems, the millimeter wave system has a carrier frequency dozens of times higher than the latter, so the free space path loss of the millimeter wave ...
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IPC IPC(8): H04B1/00H04B7/0456H04B7/06H04B7/08H04L25/02
CPCH04B1/0007H04B7/0456H04B7/0621H04B7/0684H04B7/0695H04B7/088H04L25/0202
Inventor 金石杨杰阳析韩瑜
Owner SOUTHEAST UNIV