Provided are a radio transmission apparatus and method, a radio receiving apparatus and method, a transmitting and receiving method, and a recording medium for use in a mobile communication system according to an Orthogonal Frequency Division Multiplexing-Code Division Multiplexing (OFDM-CDM)-based transmission diversity method. The radio transmitter codes transmission data into a plurality of time-space codes, generates spread signals by respectively mapping a plurality of spread codes and the time-space codes, and transmits the spread signals via a plurality of transmission antennae, each of the spread codes containing a combination of codes whose signs are alternately equal and opposite in units of specific spreading lengths. Accordingly, it is possible to transmit data without a feedback of control information from a radio receiver.