For construct a high-rate and low-delay Complex Orthogonal Space-Time Block Codes (COSTBC) matrix, this paper presents an iterative design method without linear processing of symbols to generate high-rate and low-delay COSTBC matrix. By the orthogonality of symbols, a simple maximum likelihood-decoding algorithm is used to recover them at the receiver accurately. By the help of computer, the data of the matrix are got. The results of compare the data with that from others matrix shows the matrix is a closed-form design of high-rate and low-delay.
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