Method for multi-carrier separation and multi-carrier separation apparatus

A separation device and multi-carrier technology, applied in the modulation carrier system, multi-frequency code system, digital transmission system, etc., can solve the problems of high cost of hardware implementation, large average calculation amount of sample points per unit time, etc., and reduce the amount of multiplication operations , avoid frequency offset, reduce the effect of points

Inactive Publication Date: 2009-07-08
ST ERICSSON SEMICON BEIJING
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Problems solved by technology

The main advantage of this method is that the implementation structure is simple, the channel selection filter can be reused, and it is convenient for hardware to be upgraded smoothly, but its disadvantage is that the average calculation amount of the sample points per unit time is very large, which leads to high hardware implementation costs.

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  • Method for multi-carrier separation and multi-carrier separation apparatus
  • Method for multi-carrier separation and multi-carrier separation apparatus
  • Method for multi-carrier separation and multi-carrier separation apparatus

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Embodiment Construction

[0043] The present invention provides a multi-carrier separation method and a multi-carrier separation device, which utilizes cyclic shift in the frequency domain to realize equivalent digital mixing processing, and at the same time achieves equivalent digital frequency mixing processing based on Fast Fourier Transform (FFT, FastFourier Transform) cyclic volume The product equivalently realizes the linear block convolution, and then realizes low-pass filtering by multiplying the frequency domain and the low-frequency window, and finally realizes the effective separation of multiple carriers. Under the premise of ensuring the EVM performance of each carrier after filtering, each The amount of calculation of carrier unit samples is greatly reduced, which in turn can reduce the hardware implementation cost of multi-carrier separation.

[0044] The following multi-carrier separation in the field of wireless technology is taken as an example, and the present invention will be descri...

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Abstract

The present invention provides a multi-carrier separation method and a multi-carrier separation device. The method implements digital mixing by a cycle shift of a frequency domain, implements linear block convolution by a cycle convolution based on Fast Fourier Transform (FFT), further implements a low pass filter by multiplication of the frequency domain and low frequency window; at the same time, the method also employs other various means for reducing unit sampling point calculation amount, which greatly reduces the multi-carrier separated calculation amount, saves the hardware source and reduces the hardware cost.

Description

technical field [0001] The present invention relates to the technical field of multi-carrier communication, in particular to a multi-carrier separation method and a multi-carrier separation device. Background technique [0002] In order to increase the effective rate of the user terminal and maintain the compatibility of wireless or wired access systems, the prior art mostly adopts multi-carrier communication to transmit data. In multi-carrier communication, the combination of multi-carriers at the sending end is relatively simple and easy to implement, while the separation of multi-carriers at the receiving end, especially the efficient separation, is a problem worth studying. [0003] The prior art has provided a multi-carrier separation method based on time domain, such as digital frequency mixing and filtering. The main advantage of this method is that the implementation structure is simple, the channel selection filter can be reused, and it is convenient for hardware t...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/265H04L27/26526
Inventor 李玉宝何林
Owner ST ERICSSON SEMICON BEIJING
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