METHOD AND APPARATUS FOR SIGNAL TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM

• US 20110228877A1
• Filed: 11/13/2009
• Published: 09/22/2011
• Est. Priority Date: 11/14/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Han, Seung Hee, Lee, Moon Il
• Granted Patent: US 8,908,793 B2
• Time in Patent Office: Days
• US Class Current: 375/295
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

Provided are a method and an apparatus for signal transmission in a wireless communication system. The apparatus comprises: an information processor for generating a first information sequence based on a first transmission symbol and a first resource index, and a second information sequence based on a second transmission symbol and a second resource index; a reference signal generator for generating a different reference signal depending upon whether a first resource block indicated by the first resource index and a second resource block indicated by the second resource index are the same; and an antenna for transmitting a signal generated based on the first information sequence, the second information sequence, and the reference signal sequence.

Claims

1. A transmitter comprising:

an information processor configured for generating a first information sequence based on a first transmission symbol and a first resource index, and configured for generating a second information sequence based on a second transmission symbol and a second resource index;

a reference signal generator configured for generating a different reference signal sequence depending upon whether a first resource block indicated by the first resource index is identical to a second resource block indicated by the second resource index; and

an antenna for transmitting a signal generated based on the first information sequence, the second information sequence, and the reference signal sequence.

2. The transmitter of claim 1, wherein if the first resource block is different from the second resource block, the reference signal generator is configured for generating a first reference signal sequence based on the first resource index, and configured for generating a second reference signal sequence based on the second resource index.

3. The transmitter of claim 1, wherein if the first resource block is identical to the second resource block, the reference signal generator is configured for generating a third reference signal sequence based on the first resource index.

4. The transmitter of claim 2,

wherein the first information sequence is mapped to an information part of the first resource block, and the first reference signal sequence is mapped to a reference signal part of the first resource block, and

wherein the second information sequence is mapped to an information part of the second resource block, and the second reference signal sequence is mapped to a reference signal part of the second resource block.

5. The transmitter of claim 3,

wherein the first information sequence and the second information sequence are combined to each other and mapped to an information part of the first resource block, and

wherein the third reference signal sequence is mapped to a reference signal part of the first resource block.

6. The transmitter of claim 1, wherein a resource block indicated by a resource index includes M orthogonal frequency division multiplexing (OFDM) symbols (where M is a natural number greater than of equal to 2), N OFDM symbols out of the M OFDM symbols correspond to an information part to which an information sequence is mapped, and the remaining (M-N) OFDM symbols correspond to a reference signal part to which a reference signal sequence is mapped.

7. The transmitter of claim 1,

wherein a sequence and a resource block are determined from a resource index,

wherein a spread information sequence is generated based on information and the sequence, and

wherein the spread information sequence is mapped to the resource block.

8. The transmitter of claim 7, wherein the sequence is a cyclically shifted sequence.

9. The transmitter of claim 1,

wherein a first sequence, a second sequence, and a resource block are determined from a resource index,

wherein a two-dimensional spread information sequence is generated based on information, the first sequence and the second sequence, and

wherein the two-dimensional spread information sequence is mapped to the resource block.

10. The transmitter of claim 9, wherein the first sequence is a cyclically shifted shift, and the second sequence is an orthogonal sequence.

11. A method for signal transmission performed by a transmitter in a wireless communication system, the method comprising:

generating a first information sequence based on a first transmission symbol and a first resource index, and generating a second information sequence based on a second transmission symbol and a second resource index;

generating a different reference signal sequence depending upon whether a first resource block indicated by the first resource index is identical to a second resource block indicated by the second resource index; and

transmitting a signal generated based on the first information sequence, the second information sequence, and the reference signal sequence.

12. A transmitter comprising:

an information processor configured for generating a first transmission vector and a second transmission vector based on an Alamouti code from a first symbol and a second symbol corresponding to information;

a first antenna configured for transmitting the first transmission vector based on a first resource index and a second resource index, and configured for transmitting a first reference signal generated based on the first resource index; and

a second antenna configured for transmitting the second transmission vector based on the first resource index and the second resource index, and configured for transmitting a second reference signal generated based on the second resource index.

13. A method for signal transmission performed by a transmitter in a wireless communication system, the method comprising:

generating a first transmission vector and a second transmission vector based on an Alamouti code from a first symbol and a second symbol corresponding to information;

transmitting the first transmission vector based on a first resource index and a second resource index through a first antenna;

transmitting the second transmission vector based on the first resource index and the second resource index through a second antenna; and

transmitting a first reference signal generated based on the first resource index through the first antenna, and transmitting a second reference signal generated based on the second resource index through the second antenna.