PAPR Reduction Programs In OFDM Space Ranging System

Ranging technology is a unified space TT&C systems, the key technologies ofwireless communication systems and spacecraft navigation systems will play anincreasingly critical role in the near future. With the evolution of next-generationUnified TT&C systems technology, a new generation of research in the field ofwireless communication systems gradual deepening and upgrading of spacecraftnavigation system, new trends in order to meet the new generation of Unified TT&Csystem change, while meeting the distance precision and scale are not fuzzyinterference ranging indicators, ranging system strengthening, anti-fading channelactual work performance, according to the OFDM time-frequency characteristics, thisproposed OFDM ranging program.OFDM (Orthogonal Frequency Division Multiplexing), the system also has aproblem: the signal emitted by the peak to average power transfer process will be high.This article focuses on the study of the actual subject, focus on the the importantindicators of the previous PAPR of OFDM. In the Matlab environment，do thesimulation experiments. There is the work done in my paper(1) This paper describes the Ranging algorithm in space environment, showingthe multi-carrier modulation and demodulation technology.works to protect and cyclicprefix insertion interval between spectral control system before and after windowingtechnology, as well as sub-carrier interference analysis. And given Matlab simulation.Analysis of the technical principles and the advantages and limitations of radioranging.(2) paper implements OFDM system PAPR reduction issue, noting that the basicprinciple of the system at this stage, research and technical issues facing the twoimportant and hot algorithm to solve this problem-Partial Transmit Sequence Franceand selective mapping method. Through multiple sets of comparative simulationexperiments, analyzed the factors affecting the performance of PAPR reductionmethods. Finally, a simulation process improvements partial OFDM transmissionsequence method, and gives a double PTS method under running Matlab environmentCCDF comparison chart, analyze the reasons for PAPR distribution diagram showingthe experiment proved the correctness of the theory, and pointed out the positive effectof this improvement on the actual project, pointed out the orthogonal frequencydivision multiplexing system in the current realistic value.(3)The improved method for the application of the system to the spatial distance,the process according to the ranging signal system, the device works on the satellitetransponder, to simulate the ranging system block diagram showing a doublemeasuring system PTS OFDM method the PAPR distribution curve, and the experimental results were analyzed. Validated method to suppress the effect of thedouble-PTS OFDM PAPR ranging signal. Because of the special nature of spaceranging system, it is also the main reason of this paper considerations...