Wireless transceiver and wireless transmitting/receiving method and program thereof
First Claim
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.
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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.
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Citations
11 Claims
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1. A wireless transmitter, comprising:
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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. - View Dependent Claims (2, 3, 4)
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5. A wireless receiver, comprising:
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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.
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6. A wireless receiver, comprising:
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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.
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7. A wireless receiver, comprising:
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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.
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8. A transmitting method, comprising:
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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.
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9. A receiving method, comprising:
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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.
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10. A transmitting program for executing, on a computer, the processes comprising:
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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.
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11. A receiving program for executing, on a computer, the processes comprising:
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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.
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Specification