Method, apparatus, and system for transmitting and receiving information of an uncoded channel in an orthogonal frequency division multiplexing system

A base station for transmitting control information in an orthogonal frequency division multiplexing (OFDM) system, the base station comprising:

• a controller configured to:
• spread acknowledgement (ACK) information by applying a code from a set of codes,
• map the spread ACK information to subcarriers in a pattern for increasing diversity gain of the spread ACK information,
• encode other control information based on a channel encoding scheme without spreading, and
• multiplex the spread ACK information mapped to the subcarriers and the encoded other control information;
• and
• a transceiver coupled with the controller and configured to transmit the multiplexed information to at least one terminal.

A method for receiving control information by a terminal in an orthogonal frequency division multiplexing (OFDM) system, the method comprising:

• receiving, by the terminal, information from a base station;
• demultiplexing, by the terminal, the received information to output spread acknowledgement (ACK) information and other control information, the spread ACK information being mapped on subcarriers in a pattern for increasing diversity gain of the spread ACK information;
• despreading, by the terminal, the spread ACK information by applying a code from a set of codes;
• and
• decoding, by the terminal, the other control information based on a channel encoding scheme.

A terminal for receiving control information in an orthogonal frequency division multiplexing (OFDM) system, the terminal comprising:

• a transceiver configured to receive information from a base station;
• and
• a controller coupled with the transceiver and configured to:
• demultiplex the received information to output spread acknowledgement (ACK) information and other control information, the spread ACK information being mapped on subcarriers in a pattern for increasing diversity gain of the spread ACK information,
• despread the spread ACK information by applying a code from a set of codes, and
• decode the other control information based on a channel encoding scheme.