Sideband information transmission method of SLM (selective mapping method) and PTS (partial transmit sequences) in OFDM (orthogonal frequency division multiplexing) system reduce peak average ratio technology

Abstract

The invention provides a sideband information transmission method of SLM (selective mapping method) and PTS partial transmit sequences) in a OFDM (orthogonal frequency division multiplexing) system reduce peak-to-average power ratio (PAPR) technology. In the sideband information transmission method, the linearity property of IFFT (inverse fast Fourier transform) is used, that is, sideband information and data information are respectively combined into a sideband symbol and a data symbol in a frequency domain; in the data symbol, the position for transmitting data is used for storing data, theposition for transmitting the sideband is set to zero, a data position in the sideband symbol is set to zero, and a sideband position is used for storing the sideband information. After the data symbol and the sideband symbol are respectively subject to IFFT, the data symbol and the sideband symbol are added in the time domain to obtain final time domain information; and a receiving end can extract the sideband information from the known sideband position when the received data is subject to FFT (fast Fourier transform). The sideband information transmission method does not cause the problem of PAPR (peak-to-average power ratio) regeneration if applied to the SLM method, but the sideband information transmission causes parts of peak value to regenerate if applied to the PTS method. The sideband information transmission method can used to preferably lower the PAPR on the premise of guaranteeing error rate performance.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to the transmission of sideband information (SI) in scrambling code technology in peak-to-average ratio reduction (PAPR) technology in OFDM system. It can be applied to the design of sideband transmission based on scrambling code-based peak-to-average ratio reduction technology in OFDM systems, and provides a reliable solution for the realization of sideband transmission in peak-to-average ratio reduction technology. Background technique [0002] With the increasing demand for mobile communications and wireless networks, more advanced wireless transmission technologies are increasingly required. One of the most immediate challenges in the design of high-speed wireless communication systems is to overcome the severe frequency-selective fading brought about by wireless channels. Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexin...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of transmitting sideband information in the existing peak-to-average ratio reduction technology of scrambling codes, the present invention proposes a sideband information transmission method of SLM and PTS in an OFDM system peak-to-average ratio reduction technology in an OFDM system, specifically The technical solution is as follows:

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