Patent ID: 8149943

Claim:
An MB OFDM system comprising: a coder, responsive to a stream of at least one incoming symbol, to form therefrom a set including a plurality of channel symbols that correspond to each at least one incoming symbol, such that the channel symbols that correspond to each at least one incoming symbol include the incoming symbol, the negative of the incoming symbol, the complex conjugate of an incoming symbol, and a negative of a complex conjugate of an incoming symbol; a plurality of antennas; an output stage configured to: transform one of the two channel symbols that are complex conjugates of one another as the output of a single IFFT and the other of the two channel symbols by a reversal of the index of the output and create OFDM symbols from the transformed symbols using an IFFT such that the two transformed OFDM symbols are copies of each other with inversed indices; translate channel symbols that are not complex conjugates of one another to a time domain, wherein the stream of channel symbols is translated to OFDM symbols; and apply the OFDM symbols to the plurality of antennas to form a plurality of distinct channels over a transmit medium such that a subset of the plurality of OFDM symbols that correspond to an incoming symbol are simultaneously transmitted on the same subcarrier of a different channel of said plurality of distinct channels by a different antenna of said plurality; and a receiver having a single antenna that is adapted to receive and decode signals transmitted by the output stage, wherein the stream is space-time coded for transmission.