Ofdm-cdma equipment and method
AssigneeGodo Kaisha IP Bridge 1
InventorHiroaki Sudo
Life of this patent
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Abstract
An OFDM signal transmission apparatus is provided, which includes a mapping unit configured to map first signals into N subcarriers and second signals into M subcarrier(s) to form an OFDM signal, wherein N is larger than M. The first signals are each indicating a same bit of retransmission information and the second signals are each indicating a same bit of information other than retransmission information. The OFDM signal transmission apparatus further includes a transmitting unit configured to transmit the formed OFDM signal.
Claims15
A communication device, comprising:
- a receiver, which, in operation:
- receives an orthogonal frequency division multiplexing (OFDM) signal;
- and
- extracts control information and data from the received OFDM signal, the received OFDM signal including:
- modulated retransmission control information and one or more modulated duplicates of the retransmission control information mapped to a plurality of subcarriers, the plurality of subcarriers being discontinuous and uniformly separated from each other in a frequency domain by a first interval;
- and
- modulated data;
- and
- a transmitter coupled to the receiver, wherein the transmitter, in operation, transmits signals.
A communication device, comprising:
- a receiver, which, in operation:
- receives an orthogonal frequency division multiplexing (OFDM) signal;
- and
- extracts retransmission control information from the received OFDM signal, the received OFDM signal including:
- modulated first retransmission control information and one or more modulated duplicates of the first retransmission control information mapped to a plurality of first subcarriers, the plurality of first subcarriers being discontinuous and uniformly separated from each other in a frequency domain by a first interval;
- and
- modulated second retransmission control information and one or more modulated duplicates of the second retransmission control information mapped to a plurality of second subcarriers, the second subcarriers being separated from each other in a frequency domain by the first interval;
- and
- a transmitter coupled to the receiver, wherein the transmitter, in operation, transmits signals.
A communication method, comprising:
- receiving an orthogonal frequency division multiplexing (OFDM) signal;
- extracting control information and data from the received OFDM signal, the received OFDM signal including:
- modulated retransmission control information and one or more modulated duplicates of the retransmission control information mapped to a plurality of subcarriers, the plurality of subcarriers being discontinuous and uniformly separated from each other in a frequency domain by a first interval;
- and
- modulated data;
- and
- transmitting signals.
A communication method, comprising:
- receiving an orthogonal frequency division multiplexing (OFDM) signal;
- extracting retransmission control information from the received OFDM signal, the received OFDM signal including:
- modulated first retransmission control information and one or more modulated duplicates of the first retransmission control information mapped to a plurality of first subcarriers, the plurality of first subcarriers being discontinuous and uniformly separated from each other in a frequency domain by a first interval;
- and
- modulated second retransmission control information and one or more modulated duplicates of the second retransmission control information mapped to a plurality of second subcarriers, the second subcarriers being separated from each other in a frequency domain by the first interval;
- and
- transmitting signals.
Dependencies are inferred from the claim text.