System and method for cutting peak of preprocess discontinuousness allocating multiple carrier waves

A preprocessing and multi-carrier technology, applied in the field of 3G communication, can solve the problems of large hardware overhead, narrow signal bandwidth, high signal data rate, etc., and achieve the effect of low data rate, wide signal bandwidth and easy design

Inactive Publication Date: 2008-09-03
XUZHOU MASTER MECHANICAL TECH CO LTD
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Problems solved by technology

This adds two frequency mixing on the hardware, the hardware overhead is very large, and the data rate of the signal is high when the signal is clipped, the signal bandwidth is ve

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  • System and method for cutting peak of preprocess discontinuousness allocating multiple carrier waves
  • System and method for cutting peak of preprocess discontinuousness allocating multiple carrier waves
  • System and method for cutting peak of preprocess discontinuousness allocating multiple carrier waves

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Embodiment Construction

[0039]The present invention provides a peak-cutting system and method for discontinuously configured multi-carriers in preprocessing. When performing intermediate frequency processing on a baseband carrier, peak-cutting is performed between any two stages of multi-stage interpolation on the baseband carrier.

[0040] This embodiment provides a preprocessing peak clipping system with discontinuous multi-carrier configuration, as shown in Figure 1, the system includes: a shaping filter device, a digital up-conversion device, a peak clipping device, a predistortion device, and a D / A converter And radio frequency channel; Wherein the digital up-conversion device comprises multi-stage interpolation filtering device, in this example, the digital up-conversion device comprises an M times interpolation filter device, an N times interpolation filter device and an L times interpolation filter device; the peak clipping device is located at Between any two-stage interpolation filtering dev...

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Abstract

The invention provides a peak clipping system for pretreating discontinuous arrangement multicarrier and a method thereof. The system includes a figure up-conversion device having multilevel interpolation filter and a peak clipping device, wherein the peak clipping device is arranged between arbitrary two-stage interpolation filter. The method includes carrying through the medium frequency process on the baseband carrier, and processing peak clipping between arbitrary two stages with multilevel interpolation. The project of the invention realizes the single peak clipping on each baseband carrier, thereby the carrier frequency point can be arranged arbitrarily in a certain frequency range when mixing; the peak clipping device is in the middle of the up-conversion channel, with low data rate, wide signal bandwidth, easy design, which can preferably restrain the noise out of the signal range and ensure the near channel leakage power ration of the transmitter without great change.

Description

technical field [0001] The invention relates to the field of 3G (3rd Generation, third generation wireless communication) communication, in particular to a system and method for eliminating peak signal power in the front-end intermediate frequency digital signal processing part of a power amplifier in WCDMA and CDMA2000 communication systems. Background technique [0002] The current 3G wireless communication systems all use QPSK, 8PSK, 16QAM, 64QAM and other modulation methods with high spectrum utilization. These modulation methods modulate the phase and amplitude of the carrier, so the instantaneous power of the output signal will be larger. The fluctuation produces a non-constant envelope modulation signal with a large peak-to-average ratio PAPR (Peak to Average Power Ratio, the ratio of peak power to average power). [0003] In addition, in the cell of the multi-carrier communication system, since the multi-carrier signals to be transmitted will be linearly superimposed...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/03H04B1/707
Inventor 陈永红苟春茂茹洪涛
Owner XUZHOU MASTER MECHANICAL TECH CO LTD
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