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Subcarrier bit and power joint allocation method, device and system

A joint allocation and sub-carrier technology, applied in the field of communication, can solve problems such as deteriorating system performance and inability to guarantee system bit error rate

Inactive Publication Date: 2016-11-30
HUAWEI TECH CO LTD +1
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Problems solved by technology

However, in an actual communication system, the nonlinear characteristics of the nonlinear power amplifier at the transmitting end make the OFDM signal with peak-to-average ratio prone to nonlinear distortion noise, which deteriorates system performance
The existing technology is only a method of wireless resource allocation to reduce the complexity of the algorithm, and cannot guarantee to meet the requirements of the system Bit Error Ratio (BER) while minimizing the total transmission power

Method used

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  • Subcarrier bit and power joint allocation method, device and system
  • Subcarrier bit and power joint allocation method, device and system
  • Subcarrier bit and power joint allocation method, device and system

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Embodiment Construction

[0080]The embodiment of the present invention considers the nonlinear distortion noise generated by the nonlinear power amplifier at the transmitting end in the OFDM system, and proposes a joint bit power allocation algorithm according to the nonlinear distortion noise on each subcarrier. This joint algorithm can not only Ensure the minimum transmit power of the system and meet the requirements of the system BER. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts ...

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Abstract

Embodiments of the present invention provide a subcarrier bit and power joint allocation method, device and system. According to the hardware parameters of the nonlinear power amplifier and the channel noise, the embodiment of the present invention determines the relationship between the signal-to-interference ratio of each subcarrier under nonlinear distortion, the power of the subcarrier and the total power, so as to reduce the nonlinear distortion generated by the nonlinear amplifier Noise is considered, and according to the determined signal-to-interference ratio of each subcarrier under nonlinear distortion and the preset input power, the relationship between the total bit and the bit error rate, the preset total power minimum iterative algorithm is used as Corresponding bits and power are jointly allocated to each subcarrier. Compared with the prior art, the embodiment of the present invention takes into account the influence of the nonlinear distortion of the nonlinear power amplifier, and can better meet the requirements of the system bit error rate (BER) while ensuring the minimum of the total power.

Description

technical field [0001] The present invention relates to communication technology, in particular to a subcarrier bit and power joint allocation method, device and system. Background technique [0002] Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Dkvkskon Multkplexkng, OFDM), as a multi-carrier modulation technology, has the advantages of high spectrum utilization and anti-multipath delay, and has become the core technology of the next generation mobile communication system. OFDM converts the high-speed data stream into serial and parallel, divides the high-speed data stream into multiple low-speed data streams, and then modulates it onto each subcarrier (QPSK or QAM). The allocation algorithm of wireless resources in the OFDM system, such as subcarrier bits and power, is the key to the use of the OFDM system. Resource allocation in OFDM system is an important means to ensure user service quality, improve system capacity and spectrum utilization. The purp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/34H04W72/04H04L27/26
Inventor 冯春燕陈毅雯郭彩丽冯淑兰
Owner HUAWEI TECH CO LTD
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