A low peak-to-average ratio wireless optical transmission method using clipping shift

Abstract

Disclosed is a low peak-to-average ratio wireless optical transmission method by means of clipping migration. The method comprises: using the characteristic that one of paired signals of ACO-OFDM time domain signals must be 0, if a positive signal in the paired signals exceeds a set threshold value, clipping same, and putting the clipped quantity in a position of 0 in the paired signals, thereby achieving the action of reducing a PAPR. The present invention is simple to achieve, and can effectively reduce the peak-to-average power ratio of an ACO-OFDM wireless optical communication system, reduce the power consumption of the system, reduce the requirements for the linearity of a power amplifier and an LED lamp, and reduce the nonlinear distortion of a signal in an electrical domain and an optical domain, thereby improving the receiving performance of the system.

Description

technical field

[0001] The invention relates to a low peak-to-average ratio wireless optical transmission method using clipping and shifting, which belongs to the wireless optical communication technology. Background technique

[0002] Wireless Optical Communication (OWC) has attracted the attention of researchers in the field of communication due to its rich and unrestricted spectrum resources, high transmission power can improve the acceptance signal-to-noise ratio, low electromagnetic radiation level, and good security, and has gradually become a research hotspot. . In order to improve the transmission rate of the wireless optical communication system and combat multipath interference, the OFDM modulation method was introduced. The researchers found that OFDM is an effective way to improve the performance of the wireless optical communication system from theory and experiments.

[0003] Since the current wireless optical communication system generally adopts intensity mo...

Examples

Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] A low peak-to-average ratio wireless optical transmission method using clipping and shifting, using the characteristic that one of the paired signals of the ACO-OFDM time domain signal must be 0, if the positive signal in the paired signal exceeds the set The threshold value is clipped, but the eliminated amount is not discarded directly, but placed in the position of 0 in this paired signal, so as to reduce the effect of PAPR, and at the same time, it does not cause too much damage to the communication reliability. big damage. The method is simple to implement, and the improvement of PAPR reduces the system's requirements on the linearity of power amplifiers and LED lamps, reduces the nonlinear distortion of signals in the electrical and optical domains, and improves the system receiving performance. The concrete realization of this method comprises the follow...

technical field

[0001] The invention relates to a low peak-to-average ratio wireless optical transmission method using clipping and shifting, which belongs to the wireless optical communication technology. Background technique

[0002] Wireless Optical Communication (OWC) has attracted the attention of researchers in the field of communication due to its rich and unrestricted spectrum resources, high transmission power can improve the acceptance signal-to-noise ratio, low electromagnetic radiation level, and good security, and has gradually become a research hotspot. . In order to improve the transmission rate of the wireless optical communication system and combat multipath interference, the OFDM modulation method was introduced. The researchers found that OFDM is an effective way to improve the performance of the wireless optical communication system from theory and experiments.

[0003] Since the current wireless optical communication system generally adopts intensity mo...

Examples

Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] A low peak-to-average ratio wireless optical transmission method using clipping and shifting, using the characteristic that one of the paired signals of the ACO-OFDM time domain signal must be 0, if the positive signal in the paired signal exceeds the set The threshold value is clipped, but the eliminated amount is not discarded directly, but placed in the position of 0 in this paired signal, so as to reduce the effect of PAPR, and at the same time, it does not cause too much damage to the communication reliability. big damage. The method is simple to implement, and the improvement of PAPR reduces the system's requirements on the linearity of power amplifiers and LED lamps, reduces the nonlinear distortion of signals in the electrical and optical domains, and improves the system receiving performance. The concrete realization of this method comprises the follow...

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