Method for reducing peak-to-average power ratio in radar communication integrated system
A peak-to-average power ratio and radar technology, which is applied in the field of signal processing combining radar and communication, can solve the problem of unsatisfactory peak-to-average power ratio, achieve good radar detection performance, obvious effect, and reduce PAPR
Active Publication Date: 2021-10-08
WUHAN UNIV
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Problems solved by technology
[0007] The present invention aims at the deficiency that the effect of reducing the peak-to-average power ratio of the existing constellation expansion method is not ideal, and provides a constellation expansion method with a significant suppression effect to reduce the radar communication integrated system by increasing the number of constellations participating in the expansion and increasing the scope of the expansion area. Moderately high peak-to-average power ratio
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[0053] Due to the excessive PAPR in the integrated radar communication system leads to system performance deterioration, the present invention achieves the purpose of effectively reducing PAPR by increasing the expandable area and increasing the number of constellations participating in the expansion, and can improve the system PAPR performance and bit error rate (Bit Error Ratio, BER) performance is an effective compromise without affecting the radar detection performance of the system.
[0054] Below will combine the appended in the embodiment of the present invention Figure 1-6 , to describe the specific technical solution of the present invention clearly and in detail. The described embodiments are only some of the embodiments of the invention.
[0055] in such as figure 1 In the system shown, the transmitting end generates 3000 OFDM symbols, the number of subcarriers is 256, 64QAM modulation, and the radius of the extended area is r=0.11 under the 4 times oversampling ...
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The invention provides a method for reducing a peak-to-average power ratio in a radar communication integrated system. Over-high PAPR in a radar communication integrated system causes reduction of linearity or power efficiency of a radio frequency power amplifier and deterioration of comprehensive performance of the integrated system. In order to solve the problem that the peak-to-average power ratio of a system is too high, the probability of iteration of peak signals with the same or similar subcarrier phases can be reduced based on frequency domain constellation expansion, the peak-to-average power ratio of the system can be effectively reduced through a constellation expansion method of increasing the number of constellations participating in expansion and increasing the range of an expansion area, and the system has good comprehensive performance of an integrated system. The invention discloses a constellation expansion method for reducing a peak-to-average power ratio in a radar communication integrated system, which can obtain different comprehensive performance of the system to meet different engineering requirements by setting different amplitude limiting thresholds and constellation expansion radiuses.
Description
technical field [0001] The invention belongs to the field of signal processing combining radar and communication, and in particular relates to a method for reducing peak-to-average power ratio in a radar communication integrated system. Background technique [0002] The use of radar has expanded to many civilian applications, including traffic control, remote sensing, automotive cruise control, and collision avoidance. At the same time, the pursuit of ever-increasing speeds in wireless communications has pushed carrier frequencies into frequency bands traditionally allocated to radar systems. With the continuous development of electronic equipment and information systems, spectrum resources are increasingly tight, and the traditional single combat platform obviously cannot meet the current needs. Due to the ever-increasing demand and resource constraints, the coexistence of radar and communication systems has become a research focus in academia and industry. From the persp...
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Login to View More IPC IPC(8): H04L27/26G01S13/86
CPCH04L27/2614G01S13/86
Inventor 万显荣刘燕易建新
Owner WUHAN UNIV