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With the rapid development of the auto industry, our environment confronts more pressure. Fuzzy adaptive control by seeking the three parameters of PID controller and the relationship between the idle error e and the error change rate ec, make the best adjustment for PID parameters on the gasoline idle speed control, and to keep gasoline well property under the low rotation. The simulation result shows that the fuzzy adaptive PID controller can better meet properties requires of idling control, at the same time, the system has strong anti-disturb capability.

In the forward link of many WCDMA proposals for IMT-2000, pilot symbol aided coherent demodulation (PSACD) is employed. The more pilot symbols there are, the more accurate the channel estimation is, but this will cause more information loss. This paper analyzes this trade-off by deriving the analytical error performance and performance loss due to pilot symbol aided coherent demodulation. Thus we can optimize the space between two neighbor pilot symbols.

A new type of interference cancellation multiuser receiver combining the pilot-aided coherent demodulation method is proposed and analyzed here. According to our theoretical analysis and numeric results, it can be concluded that this new method can improve the system performance greatly with less cost of hardware complexity and process time delay.