Crest reduction method and device of broadband signal

A signal and wave peak technology, which is applied in the field of broadband signal wave peak removal, can solve problems such as omission and over-cutting, and achieve effective peak cutting effects, small changes, and high practical value

Active Publication Date: 2014-02-19
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

from figure 2 It can be seen from the figure that the existing digital intermediate frequency peak clipping technology (CFR) PC-CFR is used for peak clipping processing, and there are problems of over clipping and missing clipping.

Method used

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  • Crest reduction method and device of broadband signal
  • Crest reduction method and device of broadband signal
  • Crest reduction method and device of broadband signal

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Embodiment Construction

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0041] In order to realize the purpose of the present invention, the present invention discloses a method for removing peaks of broadband signals, combining image 3 As shown, the method includes the following steps:

[0042] S301: After completing the physical layer phase rotation of the respective frequency bands on the physical layer of the multi-carrier signals of the first frequency band and the second frequency band, digital intermediate frequency filtering is performed, and after the spectrum shaping of the signals of the respecti...

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Abstract

The embodiment of the invention provides a crest reduction method of a broadband signal. The method comprises the following steps: multi-carrier signals in first and second frequency bands are subjected to digital intermediate-frequency filter after completing physical layer phase rotation at each frequency bands in a physical layer, and spectrums are moved to the first and second frequency bands respectively after the spectrums of the signals in the first and second frequency bands are molded respectively; after the moved multi-carrier signals are superposed, the multi-carrier signal superposition is completed in digital intermediate-frequency; and the superposed signals are subjected to multi-band, multi-carrier and multi-mode crest reduction processing crest factor reduction (CFR) operation, and the multi-carrier signals, subjected to crest reduction, are output. The embodiment of the invention also provides a crest reduction device of the broadband signal, which comprises a spectrum moving module, a superposition module and a crest reduction module. According to the method and the device, a multi-carrier multi-band algorithm is acquired, which can adapt to the TD (time division) multi-band crest reduction and be applied to a TD and LTE (long term evolution) mixed platform with effective crest reduction effect without exacerbated ACPR (adjacent channel power ratio), thus having the higher practical value.

Description

technical field [0001] The present invention relates to the field of digital communication, in particular, the present invention relates to a method and a device for removing peaks of broadband signals. Background technique [0002] TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access technology) is one of the third-generation mobile communication space interface technical specifications officially released by ITU, and it has been fully supported by CWTS and 3GPP. TD-SCDMA is a mobile communication technology that integrates the technical advantages of CDMA, TDMA and FDMA, has large system capacity, high frequency spectrum utilization, and strong anti-interference ability. It uses technologies such as smart antenna, joint detection, relay switching, synchronous CDMA, software radio, low chip rate, multiple time slots, variable spread spectrum system, and adaptive power adjustment. [0003] The launch of T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 熊军
Owner DATANG MOBILE COMM EQUIP CO LTD
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