Embedded Orthogonal Space-Time Codes for High Rate and Low Decoding Complexity

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The authors propose a new family of high-rate space-time block codes called Embedded Orthogonal Space-time (EOS) codes. The family is parameterized by the number of transmit antennas, which can be any positive integer, and by the rate, which can be as high as half the number of transmit antennas. The proposed codes are based on a new concept called embedding, whereby information symbols of a traditional space-time code are replaced by code-words from a second space-time code.