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Cascading SLM algorithm for reducing PAPR based on judgment mechanism in radar communication integration system

An algorithm and mechanism technology, which is applied in the field of reducing the peak-to-average power ratio PAPR of the radar communication integrated system, can solve the problem of high computational complexity of the algorithm

Inactive Publication Date: 2019-01-15
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Applying the traditional SLM algorithm and PTS algorithm to the OFDM-LFM-RCI system, it can be found that the problem of excessive PAPR of the system has been significantly improved, but the computational complexity of these two algorithms is relatively large

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  • Cascading SLM algorithm for reducing PAPR based on judgment mechanism in radar communication integration system
  • Cascading SLM algorithm for reducing PAPR based on judgment mechanism in radar communication integration system
  • Cascading SLM algorithm for reducing PAPR based on judgment mechanism in radar communication integration system

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] The embodiment of the present invention adopts the OFDM-LFM-RCI system, adopts 16-QAM as channel coding, the number of subcarriers N is 128, the IDFRFT order p is 0.5, the number of simulated communication bits is 223, and the number of OFDM-LFM symbols is 214, the channel is a Gaussian channel. An integrated system model such as figure 1 shown.

[0037] In order to reduce the computational complexity of the PAPR suppression algorithm, we designed a cascaded SLM algorithm based on the judgment mechanism. The principle diagram of the algorithm is shown in figure 2 shown. The algorithm co...

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Abstract

The invention discloses a judgment-based cascaded selective mapping (Judgment-based Cascaded Selective Mapping, J-Ca-SLM) applied to a radar communication integration system (RCIS) based on judgementmechanism to reduce integration signal peak-to-average power radio (Peak-to-Average Power Ratio, PAPR). The main idea of the algorithm is that performing PAPR suppression processing on multi-carrier modulated integration signals, and processing module structure is two-stage cascaded SLM algorithm modules and judgment mechanism modules between the SLM algorithm modules; directly serving a PAPR value of a stage I output signal as a final output signal of a PAPR suppression module if the PAPR value of the stage I output signal is less than the threshold PAPRth set by the system; and inputting thePAPR value of the stage I output signal into a stage II SLM algorithm module to preform PAPR suppression processing again if the PAPR value of the stage I output signal is not less than the thresholdPAPRth set by the system. Simulation results show that compared with a traditional one-stage SLM algorithm, the J-Ca-SLM algorithm can not only greatly reduce the computational complexity of a traditional SLM algorithm, but also have a better PAPR suppression effect, and does not affect system performances of multi-carrier integration signals.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an algorithm for reducing the peak-to-average power ratio PAPR of an OFDM-LFM-based integrated radar communication system. Background technique [0002] In order to improve the utilization of spectrum resources, the integrated design of multiple devices is a good solution, and the integrated design of radar communication has attracted great attention. [0003] An OFDM-LFM-based radar communication integration (OFDM-LFM-RCI) multi-carrier system has a serious problem that the peak-to-average power ratio PAPR is too high. If the PAPR is too high, the integrated signal will enter the nonlinear region of the power amplifier. The signal is severely distorted, which affects the radar and communication performance of the integrated system. [0004] At present, there are already a large number of PAPR suppression algorithms for multi-carrier transmission systems, mainly clipping fi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/46H04L1/00H04L27/26
CPCH04L1/0006H04L1/0009H04L27/2614G01S13/46
Inventor 邹卫霞赵红
Owner BEIJING UNIV OF POSTS & TELECOMM
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