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Method for inserting down public guide frequency

A technology of common pilot frequency and pilot frequency slot, which is applied in the directions of pilot signal allocation, multi-frequency code system, communication between multiple stations, etc., which can solve the problems of system redundancy and lack of

Active Publication Date: 2012-07-25
SHANGHAI ULTIMATE POWER COMM TECH
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  • Abstract
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Problems solved by technology

[0007] The method of including downlink common pilots in each time slot is not suitable for TDD mode, because for TDD mode, each time slot can be used for both uplink and downlink, and only it is used for downlink transmission The downlink common pilot needs to be inserted only when the downlink common pilot is needed; secondly, if multiple consecutive time slots are used for downlink transmission, only one downlink common pilot needs to be inserted in one of the downlink time slots, because of the lack of necessary uplink feedback, if every Inserting common pilots in every downlink time slot will cause too much system redundancy

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  • Method for inserting down public guide frequency
  • Method for inserting down public guide frequency
  • Method for inserting down public guide frequency

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] see figure 2 , figure 2 A frame structure of TDD mode and an embodiment of inserting downlink common pilot are given. In this embodiment, a frame of this TDD mode is composed of 20 time slots, wherein the 1st, 7th, 8th, 14th, 15th, 16th, and 19th time slots are uplink time slots, and the 0th, 2nd, 3rd, 4th, Time slots 5, 6, 9, 10, 11, 12, 13, 17, and 18 are downlink time slots.

[0039]A scheme for dividing the data to be transmitted into one or more scheduling time periods, and making each downlink time slot in each frame of the data to be transmitted belong to and only belong to one scheduling time period is as follows: , Time slots 1, 2, 3, and 4 are divided into scheduling period 1, time slots 5, 6, 7, and 8 are divided into scheduling perio...

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Abstract

The invention is concerned with the method inserting downward public pilot in the time division double work system of the mobile communication technology, which is fit for the inserting downward public pilot in the time division double work system based on the orthogonal frequency-division multiplying multiple access, includes the following steps: A. divides the pre-transmitting data into severalcontinuous time sects, each time sect includes several time-gap of at least one downward time-gap; B. inserts the public pilot in one downward time-gap in each time sect. the invention can test the quality of the public pilot channel to achieve the dispatch based on the frequency domain.

Description

technical field [0001] The present invention relates to mobile communication technology, more precisely a method for inserting downlink common pilots in wireless data frames, suitable for time division duplex (TDD) systems based on OFDM, so that For the channel quality measurement of the common pilot, the scheduling based on the frequency domain is realized. Background technique [0002] At present, the third generation partnership project (3GPP) is in the process of long-term evolution (LTE) of the 3G mobile communication system, and basically determines to adopt Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology as the system air interface basic technology at the time. OFDM divides a wideband system into a number of very narrow sub-bands. For example, if a system transmits data on a bandwidth of 20MHz, OFDM can divide the bandwidth into hundreds to thousands of sub-bands, and the interval between each sub-band is betw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04L27/26
CPCH04L27/261H04L5/0091H04B7/2653H04L5/005H04W72/542
Inventor 索士强孙韶辉王映民
Owner SHANGHAI ULTIMATE POWER COMM TECH
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