This letter focuses on mitigating ambiguity for cosine-phased binary offset carrier (BOC) modulated signals which are used in the global navigation satellite system (GNSS). The main idea is to use the cross-correlation function (CCF) of the received cosine-phased BOC signal with the specifically designed local auxiliary signal to counterbalance the undesired side peaks of the received BOC autocorrelation function (ACF), the final correlation function has only two small positive side peaks which can be rectified by combing with the classical bump jump (BJ) technique easily. The modulated symbol of the local auxiliary signal is derived and simulations show that at the cost of some degradation of detection probability in the acquisition phase the proposed method is better than the traditional BJ method in mitigating the ambiguity for cosine-phased BOC signals, especially when the subcarrier frequency is high and even under multipath interference.

According to the characteristics of nonlinear, close coupling and multiple loops for coke oven collector pressure control systems, a new mixed control method is proposed. Using the variable integral PI control combing with uncoupling control based on relativity analysis, it solved the problem of collector pressure stability control for several coke oven with close coupling characteristics. The algorithm is proved to be useful and dependable in actual system.