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A method for reducing uplink synchronous channel interference in TD-SCDMA access system

A technology for synchronous code division multiple access and access systems, which is applied in the field of interference reduction and can solve the problems of main public control physical channel signal-to-noise ratio performance loss, reduced interleaving time, and low transmission power.

Inactive Publication Date: 2005-11-02
NOKIA SOLUTIONS AND NETWORKS SYSTEM TECHNOLOGY (BEIJING) CO LTD
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Problems solved by technology

[0009] In the above method, since it is necessary to keep the transmission power of the main common control physical channel unchanged, after adding the orthogonal variable spreading factor codewords available for the main common control physical channel, the four spreading factors are The transmit power per code channel of the orthogonal variable spreading factor codeword of 16 is 3dB lower than the transmit power per code channel when only two orthogonal variable spreading factor codewords with spreading factor of 16 are used in the main common control channel , and the changed interleaving frame transmission method reduces the interleaving time of the main common control physical channel interleaving frame, which will bring about the loss of the main common control physical channel signal-to-noise ratio performance, resulting in the reduction of the main common control physical channel receiving performance

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  • A method for reducing uplink synchronous channel interference in TD-SCDMA access system
  • A method for reducing uplink synchronous channel interference in TD-SCDMA access system
  • A method for reducing uplink synchronous channel interference in TD-SCDMA access system

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Embodiment Construction

[0023] Figure 4 shows an embodiment of the present invention.

[0024] In the TD-SCDMA LCR system, an interleaving frame of a main common control physical channel includes four consecutive subframes (subframe i, subframe i+1, subframe i+2 and subframe i+3). The main common control physical channel uses a pair of orthogonal variable spreading factor code words C with a spreading factor of 16 according to the communication standard Q＝16 (k＝1) and C Q＝16 (k＝2) It is transmitted in TS0 of each subframe, and each TS0 includes two data parts before and after the training sequence, which are respectively marked as D1, D2, D3, D4, D5, D6, D7 and D8, such as Figure 4 shown in . According to the method in the present invention, the 4 consecutive subframes in a main public control physical channel interleaving frame in the TD-SCDMA LCR system are changed to be transmitted once every other subframe, and at the same time, in order to make up for the resulting main public control phy...

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Abstract

The invention provides a method for reducing the channel interference to the ascending channel of the time division synchronism code-division system, configuring 4 spread-spectrum factors for 16 orthogonal changeable spread-spectrum code words as the public control physical channel, changing the data part (D1, D2, D3, D4, D5, D6, D7 and D8)in the continuous 4 sub frames of the interlace frame in the main public control physical channel into 15 sub frames (sub frame i to sub frame i+14) and send every a sub frame.

Description

(1) Technical field [0001] The present invention relates to a method for reducing interference in a wireless communication system, and more particularly relates to a method for reducing uplink synchronization channel (UpPCH) interference in a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system. The method of the present invention can reduce the interference of the base station signals from the TD-SCDMA systems of different wireless operators when the base station (BS) receives the uplink synchronization channel, thereby improving the detection performance of the base station for the uplink synchronization channel and improving the user station (UE) Uplink synchronization efficiency. (2) Background technology [0002] Time Division-Synchronous Code Division Multiple Access Low Chip Rate (TD-SCDMA LCR) system is one of the third generation mobile communication system standards, working under the UTRAN (UMTS Terrestrial Radio Access Network) Partner Proje...

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Application Information

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IPC IPC(8): H04B15/00
Inventor 白伦博费尔博希伦布兰特卡马兰德
Owner NOKIA SOLUTIONS AND NETWORKS SYSTEM TECHNOLOGY (BEIJING) CO LTD
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