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Single-precision ADC adaptive threshold quantification method based on large-scale MIMO

A technology of adaptive threshold and quantization method, which is applied in the field of adaptive threshold quantization of single-precision ADC based on massive MIMO, to achieve the effect of improving overall performance, improving accuracy and reducing complexity

Active Publication Date: 2016-09-21
苏州兆见智能科技有限公司
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Problems solved by technology

Moreover, the ultra-low quantization accuracy of single-precision ADC poses challenges to existing channel estimation and signal detection.

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  • Single-precision ADC adaptive threshold quantification method based on large-scale MIMO
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  • Single-precision ADC adaptive threshold quantification method based on large-scale MIMO

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in detail, but in the description of the present invention, it should be understood that, the described embodiment of the present invention is exemplary, and the specific parameter that appears in the description is only for It is convenient to describe the present invention, but should not be construed as a limitation of the present invention.

[0037] refer to figure 1 , considering a massive MIMO uplink multi-user transmission scenario model of a single cell, the number of antennas configured at the base station is M, serving K single-antenna users (M>>K), the M antennas are divided into G groups, each The antennas within the group have a strong correlation. On the base station side, each antenna is configured with a pair of single-precision ADCs for analog-to-digital conversion of I-channel and Q-channel signals. In an uplink transmission, the baseband signals...

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Abstract

The invention discloses a single-precision ADC adaptive threshold quantification method based on large-scale MIMO. The method comprises the following steps of performing modeling on a real scene, obtaining channel data as a training sequence by means of the modeled large-scale MIMO scene, classifying the channel data with interdependency by means of an LBG linear classifying method, obtaining the mass center of each kind and the boundary between the mass centers, finding out a mapping relation between the mass centers and quantized values and a mapping relation between the boundary and an adaptive threshold, and establishing an adaptive threshold setting method by means of correlation in an actual antenna model based on the mapping relations; generating signals which are received by a base station end on condition of different user transmitting powers by means of an existing large-scale MIMO channel model, obtaining the quantification threshold and the quantized value which correspond with different user transmitting powers in the scene through mapping; and simulating the uplink of an actual system. The single-precision ADC adaptive threshold quantification method effectively improves channel estimation accuracy and furthermore reduces symbol error rate in uplink signal detection.

Description

【Technical field】 [0001] The invention relates to a single-precision ADC configured with an antenna radio frequency (RF) port in a massive MIMO system in the field of fifth-generation mobile communication technology, and in particular to a single-precision ADC adaptive threshold quantization method based on massive MIMO. 【Background technique】 [0002] In a massive MIMO system, due to the need for digital processing, a radio frequency (RF) port of each antenna needs to be configured with a pair of analog-to-digital converters (ADC) for analog-to-digital conversion of the I channel and the Q channel respectively. High-precision ADCs will lead to increased power dissipation and hardware costs, which greatly increase the deployment costs and energy consumption of base stations in massive MIMO with hundreds of antennas. The use of single-precision ADC (1-bit ADC), on the one hand, can greatly reduce the cost and the complexity of base station operations, on the other hand, singl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/10H03M1/12
CPCH03M1/1038H03M1/121
Inventor 李国兵严飞吕刚明张国梅任品毅
Owner 苏州兆见智能科技有限公司
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