Improved iterative PTS method for lowering peak-average-ratio in OFDM system

Abstract

The invention relates to an improved iterative PTS method for reducing peak-to-average power ratio in an OFDM system, and the technical proposal is as follows: an improved iterative PTS algorithm is proposed by using an OFDM system model under a frequency selective fading channel, taking the reduction of the complexity of the traditional algorithm as a starting point and taking the traditional partial transfer sequence method PTS for reducing the peak-to-average power ratio (PAPR) as the basis. The improved iterative PTS method is characterized by comprising the following steps: a frame of input OFDM symbols is segmented into V subsequences which are not overlapped mutually, the minimum PAPR is calculated by summing various sub-blocks, sideband information is integrated and the combination with the minimum PAPR is selected for sending. The method can ensure the applicability of a wireless communication system under a wireless fading channel and reduce the PAPR of the OFDM system without the increase of the complexity of the system, thereby realizing balance between the applicability of the system and the complexity of the system, having no need of sending the sideband information additionally and improving the reliability of the system and the availability of the system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an improved iterative PTS method for reducing the peak-to-average ratio in an OFDM system. It can be applied to the design of OFDM system to reduce the peak-to-average ratio. In the continuous improvement of the next-generation wireless communication system, a new iterative PTS method based on the traditional partial transmission sequence method (PTS) to reduce the peak-to-average power ratio (PAPR) is provided for the existing OFDM wireless communication system and a reliable Communication support. It has the characteristics of low complexity and accuracy. Background technique [0002] As people's demand for communication broadband, personalization and mobility is getting higher and higher, Orthogonal Frequency Division Multiplexing (OFDM) technology has been widely used in various wireless communication fields. A major disadvantage of the OFDM system is that i...

AI Technical Summary

Problems solved by technology

This type of technology is a linear process and will not distort the signal, so it does not have the disadvantages of limiting technology

However, the computational complexity of encoding technology is very high, and encoding and decoding are very cumbersome. More importantly, the information rate of this type of technology decreases rapidly, so it is only applicable to the case where the number of subcarriers is relatively small.

Signal scrambling technology, whose core idea is to reduce the probability of occurrence of large PAPR, also uses linear transformation, but this type of technology is relatively complex and requires multiple IFFT operations and search processes

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