Data transmission/reception apparatus and method for achieving both multiplexing gain and diversity gain in a mobile communication system using space-time trellis code

An apparatus for receiving data in a mobile communication system which receives through N reception antennas modulated symbol streams transmitted through M transmission antennas from a transmitter, the apparatus comprising:

• a channel estimator connected to each of the N reception antennas, for channel-estimating reception symbol streams output from the N reception antennas;
• an interference suppressor connected to each of the N reception antennas, for eliminating a reception symbol in at least one predetermined position as an interference component from each of reception symbol streams output from the N reception antennas;
• M modulators for modulating each of all information bit streams that can be possibly transmitted from the transmitter, in a predetermined modulation scheme, and outputting modulated symbol streams;
• M puncturers for puncturing at least one modulated symbol in a predetermined position from each of modulated symbol streams output from the M modulators;
• and
• a transmission symbol stream detector for detecting transmission symbol streams transmitted from the transmitter by considering parallel transition based on the reception symbol streams and a hypothetic channel output in a case where modulated symbol streams output from the M puncturers were transmitted through the same channel as a channel estimated by the channel estimator.

A method for receiving data in a mobile communication system which receives through N reception antennas modulated symbol streams transmitted through M transmission antennas from a transmitter, the method comprising the steps of:

• channel-estimating reception symbol streams output from the N reception antennas;
• eliminating a reception symbol in at least one predetermined position as an interference component from each of reception symbol streams output from the N reception antennas;
• modulating each of all information bit streams that can be possibly transmitted from the transmitter, in a predetermined modulation scheme, and outputting M modulated symbol streams;
• puncturing at least one modulated symbol in a predetermined position from each of the M modulated symbol streams;
• and
• detecting transmission symbol streams transmitted from the transmitter by considering parallel transition based on the reception symbol streams and a hypothetic channel output in a case where modulated symbol streams from which at least one modulated symbol was punctured were transmitted through the same channel as the channel-estimated channel.