Power amplifying module supporting OFDM signal transmission

A technology for power amplification module and signal transmission, which is applied in the field of power amplification modules supporting OFDM signal transmission, can solve problems such as the increase in the price of power amplifiers, and achieve the effect of improving linearity

Inactive Publication Date: 2009-03-25
ST ERICSSON SEMICON BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of power amplifier selection, for various types of power amplifier products, with the increase of the linear index of the power amplifier, the price of the power amplifier will increase sharply in an exponential manner

Method used

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  • Power amplifying module supporting OFDM signal transmission
  • Power amplifying module supporting OFDM signal transmission
  • Power amplifying module supporting OFDM signal transmission

Examples

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Embodiment Construction

[0019] Specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described here are for illustration only, and are not intended to limit the present invention.

[0020] see figure 1 As mentioned above, it is a schematic diagram of a power amplification module supporting OFDM signal transmission in the present invention. The power amplification module 1 includes: a power divider 11 , N power amplifiers (ie power amplifiers) 12 and a combiner 13 . Among them, the power divider 11 is used to divide the radio frequency input signal into N equally divided signals according to the power, wherein N≥2; N power amplifiers are respectively used to amplify N equally divided signals and output N amplified signals , the N power amplifiers are power amplifiers of the same type and all work in the linear region; and a combiner is used to combine N channels of amplified signals into one channel and output it as a radio frequency...

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Abstract

The invention discloses a power amplification module, which comprises a power divider for equally dividing an RF input signal into N signals according to the power, N being equal to or larger than 2; N power amplifiers working in a linear region respectively for amplifying the N signals and outputting N amplified signals; and a mixer for mixing the N amplified signals to one signal and outputting the signal as the RF output signal. The power amplification module can significantly improve the linearity of transmission power and has lower cost.

Description

technical field [0001] The invention relates to a power amplifying structure in a transmitter of a wireless communication system, in particular to a power amplifying module supporting OFDM signal transmission. Background technique [0002] The modulation mode of Orthogonal Frequency Division Multiplexing (OFDM) has many advantages such as high spectrum utilization rate, anti-fading, and anti-intersymbol interference. At present, this technology is being widely used in the field of wireless communication. OFDM symbols are formed by summing multiple independently modulated orthogonal sub-carrier signals. Such a composite signal may produce a high peak-to-average ratio (PAR). When this peak-to-average ratio signal passes through a When the power amplifier (PA) is used, serious distortion will be generated, which will destroy the orthogonality between sub-carriers and generate inter-carrier crosstalk, thereby reducing the quality of OFDM signals. Moreover, when the signal pass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B1/04
Inventor 刘伟傅丹波
Owner ST ERICSSON SEMICON BEIJING
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