Pilot frequency configuration determination method and base station

A determination method and pilot technology, which is applied in the field of communication, can solve the problems that the determination method of pilot frequency arrangement cannot optimize the pilot frequency arrangement of MIMO system, and achieve the effect of strong versatility, flexibility and low complexity

Active Publication Date: 2015-06-17
HUAWEI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Embodiments of the present invention provide a pilot arrangement determination method and a base station, which are used to solve the proble

Method used

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  • Pilot frequency configuration determination method and base station
  • Pilot frequency configuration determination method and base station
  • Pilot frequency configuration determination method and base station

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Embodiment Construction

[0040] In view of the problem that the existing pilot arrangement determination method cannot determine the optimal pilot arrangement for the sparse channel of the MIMO system, an embodiment of the present invention provides a method for determining the pilot arrangement. The process of the method is as follows figure 2 As shown, the execution steps are as follows:

[0041] S20: Select the first optimized pilot arrangement P1 from the available subcarrier set G as the pilot arrangement of the first transmit antenna, let G1=G-P1.

[0042] Such as figure 1 As shown, the base station has N t There are N transmitting antennas within the coverage of the base station u mobile stations, and each mobile station has 1 antenna, thus constructing a N t ×N u multi-user MIMO system. There are many propagation paths from the base station to the mobile station, in addition to the direct path and several reflection paths, the effect of multipath propagation is significant. Assume that ...

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Abstract

Disclosed are a pilot frequency arrangement determination method and a base station, wherein the method comprises: S1, selecting a first optimized pilot frequency arrangement P1 from an available subcarrier set G as a pilot frequency arrangement of a first transmitting antenna and making G1=G-P1; S2, performing a cyclic shift on the P1; if a Pi obtained after the shift is a subset of the G1, using the Pi as a pilot frequency arrangement of an ith transmitting antenna; if the Pi obtained after the shift is not the subset of the G1, selecting the Pi from the G1 as the pilot frequency arrangement of the ith transmitting antenna; making G1=G1-Pi and i=i+1, and repeatedly executing S2 until the i equals a number of transmitting antennas. A scheme ensures that those determined specific to sparse channels of an MIMO system are all optimized pilot frequency arrangements.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for determining pilot frequency arrangement and a base station. Background technique [0002] The multiple-input multiple-output (Multi-Input Multi-Output, MIMO) technology can obtain considerable diversity gain and multiplexing gain, thereby improving the reliability and transmission rate of the wireless communication system. This technology has been widely used in various wireless communication systems, such as Long Term Evolution (LTE) system, Worldwide Interoperability for Microwave Access (WiMax) system and so on. However, as the number of antennas at the transmitter and receiver increases, the number of unknown channels also increases. For example, Release 11 of the 3rd Generation Partnership Project (3GPP) supports downlink8 ×8 MIMO architecture, the receiving end needs to obtain 8×8=64 channel state information (Channel State Information, CSI) before sign...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04B7/04
CPCH04B7/0413H04L5/0048H04L5/0023H04L5/0037H04B7/0452H04W88/08
Inventor 戚晨皓吴艺群张舜卿
Owner HUAWEI TECH CO LTD
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