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Despiking coefficient update method and device suitable for frequency hopping and power fluctuation system

A technology of power fluctuation and coefficient update, applied in the field of communication, can solve the problem that CPG filter coefficient cannot be updated in real time

Active Publication Date: 2011-03-16
ZTE CORP
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Problems solved by technology

[0010] The present invention provides a method and device for updating peak clipping coefficients suitable for frequency hopping and power fluctuation systems, to solve the problem in the prior art that CPG filter coefficients cannot be updated in real time with fluctuations in frequency points or carrier power

Method used

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  • Despiking coefficient update method and device suitable for frequency hopping and power fluctuation system
  • Despiking coefficient update method and device suitable for frequency hopping and power fluctuation system

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Embodiment Construction

[0053] The specific implementation process of the present invention will be further described in detail below in conjunction with each accompanying drawing.

[0054] see figure 1 , this figure is the implementation schematic diagram of the combined carrier pulse offset and peak clipping device in the prior art. The CPG filter 20 in the figure needs to be updated in real time when the frequency point and carrier power change. The CPG filter coefficient in the current system The update is mostly done by a CPU (central process unit, central processing unit), so it is difficult to adjust the CPG filter coefficients in real time.

[0055] At present, the calculation formula of the CPG filter coefficient in the combined carrier pulse cancellation peak clipping device is as follows:

[0056]

[0057] Among them, h(k) is the CPG filter coefficient, M is the carrier number, g(k) is the prototype filter coefficient, k is the prototype filter order, N is the length of the prototype f...

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Abstract

The invention discloses a despiking coefficient update method and device suitable for a frequency hopping and power fluctuation system. The method comprises the following steps: when any carrier frequency point varies or the relative variation of the carrier power thereof is more than a set value, an offset pulse shaping filter coefficient is generated and the starting signal is updated; the filter power weighted correction factor of each carrier is determined according to the frequency variation of each carrier, the power-weighting calculation of the prototype filter coefficient of each carrier is performed; the cosine signal corresponding to each filter frequency point is generated according to the input frequency control word and phase control word of each carrier, time-domain multiplication-accumulation treatment is performed to the synchronized cosine signal and corrected prototype filter coefficient to obtain the offset pulse shaping filter coefficient; and the normalization, gain compensation and quantification treatment of the offset pulse shaping filter coefficient are performed, and the currently used offset pulse shaping filter coefficient of the system is updated. By adopting the invention, the despiking performance index of the system is matched with the static despiking performance index.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for updating a peak clipping coefficient suitable for frequency hopping and power fluctuation systems. Background technique [0002] Among the current mainstream communication systems, GSM (Global System for Mobile Communications, Global System for Mobile Communications) and CDMA (Code Division Multiple Access, Code Division Multiple Access) systems are typical communication systems using frequency hopping technology. At present, the pulse-offset and peak-shaving algorithm based on combined circuits has incomparable advantages in resources and implementation structure, and has been widely used in various chips and communication systems. However, there is a big problem with this structure that CPG (cancellation pulse generators) shaping filter coefficients cannot be updated in real time with frequency point or carrier power fluctuations, so when applied to frequency h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L25/03H04B1/713
CPCH04B1/713
Inventor 邓英吴丹伟
Owner ZTE CORP
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