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DFT/IDFT transformation system for 3GPP LTE/4G wireless communication

A wireless communication and IDFT technology, applied in the field of digital signal processing and digital information transmission, can solve the problems of unfavorable design multiplexing and transplantation, DFT algorithm and poor scalability of the transformation system, etc., and achieve good scalability effect

Inactive Publication Date: 2009-06-24
吕正德
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Problems solved by technology

[0018] In view of the above-mentioned defects, the present invention proposes a new type of digital signal processing system to solve the problem of poor scalability of DFT algorithm and transformation system in the prior art, which is not conducive to design multiplexing and transplantation

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  • DFT/IDFT transformation system for 3GPP LTE/4G wireless communication
  • DFT/IDFT transformation system for 3GPP LTE/4G wireless communication
  • DFT/IDFT transformation system for 3GPP LTE/4G wireless communication

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Embodiment Construction

[0044] The core of the present invention is: by performing upsampling rate conversion on the input N point data, the integer power of 2 M=2 LDN point data, and then perform pipeline FFT processing on the M point data, and finally obtain DFT transformed data after frequency domain compensation, data extraction and pre-mapping processing.

[0045] Below in conjunction with accompanying drawing, specifically illustrate the present invention:

[0046] See figure 2 , which is a top-level framework diagram of a DFT transformation system for 3GPP LTE / 4G wireless communication in the present invention. The system includes a pre-processing unit 201, a configurable FFT processing unit 202, a post-processing unit 203 and a control logic unit 204, wherein the pre-processing unit 201, the configurable FFT processing unit 202 and the post-processing unit 203 are connected in sequence, and the control logic unit 204 Then, they are respectively connected to the pre-processing unit 201 , th...

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Abstract

Disclosed is a DFT / IDFT transform system used in 3GPP LTE / 4G wireless communication, which comprises a preceding process unit, a configurable FFT processing unit, a post processing unit and a control logic unit; wherein the preceding processing unit, the configurable FFT processing unit and the post processing unit are connected in sequence, and the control logic unit is respectively connected with the preceding processing unit, the configurable FFT processing unit and the post processing unit. A desirable DFT / IDFT transformation result can be achieved through the up-sampling process of the preceding processing unit, the pipeline FFT transformation of the configurable processing unit, and the frequency domain compensation, the data pick-up and the pre-mapping process of the post processing unit. Therefore, the DFT / IDFT transform system can not only efficiently calculate the DFT / IDFT used on an LTE up-link but also has good expandability to suit the standard of future 4G wireless communication.

Description

technical field [0001] The present invention relates to the technical field of digital signal processing and digital information transmission, in particular to a DFT / IDFT (discrete Fourier transform) suitable for SC-FDMA (single carrier frequency division multiple access) in the uplink of 3GPP LTE and 4G wireless communication. / Inverse Discrete Fourier Transform) transform system. Background technique [0002] The current wireless communication technology is evolving to 4G, among which LTE is a technology for long-term evolution to 4G organized by 3GPP. Although most wireless communication standards currently adopt OFDM (WiFi, 802.16d, FlashOFDM) or OFDMA (802.16e), the uplink transmission mechanism used by LTE is the latest SC-FDMA (Single Carrier Frequency Division Multiple Access). It is called DFT-Spread OFDM (DFT extended OFDM). [0003] Compared with traditional OFDM, SC-FDMA has the following advantages as an uplink transmission mechanism: [0004] 1. The signal h...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B1/69
Inventor 吕正德
Owner 吕正德
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