Method and device for sending pilot signal
View Patent ↗Embodiments of the invention disclose a method and device for sending a pilot signal. The method includes: generating a sub-frame carrying user-specific pilot signals, wherein the sub-frame includes one or more resource blocks, the resource block includes a plurality of resource elements in a symbol-subcarrier plane, locations of the resource elements in the symbol-subcarrier plane are determined by an OFDM symbol and subcarrier, a first part of the user-specific pilots signal are carried by the resource elements of the initial one or more OFDM symbols in the resource block, and a second part of the user-specific pilot signals are carried by resource elements of other OFDM symbols in the resource block; and sending the sub-frame carrying the user-specific pilot signals. The methods and devices are capable of improving the precision of channel estimation.
1. A method for sending a pilot signal, comprising:
generating a resource block carrying user-specific pilot signals; and
sending the user-specific pilot signals;
wherein the resource block comprises a plurality of resource elements in a symbol-subcarrier plane,
wherein locations of the resource elements in the symbol-subcarrier plane are determined by Orthogonal Frequency Division Multiplexing (OFDM) symbols and subcarriers,
wherein a first part of the user-specific pilot signals of an antenna port are carried by resource elements occupying an initial first OFDM symbol and a second OFDM symbol in the resource block, and
wherein a second part of the user-specific pilot signals are carried by resource elements occupying OFDM symbols in the resource block other than the initial first OFDM symbol and the second OFDM symbol.
2. The method of claim 1 ,
wherein an interval of subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals is the same as interval of subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals.
3. The method of claim 1 ,
wherein the subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals are the same as subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals.
4. The method of claim 1 ,
wherein the sending the user-specific pilot signals comprises:
sending the user-specific pilot signals at a first antenna port and at a second antenna port,
wherein one of the following conditions is met:
any OFDM symbols and subcarriers occupied by the resource elements for carrying the user-specific pilot signals sent at the first antenna port are different from any OFDM symbols and subcarriers occupied by the resource elements for carrying the user-specific pilot signals sent at the second antenna port, and
any OFDM symbols and subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals sent at the first antenna port are different from any OFDM symbols and subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals sent at the second antenna port, and any OFDM symbols and subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals sent at the first antenna port are the same as OFDM symbols and subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals sent at the second antenna port.
5. The method of claim 1 ,
wherein sending the sub-frame carrying the user-specific pilot signals comprises:
sending the sub-frame carrying the user-specific pilot signals at a first antenna port and a second antenna port,
wherein locations of the resource elements for carrying the user-specific pilot signals sent at the first antenna port are the same as locations of the resource elements for carrying the user-specific pilot signals sent at the second antenna port; and
wherein the user-specific pilot signals sent at the first antenna port and the user-specific pilot signals sent at the second antenna port are mapped by using different orthogonal codes.
6. A method for receiving a pilot signal, comprising:
receiving a resource block carrying user-specific pilot signals; and
acquiring the user-specific pilot signals;
wherein the resource block comprises a plurality of resource elements in a symbol subcarrier plane,
wherein locations of the resource elements in the symbol subcarrier plane are determined by Orthogonal Frequency Division Multiplexing (OFDM) symbols and subcarriers,
wherein a first part of the user-specific pilot signals of an antenna port are carried by resource elements occupying an initial first OFDM symbol and a second OFDM symbol, and
wherein a second part of the user-specific pilot signals are carried by resource elements occupying OFDM symbols in the resource block other than the initial first OFDM symbol and the second OFDM symbol.
7. The method of claim 6 ,
wherein an interval of subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals is the same as interval of subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals.
8. The method of claim 6 ,
wherein the subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals are the same as subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals.
9. The method of claim 6 ,
wherein the acquiring the user-specific pilot signals comprises:
receiving the user-specific pilot signals sent at a first antenna port and a second antenna port;
wherein one of the following conditions is met:
any OFDM symbols and subcarriers occupied by the resource elements for carrying the user-specific pilot signals sent at the first antenna port are different from OFDM symbols and subcarriers occupied by the resource elements for carrying the user-specific pilot signals sent at the second antenna port, and
any OFDM symbols and subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals sent at the first antenna port are different from OFDM symbols and subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals sent at the second antenna port, and any OFDM symbols and subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals sent at the first antenna port are the same as OFDM symbols and subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals sent at the second antenna port.
10. The method of claim 6 ,
wherein the acquiring the user-specific pilot signals comprises:
receiving the user-specific pilot signals sent at a first antenna port and a second antenna port,
wherein locations of the resource elements for carrying the user-specific pilot signals sent at the first antenna port are the same as locations of the resource elements for carrying the user-specific pilot signals sent at the second antenna port, and
wherein the user-specific pilot signals sent at the first antenna port and the user-specific pilot signals sent at the second antenna port are mapped by using different orthogonal codes.
11. A device, comprising:
a processor configured to generate a resource block carrying user-specific pilot signals; and
a transmitter configured to send the user-specific pilot signals,
wherein the resource block comprises a plurality of resource elements in a symbol-subcarrier plane,
wherein locations of the resource elements in the symbol-subcarrier plane are determined by Orthogonal Frequency Division Multiplexing (OFDM) symbols and subcarriers, and
wherein a first part of the user-specific pilot signals of an antenna port are carried by resource elements occupying an initial first OFDM symbol a second OFDM symbol and wherein a second part of the user-specific pilot signals are carried by resource elements occupying OFDM symbols in the resource block other than the initial first OFDM symbol and the second OFDM symbol.
12. The device of claim 11 ,
wherein an interval of subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals is the same as interval of subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals.
13. The device of claim 11 ,
wherein the subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals are the same as subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals.
14. A device, comprising:
a transceiver configured to receive a resource block carrying user-specific pilot signals; and
a processor configured to acquire the user-specific pilot signals;
wherein the resource block comprises a plurality of resource elements in a symbol-subcarrier plane,
wherein locations of the resource elements in the symbol-subcarrier plane are determined by Orthogonal Frequency Division Multiplexing (OFDM) symbols and subcarriers,
wherein a first part of the user-specific pilot signals of an antenna port are carried by resource elements occupying an initial first OFDM symbol and a second OFDM symbol, and
wherein a second part of the user-specific pilot signals are carried by resource elements occupying OFDM symbols in the resource block other than the initial first OFDM symbol and the second OFDM symbol.
15. The device of claim 14 ,
wherein the subcarriers occupied by the resource elements for carrying the first part of the user-specific pilot signals are the same as subcarriers occupied by the resource elements for carrying the second part of the user-specific pilot signals.