METHOD FOR IMPROVING CHANNEL ESTIMATION ACCURACY OF WIRELESS COMMUNICATION SYSTEM

摘要

The invention discloses a method for improving the channel estimation accuracy of a wireless communication system with uplink synchronization or downlink synchronization. The method uses a code block with a interference free window as pilot symbols, or a code block with a interference free window to make spread spectrum for the pilot symbols. The window width of the interference free window is greater than the maximum channel transmission impulse response length, and the codes number with a interference free window is greater than the maximum subscribers number of the system. With this method, during system inherent channel estimation the interference is reduced, so the channel estimation accuracy is improved. At the same time, multiple access interference of the system is suppressed and other noise affection is reduced, so the system performance is improved too. By configuring the system pilot symbols, the system can have more subscribers.