Wireless transceiver and wireless transmitting/receiving method and program thereof

• US 20060251149A1
• Filed: 02/18/2004
• Published: 11/09/2006
• Est. Priority Date: 02/18/2003
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Fujii, Masaaki
• Granted Patent: US 8,090,039 B2
• Time in Patent Office: Days
• US Class Current: 375/146
• CPC Class Codes: H04B 1/7097 Interference-related aspects
• CPC Class Codes: H04B 2201/709709 Methods of preventing interference
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/0678 using different spreading codes between antennas code allocation H04J13/16
• CPC Class Codes: H04B 7/0697 using spatial multiplexing
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0056 Systems characterized by the type of code used H04L1/08 takes precedence
• CPC Class Codes: H04L 1/0618 Space-time coding
• CPC Class Codes: H04L 5/026 using code division

Abstract

The present invention is provided with a wireless transceiver and wireless transmitting/receiving method and program thereof capable of improving the robustness against Doppler frequency by containing transmit diversity signals in one spreading region. In the present invention, the transmitter encodes the transmit signals using a space-time matrix and transmits the encoded space-time signals after being spread with different spreading codes, and the receiver de-spreads the received spread signals, in unit of time slot, with the spreading codes corresponding to the respective time slots and then decodes the de-spread signals using the space-time matrix.

Claims

1. A wireless transmitter, comprising:

encoding means for encoding a transmitting signal using a space-time code matrix;

spreading means for spreading space-time code signals of time slots at which space-time encoding outputs based on an encoding operation of encoding means are different, using different spreading codes; and

transmitting means for transmitting the spread signals from the spreading means.

2. The wireless transmitter as set forth in claim 1, wherein the spreading means spreads the space-time code signals of the time slots at which the space-time encoding outputs are different, in a time domain using the different spreading codes.

3. The wireless transmitter as set forth in claim 1, wherein the spreading means spreads the space-time code signals of the time slots at which the space-time encoding outputs are different, in time and frequency domains using the different spreading codes.

4. The wireless transmitter as set forth in claim 1, further comprising:

multiplexing means for multiplexing the spread signals in the same spreading segment,

wherein the transmitting means transmits the multiplexed signals from the multiplexing means.

5. A wireless receiver, comprising:

receiving means for receiving spread signals in which space-time code signals of time slots at which space-time encoding outputs based on an encoding operation using a space-time code matrix are different are spread using different spreading codes;

de-spreading means for de-spreading the spread signals received by the receiving means at predetermined time slots using the spreading codes corresponding thereto; and

decoding means for decoding the de-spread signals from the de-spreading means using the space-time code matrix.

6. A wireless receiver, comprising:

receiving means for receiving spread signals in which space-time code signals of time slots at which space-time encoding outputs based on an encoding operation using a space-time code matrix are different are spread in a time domain using different spreading codes;

de-spreading means for de-spreading the spread signals received by the receiving means at predetermined time slots in the time domain using the spreading codes corresponding thereto; and

decoding means for decoding the de-spread signals from the de-spreading means using the space-time code matrix.

7. A wireless receiver, comprising:

receiving means for receiving spread signals in which space-time code signals of time slots at which space-time encoding outputs based on an encoding operation using a space-time code matrix are different are spread in time and frequency domains using different spreading codes;

de-spreading means for de-spreading the spread signals received by the receiving means at predetermined time slots in the time domain using the spreading codes corresponding thereto;

decoding means for decoding the de-spread signals from the de-spreading means using the space-time code matrix; and

combining means for combining the decoded signals from the decoding means in the frequency domain.

8. A transmitting method, comprising:

encoding transmission signals using a space-time code matrix;

spreading space-time code signals of time slots at which space-time encoding outputs based on the encoding are different, using different spreading codes; and

transmitting the spread signals.

9. A receiving method, comprising:

receiving spread signals in which space-time code signals of time slots at which space-time encoding outputs based on an encoding operation using a space-time code matrix are different are spread using different spreading codes;

de-spreading the received spread signals at predetermined time slots using the spreading codes corresponding thereto; and

decoding the de-spread signals using the space-time code matrix.

10. A transmitting program for executing, on a computer, the processes comprising:

encoding transmission signals using a space-time code matrix;

spreading space-time code signals of time slots at which space-time encoding outputs based on the encoding are different, using different spreading codes; and

transmitting the spread signals.

11. A receiving program for executing, on a computer, the processes comprising:

receiving spread signals in which space-time code signals of time slots at which space-time encoding outputs based on an encoding operation using a space-time code matrix are different are spread using different spreading codes;

de-spreading the received spread signals at predetermined time slots using the spreading codes corresponding thereto; and

decoding the de-spread signals using the space-time code matrix.