Power PAR reduction in multi-carrier communication system

A technology of multi-carrier communication and power peak-to-average ratio, applied in modulation carrier system, multiplexing communication, orthogonal multiplexing system, etc. Utilize, enhance the effect of performance

Active Publication Date: 2009-02-04
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The solution in the prior art document [3] thus presents the problem of reduced accuracy

Method used

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  • Power PAR reduction in multi-carrier communication system
  • Power PAR reduction in multi-carrier communication system
  • Power PAR reduction in multi-carrier communication system

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Embodiment Construction

[0057] The purpose of the present invention is to provide a method for reducing PAPR that is more accurate than the above-mentioned solutions in the prior art.

[0058] In the transmitter of the embodiment of the present invention, a predefined subset of the transmitted bits is defined as a candidate bit subset for bit inversion. Bit inversion means that the bit "0" is replaced by the bit "1", and the bit "1" is replaced by the bit "0". According to the embodiment of the present invention, when the PAPR exceeds the threshold value, the transmitter invokes the process of reducing the PAPR and determines whether each bit in the preset subset should be inverted. Whether to invert is determined based on the evaluation of the total PAPR value of the final OFDM signal (symbol).

[0059] Since all carriers can be used to transmit information, compared with the prior art solutions such as carrier reservation methods, the method of using bit inversion to reduce PAPR can reduce the waste of...

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Abstract

An improved Peak to Average Power Ratio (PAPR) reduction in a multi-carrier communication is disclosed. According to the present invention, bit-inversion is performed on a transmitted signal if necessary based on a total PAPR value. If PAPR reduction is determined necessary, a transmitter first determines, while considering said total PAPR value, for each bit in a subset of bits of said encoded information signal if that bit is to be inverted. Then, each bit determined to be inverted is inverted, thereby creating a bit inverted encoded information signal. An indicator is further set to a value indicating that at least one bit has been inverted, and the bit inverted encoded information signal and the indicator are transmitted to a receiver.; If PAPR reduction is determined not necessary, the transmitter instead first sets an indicator to a value indicating that no bit has been inverted, and then transmits said encoded information and the indicator to a receiver.

Description

Technical field [0001] The present invention relates to a method for reducing the possible peak-to-average power ratio (PAPR) in a multi-carrier communication system including a transmitter and a receiver. The method passes through the transmitter according to the total value of the power peak-to-average ratio. The inversion of at least one bit in the coded information signal transmitted to the receiver determines whether it is necessary to reduce the power peak-to-average ratio. [0002] The present invention also relates to a transmitter and a receiver respectively used to reduce the possible power peak-to-average ratio in such a multi-carrier communication system. [0003] The invention also relates to a related communication system. Background technique [0004] The present invention can be applied to all communication links based on multi-carrier modulation such as OFDM modulation and using channel coding. The 3GPP LTE standard being developed today is an example of such a c...

Claims

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Application Information

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IPC IPC(8): H04J11/00
CPCH04L27/2615H04L27/2614
Inventor 雅普·范·德比克奥斯卡·莫里兹布兰尼斯拉夫·波波维奇马蒂尔斯·温斯特姆
Owner HUAWEI TECH CO LTD
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