Up inserting detection method

A detection window and data detection technology, which is applied in communication between multiple stations, space transmit diversity, code division multiplexing system, etc., can solve problems affecting system access performance and detection performance deterioration, and achieve Improve detection performance and improve the effect of uplink access detection performance

Inactive Publication Date: 2007-03-21
POTEVIO INFORMATION TECH
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Problems solved by technology

Under this process, when the GP+UpPTS period of the system is strongly interfered, that is, some chips in the detection window are subject to strong interference, the detection data vector obtained after shaping filtering and sampling is the same as these The detection data corresponding to the interference chip time also contains strong interference signal components, and the uplink access detection results obtained after using such detection data vectors for subsequent correlation calculations, multi-antenna combination, and signature sequence identification are also The introduction of strong interference degrades the uplink access detection performance and seriously affects the access performance of the system

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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings and examples.

[0039] The basic idea of ​​the present invention is to estimate the interference power envelope for the detection data obtained through shaping filtering and sampling, and use the estimation of the interference power envelope in the detection window to carry out weighting to suppress the interference existing in the detection data vector; The weighted detection data vector is used to perform subsequent correlation calculation, multi-antenna combination and signature sequence identification, so as to obtain the uplink access detection result.

[0040] Fig. 3 is an overall flow chart of the uplink access detection method in the present invention. As shown in Figure 3, the method includes:

[0041] Step 301, performing shaping filteri...

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Abstract

A method for detecting uplink access includes carrying out shape filtering-sampling on received data of current sub frame in detection window of all receiving antennas to obtain detection data vector of current sub frame for each receiving antenna, weighting said vector according to estimation of interference power envelope in detection window of each receiving antenna, carrying out correlation operation on weighted vector and detected signature sequence, making multiantenna combination on obtained correlation calculation result of each receiving antenna and carrying out signature sequence identification on combined result.

Description

technical field [0001] The invention relates to an access detection technology, in particular to an uplink access detection method in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system. Background technique [0002] TD-SCDMA system is a time-division synchronous CDMA system. In this system, strict uplink synchronization is realized through software and frame structure design. The frame structure of TD-SCDMA system has four layers: super frame, wireless frame, sub frame and time slot / code. Wherein, a superframe is 720 ms long and consists of 72 radio frames, each radio frame is 10 ms long and includes two 5 ms subframes. The specific subframe structure is shown in Figure 1. A 5ms subframe consists of 3 special time slots and 7 regular time slots. The 3 special time slots are the downlink pilot time slot (DwPTS) lasting 96 chips (chip), the uplink pilot time slot (UpPTS) lasting 160 chips, and the guard interval (GP) lasting 96 chips; 7 regular time ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04B1/707H04B7/26H04J13/02H04B1/7105
Inventor 何磊吕伯轩
Owner POTEVIO INFORMATION TECH
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