Based On The Research Of Mechanism And Detection Technology About BOC Signal

In order to meet a new generation of navigation systems'modern developmental demand, enhancing the new generation of navigation signals, anti-jamming capability and navigation accuracy, a new generation navigation signals which based on the original direct-sequence spread spectrum appended the BOC modulation. BOC modulated signal made the original signal energy which focused on the center carrier frequency splitting to the both sides of the carrier frequency to enhance the signal anti-jamming capability. The BOC signal's application of the next generation navigation system improved system's robustness and the security. The detection technology could not only help the signal demodulation, but also provide technology support to high-speed information processing, electronic reconnaissance, and information countermeasure. Therefore, in order to further establish the control advantages of navigation information and enhance air and space's control capabilities of information, The BOC modulated signal detection had been presented by the article.At present, great deal of methods of DS signal detection had been mentioned by many countries. These methods had certain compatibility and advantages. Different methods to the different signal parameters made an effective estimate. Some signals to the parameter estimation method were very effective, but possibly had to calculate a great deal of complexity and computing. And these methods were still faced with how to achieve a lower signal-to-noise ratio allowance to meet the signal's parameter estimation and other issues. To compare to the DS, scarcely of any methods of BOC signal detection had been studied, either relevant literatures. Therefore, on the basis of deep researching the characters of BOC signal, and combining the traditional methods of DS signal detection, based on the BOC modulating technology, peak space detection, linear equation detection and the correlative accumulation detection had been proposed by this article. The result of simulation indicated that peak space detection, linear equation detection and correlative accumulation detection implemented simply and were efficient to detect the frequency of carrier and subcarrier, and the speed of code.Furthermore, based on the analysis of the BOC signal generation mechanism, and enhancing the practicality of the signal resource, the BOC modulated signal generator module had been designed, which was based on FPGA technology. And the signal generator module supplyed the input signal to verify the BOC detection algorithm effective.