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Method and apparatus for eliminating descending pilot frequency time slot signal disturbance

A technology for uplink pilot time slot and signal interference, which is applied in the field of eliminating downlink pilot time slot signal interference, and can solve problems such as increasing the amount of calculation

Inactive Publication Date: 2008-01-23
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing algorithm not only increases the amount of calculation in the implementation of the algorithm, but also introduces interference in the detection area where the reflected signal of the downlink pilot signal does not interfere

Method used

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  • Method and apparatus for eliminating descending pilot frequency time slot signal disturbance
  • Method and apparatus for eliminating descending pilot frequency time slot signal disturbance
  • Method and apparatus for eliminating descending pilot frequency time slot signal disturbance

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Embodiment Construction

[0104] The core of the present invention is to simplify the process of eliminating the reflected signal of the downlink pilot signal in the signal when the base station receives the uplink pilot time slot signal. For this reason, the present invention performs interference elimination on the received current subframe signal according to the interference estimation value of the downlink pilot signal of the previous subframe, and uses the interference-eliminated signal as a pure signal without interference. In order to effectively obtain the pure signal and reduce the calculation and implementation complexity of the interference estimation value, the present invention performs SYNC_UL code detection on the uplink pilot time slot signal of the current subframe after the interference is eliminated, and determines the next Subframe downlink pilot slot signal interference estimation value. If no SYNC_UL code is detected in the uplink pilot time slot signal of the mth subframe, then ...

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Abstract

The present invention discloses a method to eliminate a downlink pilot frequency time slot signal interference, which includes procedures below: Firstly, it is necessary to obtain an estimated value of an m-1 sub-frame of downlink pilot frequency time slot signal inference. Wherein, the m is not less than 1. According to the estimated value of the m-1 sub-frame of the downlink pilot frequency time slot signal inference, an m sub-frame of uplink pilot frequency time slot signal interference is eliminated to obtain a pure m sub-frame of uplink pilot frequency time slot signal. In addition, the present invention discloses a device to eliminate downlink pilot frequency time slot signal inference, which comprises an estimated interference signal acquisition module and an interference elimination module. The present invention can simply and effectively eliminate interference of the uplink pilot frequency signals and improve performance of a base station to detect an uplink synchronous sequence.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a method and device for eliminating interference of downlink pilot time slot signals. Background technique [0002] TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) technology is a flexible combination of the three basic transmission modes of FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access) and CDMA (Code Division Multiple Access), one of its basic characteristics In the TDD (Time Division Duplex) mode, the working mode of transmitting the basic TDMA burst pulse in the periodically repeated time frame is adopted, and the uplink and downlink are alternately performed on the same carrier by periodically switching the transmission direction. link transmission. [0003] As shown in Figure 1, the physical channel of TD-SCDMA system adopts four layers of structure: wireless frame, subframe, time slot and code. A wireless frame is 10ms...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B1/707H04J13/02H04B1/7103
Inventor 魏立梅佟学俭
Owner TD TECH COMM TECH LTD
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