Uplink channel estimation method, pilot signal transmission method and base station

A channel estimation and pilot signal technology, applied in the uplink channel estimation method, pilot signal transmission method and base station field, can solve the problems of mutual interference of SRS, affecting the accuracy of uplink channel estimation, etc., so as to improve the signal-to-interference noise ratio, improve Channel estimation accuracy, effect of reducing interference

Active Publication Date: 2019-10-11
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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Problems solved by technology

However, in this way, the SRSs sent by UEs to the base station interfere with each other, which affects the accuracy of uplink channel estimation.

Method used

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  • Uplink channel estimation method, pilot signal transmission method and base station
  • Uplink channel estimation method, pilot signal transmission method and base station
  • Uplink channel estimation method, pilot signal transmission method and base station

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Embodiment Construction

[0045] For the convenience of description, the UEs corresponding to the estimated uplink channels are called target UEs.

[0046] As mentioned above, the existing channel estimation methods are based on the SRS sent by the target UE that is orthogonal to other UEs in the cell, or based on the SRS sent by the target UE that is non-orthogonal to other UEs in the cell. In addition, SRS signals that are non-orthogonal to other UEs in the cell will also interfere with each other, which will affect the estimation accuracy of the uplink channel of the target UE, resulting in low estimation quality.

[0047] In view of the above problems, the embodiment of the present invention estimates the long-term channel characteristics of the target UE's uplink channel based on the channel estimation values ​​of the pilot signals of the preset number of UEs in the preset area for the target UE in the preset area parameters, and according to the long-term channel characteristic parameters, reconf...

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Abstract

An uplink channel estimation method, a pilot signal transmission method, and a base station, wherein the uplink channel estimation method includes: configuring uplink pilot resources for a target user equipment, where the target user equipment is located in a preset area; receiving the preset area The pilot signal of the user equipment in the preset area, and respectively calculate the estimated value of the uplink channel of the user equipment in the preset area; based on the estimated value of the uplink channel of the preset number of user equipment in the preset area, estimate the target user Long-term channel characteristic parameters of the uplink channel of the device; according to the long-term channel characteristic parameters of the target user equipment uplink channel, reconfigure the uplink pilot resources of the target user equipment; receive the pilot signal of the target user equipment, and Perform instantaneous channel estimation on the uplink channel of the target user equipment, and use the estimation result as the estimated value of the uplink channel of the target user equipment. The channel estimation quality can be improved by adopting the above solution.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an uplink channel estimation method, a pilot signal transmission method and a base station. Background technique [0002] In the uplink direction of data sent from user equipment (User Equipment, UE) to the base station, the sending resource of each UE is uniformly allocated and controlled by the base station. The base station needs to know the channel quality status of the UE in advance to determine which frequency band is suitable for the UE to transmit and which frequency band needs to be avoided as much as possible. When the channel fading changes in the uplink and downlink directions of the system are different, such as an FDD system, in order to obtain the uplink channel quality information, the UE needs to send a reference signal known to the receiving end, called Sounding Reference Signal (SRS) , or called a probing pilot signal, is an uplink pilot signal,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
CPCH04L25/0202H04L25/0224H04L5/0048
Inventor 陈晋辉徐伟杰齐江李维成
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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