Method and equipment for detecting middle guiding code sequence in TD-SCDMA system

A code division multiple access and time division synchronization technology, applied in transmission systems, selection devices, communication between multiple stations, etc. It can meet the problems of meeting, detection performance deterioration, etc., to achieve the effect of high correct detection probability, shortened search time, and low false detection probability.

A code division multiple access and time division synchronization technology, applied in transmission systems, selection devices, communication between multiple stations, etc. It can meet the problems of meeting, detection performance deterioration, etc., to achieve the effect of high correct detection probability, shortened search time, and low false detection probability.

CN1604662AActive Publication Date: 2005-04-06XUANPU INDUSTRY CO LTD
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  • Method and equipment for detecting middle guiding code sequence in TD-SCDMA system
  • Method and equipment for detecting middle guiding code sequence in TD-SCDMA system
  • Method and equipment for detecting middle guiding code sequence in TD-SCDMA system

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Embodiment Construction

[0056] based on the following image 3 , Pic 4-1 , 4-2 , 4-3, Figure 5-1 , 5-2 , 5-3, and Figure 6 ~ Figure 8 , to illustrate the preferred embodiment of the present invention.

[0057] Such as image 3 Shown is a schematic flow chart of the detection method of the present invention. First, the user terminal equipment obtains the corresponding code group according to the downlink synchronization code (SYNC-DL code) detected in the first step of the initial cell search, and generates four candidate Midamble code word sequences s in the code group (step 300) Then, the frame count is set to 1 (step 301); then, as step 302, the user terminal equipment will receive the Midamble code word sequence in the "search window" according to the relevant synchronization information given in the initial cell search first step , and the sampled values ​​of its nearby data to obtain the sampled sequence r. Among them, in order to overcome the performance degradation caused by the sam...

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Abstract

It is a kind of Midamble code sequence detection method and apparatus for TD-SCDMA mobile communication system. It can reach high detection probability and low missing probability under the condition of low signal-to-noise ratio and the under the environment of having frequency diffusion and time diffusion. It can also generate rejection mark and exclude a batch of wrong input incident, such as wrong code set sequence number input, wrong synchronous Information input and local oscillator has large frequency deviation, so to realize the reduction of initializing community research time in TD-SCDMA system. This invention includes the module and steps such as Midamble receives signal sample extraction, Midamble code sequence generation, slide association, delay envelope calculation, multi-frame combination, path selection, similar value calculation, maximum value detection, confidence level calculation and compare, the generation of detection rejection mark, and generation of detection Midamble code sequence number.

Description

technical field [0001] The present invention relates to a method applied to a wireless communication system, in particular to a method applied to a Time Division Synchronous Code-Division Multiple Access (TD-SCDMA) mobile communication system. A method and device for detecting a midamble (Midamble) sequence of a user terminal device in a Cell Search process. Background technique [0002] In 1946, Bell Laboratories in the United States proposed to divide the service area of ​​mobile phones into several cells, and set up a base station in each cell to form a new concept of cellular (Cellular) mobile communication in a cellular system. In 1978, this system was successfully tested in Chicago, USA, and it was officially put into commercial use in 1983. The adoption of the cellular system enables the same frequency to be used repeatedly, thereby greatly increasing the capacity of the mobile communication system and meeting the objective needs of the sudden increase of mobile comm...

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Application Information

Patent Timeline
06 Apr 2005
Publication
CN1604662A
IPC
H04W24/00; H04B1/69; H04B7/26
Inventors
谢一宁; 冉晓龙