Receiver, transmitter, communication system, and method of communication
First Claim
1. A receiver, comprising:
- a plurality of antennas configured to receive signals that are obtained by multiplying a plurality of data symbols transmitted over a plurality of data channels using spreading codes for each of the data channels, the data symbol being transmitted over a plurality of sub-carriers having different frequencies;
a spreading code multiplier configured to multiply reception signals received by the plurality of antennas using spreading codes for the data channels corresponding to the reception signals;
a weight controller configured to adjust antenna weights by which a reception signal received by each antenna is to be multiplied, and sub-carrier weights by which a reception signal received over each sub-carrier is to be multiplied;
a weight multiplier configured to multiply the reception signals by the antenna weights and the sub-carrier weights adjusted by the weight controller; and
a combining unit configured to combine the reception signals multiplied by the antenna weights and the sub-carrier weights at the weight multiplier among the antennas and over spreading code duration of the spreading codes.
1 Assignment
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Accused Products
Abstract
A receiver, comprising a plurality of antennas configured to receive signals that are obtained by multiplying a plurality of data symbols transmitted over a plurality of data channels using spreading codes for each of the data channels, the data symbol being transmitted over a plurality of sub-carriers having different frequencies; a spreading code multiplier configured to multiply reception signals received by the plurality of antennas using spreading codes for the data channels corresponding to the reception signals; a weight controller configured to adjust antenna weights by which a reception signal received by each antenna is to be multiplied, and sub-carrier weights by which a reception signal received over each sub-carrier is to be multiplied; a weight multiplier configured to multiply the reception signals by the antenna weights and the sub-carrier weights adjusted by the weight controller; and a combining unit configured to combine the reception signals multiplied by the antenna weights and the sub-carrier weights at the weight multiplier among the antennas and over spreading code duration of the spreading codes.
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Citations
40 Claims
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1. A receiver, comprising:
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a plurality of antennas configured to receive signals that are obtained by multiplying a plurality of data symbols transmitted over a plurality of data channels using spreading codes for each of the data channels, the data symbol being transmitted over a plurality of sub-carriers having different frequencies; a spreading code multiplier configured to multiply reception signals received by the plurality of antennas using spreading codes for the data channels corresponding to the reception signals; a weight controller configured to adjust antenna weights by which a reception signal received by each antenna is to be multiplied, and sub-carrier weights by which a reception signal received over each sub-carrier is to be multiplied; a weight multiplier configured to multiply the reception signals by the antenna weights and the sub-carrier weights adjusted by the weight controller; and a combining unit configured to combine the reception signals multiplied by the antenna weights and the sub-carrier weights at the weight multiplier among the antennas and over spreading code duration of the spreading codes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A transmitter, comprising:
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a divider configured to divide a data symbol transmitted over a plurality of data channels into a plurality of data symbols; a symbol copier configured to copy the plurality of data symbols divided by the divider in a quantity equal to a number of spreading code duration of spreading codes corresponding to the data channels over which the data symbols are transmitted; a spreading code multiplier configured to multiply the data symbols copied by the symbol copier using the spreading codes corresponding to the data channels over which the data symbols are transmitted to provide data signals; a spreading unit configured to spread the data signals multiplied using the spreading codes at the spreading code multiplier over a plurality of sub-carriers having different frequencies for transmitting the data signals; and a guard interval inserting unit configured to insert a guard interval in each of the data signals spread over the plurality of sub-carriers by the spreading unit to prevent interference between the data signals. - View Dependent Claims (17, 18)
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19. A communication system, comprising:
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a transmitter configured to transmit signals obtained by multiplying a plurality of data symbols transmitted over a plurality of data channels using spreading codes for each of the data channels using a plurality of sub-carriers having different frequencies; and a receiver comprising a plurality of antennas configured to receive the signals transmitted by the transmitter, a spreading code multiplier configured to multiply reception signals received by the plurality of antennas using spreading codes for the data channels corresponding to the reception signals, a weight controller configured to adjust antenna weights by which the signal received by each antenna is multiplied, and sub-carrier weights by which a signal received over each sub-carrier is multiplied, a weight multiplier configured to multiply the reception signals by the antenna weights and the sub-carrier weights adjusted by the weight controller; and
a combining unit configured to combine the reception signals multiplied by the antenna weight and the sub-carrier weight at the weight multiplier among the antennas and over spreading code duration of the spreading codes.
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20. A method of communication, comprising:
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receiving signals obtained by multiplying a plurality of data symbols transmitted over a plurality of data channels using spreading codes for each of the data channels and transmitted over a plurality of sub-carriers having different frequencies by a plurality of antennas of a receiver; multiplying reception signals received by the plurality of antennas using spreading codes for the data channels corresponding to the reception signals at the receiver; adjusting an antenna weights by which a signal received by each antenna is to be multiplied and a sub-carrier weights by which a signal received over each sub-carrier is to be multiplied; multiplying the reception signals by the antenna weights and the sub-carrier weights adjusted by the adjusting step; and combining the reception signals multiplied by the antenna weights and the sub-carrier weight among the antennas and over spreading code duration of the spreading codes. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification