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Integer space–time block codes (ICs) do not require the computation of irrational coefficients in the encoding operation, and have a low peak-to-average power ratio. This letter proposes novel ${2 \times 2}$ ICs, which are searched for based on the determinant and trace design criteria for various spectral efficiencies. The code error performance is compared with that of the Harshan IC, Golden code,...
A well known trellis coded modulation using a set partitioning has a shortcoming. Even if a powerful error correcting code is applied to the coded modulation, the smallest squared Euclidean distance between different coded sequences can not exceed the minimum squared Euclidean distance between pairwise signal points mapped by uncoded information bits in any one of the subsets. Ring convolutional codes...
Most space-time codes have been designed so that they have full-rank. However, when the number of receive antennas is large, the minimum trace plays a more important role in performance. In this paper, we propose new space-time codes using the 64QAM signal constellations that are suitable for the situation. The proposed codes are compared the bit error probability to the quasi-orthogonal space-time...
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