A Large-Scale MIMO-Based Single-precision ADC Adaptive Threshold Quantization Method

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

[0001] 【Technical field】 [0002] 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. [0003] 【Background technique】 [0004] 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 ot...

AI Technical Summary

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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