Pilot signal transmitting method, a channel estimation method, apparatus and system for

Example discloses a method of transmitting a pilot signal, a channel estimation method, apparatus and system wherein the present invention, the method comprising: transmitting a pilot signal CPICH1 on a first antenna, transmitting a pilot signal on a second antenna the CPICH2 two; CPICHk1 pilot signal is transmitted on the first antenna k1; first-type terminal is scheduled to determine the presence of the MIMO system, a transmitter antenna on the first pilot signal k1 CPICHk2. Can better reduce interference to the pilot signal legacy terminals, while ensuring first-type terminal MIMO system can well work, but also to ensure the performance of the legacy terminal, and may also effectively reduce the transmission of the pilot Power consumption.