A base station DAC precision configuration method in a large-scale mimo system

A configuration method and large-scale technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve the problems of reduced downlink achievable rate, low accuracy, and impact on downlink data transmission performance, etc. Achieve the effect of minimizing hardware and power consumption costs, flexible value selection, and reducing computational complexity

Active Publication Date: 2020-04-03
白盒子(上海)微电子科技有限公司
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Problems solved by technology

[0004] In a massive MIMO system, using a low-precision DAC for the base station, although reducing hardware and power consumption costs, will obviously affect the data transmission performance of the downlink
The lower the accuracy of the DAC, the lower the power consumption, but the achievable rate of the downlink will also be reduced

Method used

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  • A base station DAC precision configuration method in a large-scale mimo system
  • A base station DAC precision configuration method in a large-scale mimo system
  • A base station DAC precision configuration method in a large-scale mimo system

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] figure 1 A block diagram of a transmitting end and a receiving end of a massive MIMO system downlink in the present invention is shown. The base station acts as the transmitter. The original transmitted data generates M symbols through the modulation module, and then generates N complex signals through the precoding module. The real part and the imaginary part are respectively converted from digital to analog to generate analog signals, and finally processed by the radio frequency link (RF) Then transmit through N antennas. M single-antenna users are used as the receiving end, after the received signal is processed by the radio frequency link, the analog-to-digital conversion is performed to obtain a digital signal, and finally the original transmission data is restored by the demodulation module.

[0024] figure 2 Under the condition of high signal-to-noise...

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Abstract

The invention discloses a base station DAC precision configuration method in a large-scale MIMO system. In the large-scale MIMO system, a base station configured with a plurality of antennas serves a plurality of single-antenna users at the same time. A downlink is considered, and a base station serving as a transmitting end needs to be configured with a large number of antennas, therefore the overall power consumption of the transmission system can be effectively reduced by configuring a low-precision DAC to each transmitting antenna unit. Each receiving antenna of a terminal user is configured with 1 bit quantized ADC, a target data rate of each user is specified, and by adoption of the base station DAC precision configuration method disclosed by the invention, the optimal base station DAC precision satisfying the requirements can be determined by calculation according to such fixed parameters as the number of the antennas of the base station and the number of terminal devices, and so on. The base station DAC precision configuration method disclosed by the invention has the advantages of being simple in calculation, realizing the target performance of the system at the minimum power consumption cost and having guiding significance for the design and implementation of the large-scale MIMO system.

Description

technical field [0001] The invention relates to a precision configuration method of a base station DAC (digital-to-analog conversion unit) in a large-scale MIMO (multiple-input multiple-output) system, which belongs to the wireless communication technology. Background technique [0002] In recent years, in the field of wireless communication, MIMO technology, that is, configuring multiple transmitting antennas and receiving antennas at the transmitting end and receiving end respectively, has attracted widespread attention. MIMO technology can significantly improve the spectrum transmission efficiency and channel capacity of the system through space division multiplexing, and has obvious advantages. On this basis, massive MIMO technology greatly improves the spatial freedom of signal transmission by configuring hundreds or thousands of antennas in the base station, and has become one of the key technologies of the next-generation wireless communication system (5G). Furthermo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/06
CPCH04B7/0413H04B7/06Y02D30/70
Inventor 许威徐锦丹张华
Owner 白盒子(上海)微电子科技有限公司
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