Apparatus and method for transmitting/receiving signal in a communication system using a plurality of transmit antennas

A method of transmitting a signal in a signal transmitter with a plurality of antennas in a communication system, comprising:

• generating symbols by mapping modulation symbols of channel coded transmission information data using a space time mapping scheme;
• processing the generated symbols to Radio Frequency (RF) symbols;
• and
• transmitting the RF symbols through transmit antennas among the plurality of transmit antennas,
• wherein generating the symbols comprises generating the symbols by mapping the modulation symbols such that the generated symbols corresponding to a coded word are transmitted through a limited number of transmit antennas in each symbol interval time and use all transmit antennas among the symbol interval times of a codeword transmission time interval defined as time required to transmit all the modulation symbols in a channel coded packet.

A signal transmitter with a plurality of antennas in a communication system, comprising:

• a space-time mapper for generating symbols by mapping modulation symbols of channel coded transmission information data using a space-time mapping scheme and providing the generated symbols to Radio Frequency (RF) processors;
• a plurality of RF processors for processing the generated symbols to RF symbols;
• and
• a plurality of switches coupled to the plurality of RF processors, for switching the plurality of RF processors to the plurality of antennas so that signals output from the RF processors are transmitted through the antennas,
• wherein the space-time mapper generates the symbols by mapping the modulation symbols such that the generated symbols are transmitted through a limited number of antennas in each symbol interval time and utilize all transmit antennas during a codeword transmission time interval defined as time required to transmit all the modulation symbols.

A signal transmitter with a plurality of antennas in a communication system, comprising:

• a space-time mapper for generating symbols by mapping modulation symbols of channel coded transmission information data using a space-time mapping scheme and providing the generated symbols to Radio Frequency (RF) processors;
• and
• a plurality of RF processors for processing the generated symbols to RF symbols and providing the RF symbols to antennas,
• wherein the space-time mapper generates the symbols by mapping the channel coded modulation symbols such that the generated symbols are transmitted through a limited number of transmit antennas in each symbol interval and use all transmit antennas among the symbol interval times of a codeword transmission time interval defined as time required to transmit all the modulation symbols.