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Method for improving synchronous channel bandwidth efficiency of TDD system and method for transmission of special pilot frequency

A technology of time division duplex system and dedicated pilot frequency, which can be used in code division multiplexing system, transmission system, multiplexing communication, etc. Effect

Inactive Publication Date: 2008-02-27
ZTE CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for improving the bandwidth efficiency of the synchronous channel of a time-division duplex system, and to solve the problem that when the bandwidth of the time-division duplex system is greater than 1.25 MHz, the downlink pilot time slots are not available for resources other than the synchronous channel. waste problem

Method used

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  • Method for improving synchronous channel bandwidth efficiency of TDD system and method for transmission of special pilot frequency
  • Method for improving synchronous channel bandwidth efficiency of TDD system and method for transmission of special pilot frequency

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Embodiment Construction

[0022] The technical solution of the present invention is that when the bandwidth of the time division duplex system is greater than the reference bandwidth of 1.25MHz, the base station can send dedicated pilots on some or all frequency resources except the synchronization channel on the DwPTS time slot according to specific needs, and when When the number of antennas of the base station exceeds 1, the dedicated pilots among the antennas adopt frequency division multiplexing or code division multiplexing or a combination of frequency division multiplexing and code division multiplexing.

[0023] The role of the dedicated pilot mainly has the following two points:

[0024] 1. It is used for channel measurement by the mobile station. The measurement pilots of antenna 1 / 2 / 3 / 4 can be sent here, and the pilots between different antennas adopt the method of frequency division multiplexing.

[0025] 2. The dedicated pilot frequency can also be used for channel estimation in the case ...

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Abstract

This invention relates to a method for increasing synchronous channel bandwidth efficiency of TDD system, when the bandwidth of the TDD system is larger than a primary bandwidth, the base station sends special pilot frequency on the frequency resource of down pilot time slot of the radio frame except the synchronous channels. This invention also provides a method for transmitting special pilot frequency of the TDD system including: a base station transmits special pilot frequency on the frequency resource of down pilot time slot of the TDD system except synchronous channels.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for improving the bandwidth efficiency of a synchronous channel of a TDD (Time Division Duplex, Time Division Duplex) system and sending a dedicated pilot. Background technique [0002] When the mobile station initially accesses the system or switches between cells, the mobile station needs to perform a cell search process. The cell search process is performed based on a synchronization channel (Synchronization Channel, SCH). The synchronization channel usually has a special structure and is sent on a fixed time-frequency resource to facilitate detection by the mobile station and establish a connection with the system. [0003] Figure 1 is a wireless frame structure-TDS-CDMA (TimeDivision-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) frame structure of a time division duplex system based on OFDM (Orthogonal Freque...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04B1/707H04J13/02H04B7/26
Inventor 夏树强梁春丽喻斌
Owner ZTE CORP
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