Data buffer storage method and device for broadband code division multiple access multipath diversity receiver

A broadband code division multiple access and data caching technology, which is applied in the field of mobile communications, can solve problems such as time difference, signal time misalignment, and hardware implementation difficulties, and achieve the effect of reducing complexity and eliminating time difference

Inactive Publication Date: 2003-11-26
STATE GRID BEIJING ELECTRIC POWER +1
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Problems solved by technology

[0005] Although these methods can reduce certain hardware resources and realize multiple multipath parallel demodulation, because the phases of each multipath are different, the signals obtained by the corresponding demodulation subsystem and channel estimation subsystem cannot be aligned in time. There is a time difference, so a certain length of data needs to be stored when performing multipath merging, and the merging cannot be performed until all multipath phase data are included
In this way, when multipa

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  • Data buffer storage method and device for broadband code division multiple access multipath diversity receiver
  • Data buffer storage method and device for broadband code division multiple access multipath diversity receiver
  • Data buffer storage method and device for broadband code division multiple access multipath diversity receiver

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[0024] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0025] on figure 1 The principle block diagram of the shown RAKE receiver has been described above, and will not be repeated here.

[0026] In the WCDMA system, each multipath of the user arrives at the receiving end through a different propagation path and has different propagation delays, resulting in a different phase of each multipath. Therefore, if you want to eliminate this multipath phase during demodulation, The time difference caused by the difference requires the ability to descramble and despread the data corresponding to different multipath phases with the same scrambling code and channel code at the same time. Therefore, a certain amount of input data needs to be stored so that it contains at least all the multipath phase correspondences. The data. If all hardware register resources are used to store these data, more hardware register resources are...

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Abstract

This invention relates to a data buffer storage method for a wide band CDMA multiroute diversity receiver, which uses storing input data by a memory group, a counter generates write-address and write-control signals to fetch data according to the memory read-address generated from the multiroute phase and the write-address to output the data for demodem after rearray to eliminate the time difference of demodem for different multiroute-phase offsets to eliminate multiroute-phase time difference and reduce the complexity of successive process.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a data buffering method and a device thereof during descrambling and despreading of a multi-user multipath diversity (RAKE) receiver in a wideband code division multiple access (WCDMA) system. Background technique [0002] In wideband code division multiple access system, since the signal arrives at the receiving end with different propagation paths, it has different propagation delays, forming a multipath fading channel; at the same time, due to the correlation between the different phase differences of the signal code sequence is very low, and the multipath delay component greater than one chip period is irrelevant, and it appears as a separable path in the model. Therefore, in WCDMA systems, multipath diversity receiving equipment, namely RAKE receiver, is usually used to receive signals. [0003] The RAKE receiver descrambles and despreads the multipaths of different phase...

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Application Information

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IPC IPC(8): H04B1/16H04J13/00
Inventor 陈月峰张玉玺张崇岩
Owner STATE GRID BEIJING ELECTRIC POWER
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