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A pilot configuration method and device

A pilot configuration and pilot density technology, applied in the field of communication, can solve the problems affecting the channel estimation accuracy of the receiving end, low DMRS pilot density, and affecting the data demodulation performance of the receiving end, so as to ensure the effect of channel estimation

Active Publication Date: 2019-10-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To ensure data transmission efficiency, it is necessary to reduce the DMRS pilot density, which will directly affect the channel estimation accuracy of the receiving end, and then indirectly affect the data demodulation performance of the receiving end. The lower the problem, the worse the problem

Method used

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  • A pilot configuration method and device

Examples

Experimental program
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Effect test

example 1

[0178] see Figure 4-2 , which reflects the subframe port mapping situation when the number of moving bits is 3, where,

[0179] The port mapping of the first subframe is: the 0th subcarrier mapping ports 207, 208, 219, 225, the 1st subcarrier mapping ports 209, 210, 220, 226, and the 5th subcarrier mapping ports 211, 212, 221, 227 , 6th subcarrier mapping ports 213, 214, 222, 228, 10th subcarrier mapping ports 215, 216, 223, 229, 11th subcarrier mapping ports 217, 218, 224, 230;

[0180] The port mapping of the second subframe is: the 0th subcarrier mapping ports 213, 214, 222, 228, the 1st subcarrier mapping ports 215, 216, 223, 229, and the 5th subcarrier mapping ports 217, 218, 224, 230 , 6th subcarrier mapping ports 207, 208, 219, 225, 10th subcarrier mapping ports 209, 210, 220, 226, 11th subcarrier mapping ports 211, 212, 221, 227;

[0181] The port mapping of the third subframe is shifted by 3 bits on the basis of the second subframe, which is the same as the port ma...

example 2

[0183] see Figure 4-3 , which reflects the subframe port mapping situation with the number of moving digits being 2, where,

[0184] The port mapping of the first subframe is: the 0th subcarrier mapping ports 207, 208, 219, 225, the 1st subcarrier mapping ports 209, 210, 220, 226, and the 5th subcarrier mapping ports 211, 212, 221, 227 , 6th subcarrier mapping ports 213, 214, 222, 228, 10th subcarrier mapping ports 215, 216, 223, 229, 11th subcarrier mapping ports 217, 218, 224, 230;

[0185] The port mapping of the second subframe is: the 0th subcarrier mapping ports 215, 216, 223, 229, the 1st subcarrier mapping ports 217, 218, 224, 230, and the 5th subcarrier mapping ports 207, 208, 219, 225 , 6th subcarrier mapping ports 209, 210, 220, 226, 10th subcarrier mapping ports 211, 212, 221, 227, 11th subcarrier mapping ports 213, 214, 222, 228;

[0186] The port mapping of the third subframe is: the 0th subcarrier mapping ports 211, 212, 221, 227, the 1st subcarrier mapping p...

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Abstract

A pilot method and device, the method comprising: a base station determines whether data to be transmitted requires pilot density enhancement, and if so, determines the mapping location of the demodulation reference signal (DMRS) on each resources block, and establishes a mapping between the first subframe of the data to be transmitted and a designated antenna port according to the number of multiplexing layer; the base station determines, according to the number of continuous downlink subframes of the data to be transmitted, whether the subframes use the same antenna port mapping, adds the determination results to a scheduling instruction, and transmits the scheduling instruction to a terminal, the scheduling instruction including whether the antenna port mapping of each subframe has displacement and the number of displacement; the base station configures the antenna port mapping for each subframe according to the determination result. Thus, the channel estimation precision on the terminal side is ensured, thereby ensuring the data demodulation performance of the terminal. Particularly in the case of advanced data multiplexing, the solution does not cause substantial increase of pilot overhead and effectively enhances pilot density.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a pilot configuration method and device. Background technique [0002] With the continuous development of mobile communication technology, high speed, large capacity, and wide coverage have become the main features of modern wireless communication systems. How to solve the problems of severe fading and intersymbol interference caused by the expansion of communication range and complex and diverse communication environments is particularly critical. . In order to solve this problem, the technologies widely used at present are: MIMO (Multi-Input Multi-Output) technology which can significantly improve system capacity, OFDM (Orthogonal Frequency-Division Multiplexing, Orthogonal Frequency Division Multiplexing) ) as the representative multi-carrier modulation technology. [0003] In the OFDM system, the modulation of each carrier adopts suppressed carrier. Correspon...

Claims

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Application Information

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IPC IPC(8): H04W72/04
CPCH04W72/04
Inventor 刘永陈大庚
Owner HUAWEI TECH CO LTD