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Method and apparatus for cancellation eliminating common-frequency cell signal inferference based on parallel interference

A technology for interference cancellation and co-frequency cells, applied in the direction of selection devices, communication between multiple stations, radio transmission systems, etc., can solve the problem of unsatisfactory cross-correlation characteristics, inability to effectively suppress, TD-SCDMA system reception performance degradation, etc. question

Active Publication Date: 2007-04-18
上海宣普实业有限有限公司
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Problems solved by technology

When co-channel interference exists, since the spreading code (Spreading Code) and scrambling code (Scrambling Code) used in the TD-SCDMA system are relatively short in length (both are only 16 chips), the difference between the spreading code and scrambling code of different cells The cross-correlation characteristics of the TD-SCDMA system are not ideal, and the traditional Rake receiver or the single-cell joint detection device (Joint Detection, referred to as JD) cannot effectively suppress the influence of the interference signal of the adjacent cell, resulting in the degradation of the receiving performance of the TD-SCDMA system

Method used

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  • Method and apparatus for cancellation eliminating common-frequency cell signal inferference based on parallel interference
  • Method and apparatus for cancellation eliminating common-frequency cell signal inferference based on parallel interference
  • Method and apparatus for cancellation eliminating common-frequency cell signal inferference based on parallel interference

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Embodiment Construction

[0182] The present invention will be described in detail below through optimized specific embodiments with reference to FIGS. 2 to 3 .

[0183] Taking the parallel interference cancellation of one time slot of TD-SCDMA as an example, it is assumed that the received signal of this time slot is r = ( r 1 , r 2 , Λ , r 352 , r 113 BM , r 114 BM , Λ , r 128 BM , r 1 BM , Λ r 128 BM ...

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Abstract

The invention provides provides a parallel interference offset-based same-frequency cell signal interference suppressing method and device, for each cell, reconstructing cell interfering signal by the demodulation symbole generated, based on combined detection; superposing the reconstructed signals of the other interference cells; then removing the superposed value from the received signal and suppressing the effect of the adjacent cell interfercne signals on the received signal of the cell; and according to the parallel progression, repeating the above steps. And the invention can suppress the effect of same-frequncy cell signals and improve the signal receving performance of the cell on the mal-condition that the powers of the adjacent same-frequency cells are higher than that of the cell.

Description

technical field [0001] The present invention relates to a method and device for eliminating co-frequency interference in parallel in a Time Division Synchronous Code-Division Multiple Access (TD-SCDMA) mobile communication system, and specifically relates to a method and device for maximizing A method and a device for parallelly eliminating the influence of co-channel interference signals on useful signals and improving the receiving performance of a receiver. Background technique [0002] In the Direct Spread Code Division Multiple Access (DS-CDMA for short) system, due to the use of CDMA technology, objectively there is the possibility that different cells adopt the same frequency network, which means that a certain base station (NodeB) may be affected by Interference of mobile station (UE) signals in multiple same-frequency adjacent cells, or a certain mobile station may be interfered by signals of multiple same-frequency cell base stations. Due to the different propagat...

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Application Information

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IPC IPC(8): H04B7/26H04B1/10H04B1/707H04B7/01H04Q7/36H04B1/7105H04B1/7107
Inventor 单鸣
Owner 上海宣普实业有限有限公司
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