Interleaving method for reducing interference by synchronous channel signal

Abstract

The present invention provides an SCH disturbance reduction interleaving method used for a second interleaving process in data transmission. The present invention comprises steps: data to be interleaved is written in an interleaving matrix of an interleaving appliance row by row, wherein the number C2 of columns of the used interleaving matrix satisfies that 15 / C2 is smaller than 15%; the interleaving appliance controls the column exchange of the interleaving matrix; interleaved data is read from the interleaving matrix column by column; preferably, the C2 equals to 120, and when column transformation is carried out, the rules of column transformation which are corresponding to the C2 of 120 are used for column transformation. When the present invention is used, the influence exerted by the signal disturbance of an SCH channel can be reduced, and the link falling rate during high-speed data services (384 Kbps) in WCDMA is decreased. This invention provides a kind of interleaving method for decreasing SCH interference. It is used for second interleaving process of data transmission. It concludes: the need interleaving data are read-in to the interleaving matrix of interleaving machine line by line. The number of columns of the used interleaving matrix C2 meets 15 / C2<15%; the said interleaving matrix are controlled to undertake column exchanging by interleaving machine; the interleaved data are read out from the interleaving matrix column by column. The better C2=120 undertakes column exchanging, which uses the said C2=120 corresponded column exchanging rule. This invention can decrease interference of the SCH channel signal.

Description

technical field [0001] The invention relates to the technical field of wireless channel coding and interleaving, in particular to an interleaving method for reducing the interference of a synchronization channel (SCH) signal. Background technique [0002] In a communication system using WCDMA technology, channels include dedicated channels and common channels, and common channels include common pilot channels and paging channels. The dedicated channels for different user communications and most of the shared channels use the same time period and frequency band. These channels are generally transmitted synchronously, and the downlink channels are distinguished by unrelated "codes", such as orthogonal variable length spread frequency code (OVSF). By using orthogonal codes, the interference between downlink channels is relatively small. [0003] The synchronization channel (SCH) does not use channel codes and scrambling codes for spread spectrum processing, so the cross-corre...

AI Technical Summary

Problems solved by technology

After the 3.4K wireless layer 3 signaling (channel-associated signaling) undergoes a series of channel codec processing, half of the symbols of the signaling fall completely in the area overlapping with the SCH, and the signals falling in the overlapping area follow the previous The analysis was severely interfered by the SCH channel, resulting in too high a bit error in 3.4K signaling, and the link was often dropped

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