PILOT SIGNAL TRANSMISSION METHOD, CHANNEL ESTIMATION METHOD, AND APPARATUS AND SYSTEM

摘要

A pilot signal transmission method, a channel estimation method, and an apparatus are provided, and the method for a pilot signal transmission includes: transmitting a pilot signal 1 CPICH1 over a first antenna, and transmitting a pilot signal 2 CPICH2 over a second antenna; transmitting a pilot signal CPICHk1 over a k1th antenna; and when it is determined that a terminal of a first category in the MIMO system is scheduled, transmitting a pilot signal CPICHk2 over the k1th antenna. Interference caused by a pilot signal to a traditional terminal is better reduced, performance of the traditional terminal is ensured while the terminal of the first category properly works in the MIMO system, and power consumption for transmitting a pilot signal is effectively reduced.

主权项

1. A pilot signal transmission method, comprising:
in a Multiple-Input Multiple-Output (MIMO) system, transmitting, by a base station, a pilot signal CPICH1 over a first antenna, and transmitting a pilot signal CPICH2 over a second antenna; transmitting a pilot signal CPICHk1 over a k1th antenna, wherein k1 is an integer greater than 2 and smaller than or equal to M; and determining, whether a terminal of a first category in the MIMO system is scheduled within a Transmission Time Interval (TTI), if it is determined that the terminal is scheduled within the TTI, transmitting a pilot signal CPICHk2 over the k1th antenna within the TTI, wherein k2=M−2+k1, and a value of M is determined according to a quantity of antennas of the base station in the MIMO system.