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A realization method of MIMO system channel estimation in ADMA scene

A technology of channel estimation and implementation method, applied in channel estimation, baseband system, transmission system, etc., can solve problems such as low efficiency and slow estimation speed, and achieve the effect of high data throughput, reduced mean square error, and reduced complexity

Active Publication Date: 2020-10-02
NANJING UNIV
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  • Application Information

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Problems solved by technology

If it is implemented only by software method, the estimation speed will be relatively slow and the efficiency will be very low.

Method used

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  • A realization method of MIMO system channel estimation in ADMA scene
  • A realization method of MIMO system channel estimation in ADMA scene
  • A realization method of MIMO system channel estimation in ADMA scene

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Embodiment Construction

[0030] In order to describe the technical solution disclosed in the present invention in detail, further elaboration will be made below in conjunction with specific embodiments and accompanying drawings.

[0031] In a multi-user massive MIMO system, the antenna array of the base station is in the form of a uniform linear antenna array, the interval is d, and the number of antennas is M (M>>1). There are K randomly distributed in the cell covered by the base station users, and user terminals are all single-antenna terminals. The channel specifies that the fading model is slow fading. The signal sent by user k to the base station contains P beams (P>>1), then the impulse response vector of the user's uplink channel can be expressed as:

[0032]

[0033] Among them, the array flow pattern vector is as follows:

[0034]

[0035] and α kp is the complex gain.

[0036] The transmission strategy of the present invention is as figure 1 As shown, the preamble part of the tra...

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Abstract

The invention discloses a realization method for MIMO (Multiple Input Multiple Output) system channel estimation in an ADMA scene. According to the method, through utilization of sparsity of DFT of channel impulse response vectors in a massive MIMO system, on the basis of least square estimation, a specific preamble-uplink estimation-downlink estimation transmission policy for the ADMA scene is provided. According to the policy, a hardware realization method taking a pipeline structure and a systolic array structure as main structures is carried out. According to the method, the complexity ofthe channel estimation of the other massive MIMO system and the overhead of feeding a back channel estimation result are greatly reduced. According to the benefit from channel reciprocity in the ADMAscene, channel characteristics and estimation methods of uplinks and downlinks are very similar. A hardware realization aspect is benefited from the high-efficiency pipeline operation and systolic array structure design. A realization scheme of a whole system is relatively small in area and relatively high in data passing rate.

Description

technical field [0001] The invention belongs to the technical field of wireless mobile communication, and in particular relates to a method for realizing channel estimation of a MIMO system under an ADMA scene. Background technique [0002] In recent years, with the explosive growth of mobile applications and the vigorous development of high-quality multimedia services such as data and video in the modern information society, the existing 4G mobile communication technology cannot meet the needs of enterprises and consumers for a long time. Therefore, 5G mobile communication technology with stronger bearing capacity and wider application scenarios has emerged as the times require. Massive Multiple Input Multiple Output (Massive Multiple Input Multiple Output, massive MIMO) is one of the key technologies of 5G. It has become a research hotspot because of its advantages of high spectral efficiency, high power efficiency and high robustness. The performance of massive MIMO syst...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04B7/0413
CPCH04B7/0413H04L25/0204H04L25/0224H04L25/024
Inventor 沙金刘晓真张川蔡亦倩邓香云
Owner NANJING UNIV