Configurable Modernized Navigation Signal Generation Method and Performance Analysis

In order to provide higher accuracy performance in navigation and positioning requirements, modernized navigation signals with more complex structure, such as MBOC or AltBOC signal, have been actively researched and used in the modernized GPS system, like emerging Galileo and BD-2 system. For the navigation signal simulator which generates those modernized signals, traditional bipolar BPSK or QPSK signal generation method cannot permit to generate those multi-level signals successfully and different modernized signals flexibly. After analyzing the current public modernized signal structure, a novel configurable signal generation method for generating the modernized navigation signal has been proposed. The amplitude quantization word-length and phase truncation error of the LUT (look-up table) used by the method have been analyzed. Experimental simulation results demonstrate the correctness and efficiency of this new method.