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Method and apparatus for testing downlink forming gain of time-division synchronous code division multiple access TD-SCDMA intelligent antenna

A technology of TD-SCDMA and synchronous code division multiple access, applied in the field of communication

Active Publication Date: 2011-03-16
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0010]Obviously, for the above-mentioned existing test method, due to the shape-forming gain obtained only through the difference of DPCH, and the time points of the two tests are different, the error is relatively large , cannot truly reflect the downlink shaped gain
In addition, the above-mentioned existing methods can only be tested at a fixed location, but cannot test the change of the downlink shaping gain of the smart antenna during the movement of the terminal, and the distance between the terminal and the base station varies with time during the movement. Constantly changing, so the reliability of the test will decrease, and it cannot reflect the downlink shaped gain characteristics of the smart antenna very well
In addition, the above-mentioned existing method needs to perform frequent opening and closing operations, which will cause duplication of labor for testers and increase test costs.

Method used

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  • Method and apparatus for testing downlink forming gain of time-division synchronous code division multiple access TD-SCDMA intelligent antenna
  • Method and apparatus for testing downlink forming gain of time-division synchronous code division multiple access TD-SCDMA intelligent antenna
  • Method and apparatus for testing downlink forming gain of time-division synchronous code division multiple access TD-SCDMA intelligent antenna

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Embodiment Construction

[0046] The present invention mainly utilizes the characteristic that the primary common control physical channel (PCCPCH, Primary Common Control Physical Channel) in the TD-SCDMA system does not form a shape, and then combines PCCPCH and DPCH path losses to be equal, to test the downlink of the TD-SCDMA smart antenna Shape gain.

[0047] Such as image 3 As shown, briefly introduce the time slot structure of TD-SCDMA system. The TD-SCDMA system belongs to the time-division system, that is, each 10ms wireless frame is divided into 5ms subframes, and the structures of the two subframes are exactly the same. Each subframe includes 7 regular slots and 3 special slots. Among them, 7 regular time slots are TS0~TS6; 3 special time slots are downlink pilot channel (DwPCH, DownlinkPilot Channel), guard interval (GP) and uplink pilot channel (UpPCH, Uplink PilotChannel).

[0048] Generally, TS1-TS3 are uplink time slots, TS4-TS6 are downlink time slots, TS0 can only be downlink time ...

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Abstract

The present invention provides a test method of downlink forming gains of smart antenna Time in Division Synchronous Code Division Multiple Access, which comprises the following procedures: open the downlink forming to connect in the test terminal, and output the DPCH_RSCP value and the PCCPCH_RSCP value; calculate respectively the mean values of RSCP2 and RSCP1 of the DPCH_RSCP value and the PCCPCH_RSCP value according to test time; perform subtraction operation between RSCP and RSCP1, and the difference value is the downlink forming gains. Moreover, the invention is also a test device, which comprises: a power acquisition, which is used for judging and shifting the DPCH_RSCP value and the PCCPCH_RSCP value tested by the terminal; a mean valve calculating unit, which is used for calculating respectively the mean values of RSCP2 and RSCP1 of the DPCH_RSCP value and the PCCPCH_RSCP value according to test time; a test output unit, which is used for calculating the difference value of RSCP2 and RSCP1 so as to obtain the downlink forming gains and output the test result. The invention can test accurately and rapidly change of downlink forming gains of base station smart antenna during the moving of the terminal.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for testing the downlink shaping gain of a time division-synchronous code division multiple access TD-SCDMA smart antenna. Background technique [0002] The smart antenna technology is one of the key technologies of the Time-Division Synchronization Code Division Multiple Access (TD-SCDMA, Time-Division Synchronization Code Division Multiple Access) system. [0003] The smart antenna of TD-SCDMA uses a circular antenna array, which consists of 8 identical antenna elements evenly distributed on a circle with a radius of R. The elevation radiation pattern of the smart antenna is the same as that of each antenna element. The direction pattern in the azimuth is controlled by the baseband processor, which can generate multiple beams at the same time, and shape them arbitrarily within a range of 360° according to the distribution of communication terminals. In order to e...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/08H04W52/12H04W52/14H04B17/14
Inventor 朱黎宏李晓卡王舸
Owner DATANG MOBILE COMM EQUIP CO LTD
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