Method for allocating signals in multi-carrier system
A method for transmitting control signals in a multi-carrier system. A method for arranging pilots in a transmitting side which transmits and receives data using a plurality of sub-carriers includes acquiring transmission data to be transmitted to a receiving side, processing data of a specific region among the transmission data in accordance with hidden pilots for channel estimation of the receiving side, allocating specific radio resources exclusively for the transmission data and dedicated pilots for channel estimation of the receiving side.
1. A method for a transmitter to transmit pilots to a receiver, the method comprising:
transmitting first type pilots to the receiver via one or more transmission antennas using time-frequency resources; and
transmitting second type pilots to the receiver via the one or more transmission antennas using time-frequency resources upon which data is transmitted,
wherein the time-frequency resources are defined by a plurality of sub-carriers in a frequency domain and a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and
wherein different pairs of sub-carriers and OFDM symbols within the time-frequency resources are used for transmitting the first type pilots via each of the one or more transmission antennas;
wherein data is transmitted on the time-frequency resources upon which the second type pilots are transmitted; and
wherein data is not transmitted on the pairs of sub-carriers or OFDM symbols within the time-frequency resources upon which the first type pilots are transmitted.
2. The method as claimed in claim 1 , wherein the first type pilots are allocated in a scattered form.
3. The method as claimed in claim 1 , wherein the first type pilots are allocated in a time division multiplexing (TDM) mode and a scattered form.
4. A method for a receiver to receive pilots from a transmitter, the method comprising:
receiving first type pilots from the transmitter via one or more transmission antennas using time-frequency resources; and
receiving second type pilots from the transmitter via the one or more transmission antennas using time-frequency resources upon which data is received,
wherein the time-frequency resources are defined by a plurality of sub-carriers in a frequency domain and a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and
wherein different pairs of sub-carriers and OFDM symbols within the time-frequency resources are used for receiving the first type pilots via each of the one or more transmission antennas;
wherein data is received on the time-frequency resources upon which the second type pilots are received; and
wherein data is not received on the pairs of sub-carriers or OFDM symbols within the time-frequency resources upon which the first type pilots are received.
5. The method as claimed in claim 1 , wherein the first type pilots are dedicated pilots and the second type pilots are hidden pilots.
6. The method as claimed in claim 4 , wherein the first type pilots are dedicated pilots and the second type pilots are hidden pilots.