# Space-Time Block Codes from Co-ordinate Interleaved Orthogonal Designs

Khan, Md Zafar Ali and Rajan, Sundar B (2002) Space-Time Block Codes from Co-ordinate Interleaved Orthogonal Designs. In: IEEE International Symposium on Information Theory, 2002, June 30 - July 5, Lausanne,Switzerland, p. 275.

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In this paper we present space-time block codes called 'co-ordinate interleaved orthogonal designs' (CIOD). These codes have low decoding complexity; the same as that of the codes from complex orthogonal designs (COD). Rate 1 CIOD exist for two, three and four transmit antennas and rate $\frac{3}{4}$ CIOD exist for five, six, seven and eight transmit antennas while COD exists only for two antennas and generalized COD (GCOD) of rate $\frac{3}{4}$ are known to exist for three and four transmit antennas only. The maximum mutual information of these codes is also calculated.