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Interpolation filtering method and interpolation filter

A technology of interpolation filtering and filter group, which is applied in the field of communication, can solve problems such as difficult to meet, and achieve the effects of reducing filtering operations, improving efficiency, and avoiding cavitation

Active Publication Date: 2014-08-20
SANECHIPS TECH CO LTD
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AI Technical Summary

Problems solved by technology

It is estimated that the existing software interpolation filter can only provide 6 high-speed user EOL search results on a 732MHz processor, which is difficult to meet the needs of actual systems

Method used

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Embodiment Construction

[0046] Because the software implements upsampling interpolation, a large number of multiplication and addition operations need to consume a huge amount of processor computing time. In addition, due to the complex alignment relationship between source data points and filter coefficients during filtering operations, each calculation of an interpolated data point requires First calculate the interpolation coefficient index corresponding to each source data point, which consumes a lot of additional auxiliary computing resources; and because the corresponding relationship between the filter coefficient and the source data point is unknown during the calculation, the parallelization and streamlining of the multiplication and addition operation cannot be realized. Processor utilization is low. On modern high-performance processors, the traditional software-implemented upsampling interpolation method can only support a very small number of users, which becomes a bottleneck of the syste...

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Abstract

Embodiment of the present invention discloses an interpolation filtering method and interpolation filter, which include setting N filter processing units, wherein the filter processing unit includes a filter data buffering unit, and the filter data buffering unit includes M data buffering sub-units; shifting and inputting source data points one by one to the filter data buffering unit of each filter processing unit in parallel and synchronously, processing filter operation to the source data points in each filter processing unit after the source data points are written to each data buffering sub-unit in each filter data buffering unit, and respectively outputting the operation result of the filter operation for each filter processing unit to an output data buffering unit; shifting and inputting next source data points to the filter data buffering unit of each filter processing unit until processing X times filter operation to each filter processing unit, obtaining X operation results and outputting the operation results, wherein X is the number of the source data points.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an interpolation filtering method and an interpolation filter. Background technique [0002] In the WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access) communication system, it is necessary to perform multipath search on the uplink signal, and perform descrambling and despreading of the uplink signal on the basis of multipath search and subsequent various symbol-level deal with. In order to support higher and higher transmission rates, the physical layer modulation and demodulation technology is also constantly developing, from BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying) to 16QAM (Quadrature Amplitude Modulation) and 64QAM, etc., especially the R8 protocol of 3GPP proposed the BOOSTING (burst transmission) mode, which uses a large number of high-order modulation and demodulation technologies, and these technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7093H04B1/7117
CPCH03H17/02H03H17/0657
Inventor 钟斌官华伯马艳玲
Owner SANECHIPS TECH CO LTD
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