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Method for reducing peak-to-average power ratio of filter bank multi-carrier system

A multi-carrier system and filter bank technology, applied in the direction of multi-frequency code system, etc., can solve the problem that the effect is not particularly significant

Inactive Publication Date: 2010-10-20
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

Skrzypczak and Javaudin proposed the overlapping SLM method to reduce the PAPR of the FBMC system in the document "Reduction of the Peak-to-Average Power Ratio for the FBMC Modulation", but the effect is not particularly significant

Method used

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  • Method for reducing peak-to-average power ratio of filter bank multi-carrier system

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Embodiment Construction

[0057] The specific implementation process of the present invention will be described below in conjunction with the accompanying drawings and examples.

[0058] 1. Establish FBMC system model

[0059] Generally, a discrete-time model is used. Discrete-time models of the shaping filter and the transmitted signal are included here. The sampling time T of the FBMC system is known s =1 / (2MF 0 ) = T 0 / (2M)=τ 0 / M. The discrete form p(k) of the shaping filter with length L is

[0060] p ( k ) = T s p ( ( k - L - 1 2 ) T s )

[0061] From formula (1), the discrete form of the transmitted signal s(t) is obtained as

[006...

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Abstract

The invention provides a method for reducing peak-to-average power ratio of a filter bank multi-carrier system, and relates to the field of multi-carrier modulation method. The method comprises the following steps: the analysis of main factors affecting the peak-average power ratio of the FBMC system through the establishment of the FBMC system model and the definition of the peak-average power ratio of the FBMC system, the construction of an FSLM method and the check analysis of Monte Carlo simulation experiments, and is characterized in that: a frame selection mapping method is called as the FSLM method, is a signal non-distortion technique, selects sequences for FBMC signal frames and design frames, constructs FBMC carrier frame signals which have the same information and are independent from one another according to the frame selection sequences, and then selects a frame of symbols allowing the time domain signals to have minimum PAPR, and the method can reduce the PAPR of the FBMC system without distortion, and effectively reduce the PAPR of the FBMC system. The invention can ensure that the requirements of the low peak-to-average power ratio of the system, and further optimize the performance of the system. In practice, the invention can provide certain reference value for the application of Beyond3G, 4G, 802.16 and other communications systems.

Description

technical field [0001] The invention belongs to the field of multi-carrier modulation methods, relates to the design of multi-carrier modulation technology based on a filter bank, in particular to a method for reducing the peak-to-average ratio of a filter bank multi-carrier system. Background technique [0002] Multi-carrier modulation technology MCM is suitable for various communication methods, such as radio frequency communication, optical communication, etc., and is especially suitable for high-speed data transmission. Multi-carrier technology greatly reduces the symbol rate of each sub-carrier by dispersing data to many sub-carriers, so it has high spectrum utilization, higher spectrum efficiency than serial systems, and strong anti-multipath interference and frequency selective fading capabilities. Features. Traditional OFDM is one of the commonly used multi-carrier modulation techniques, which can effectively resist channel multipath fading and pulse interference. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 杜丽平周贤伟高军
Owner UNIV OF SCI & TECH BEIJING
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