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An efficient implementation of a maximum-likelihood detector for space-time block coded systems

机译:空时分组编码系统的最大似然检测器的有效实现

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We investigate maximum-likelihood (ML) sequence estimation for space-time block coded systems without assuming channel knowledge. The quadratic form of the ML receiver in this case does not readily lend itself to efficient implementation. However, under quasi-static channel conditions, the likelihood function reduces to a simple form similar to the classical correlation receiver in matrix notation. It also allows the development of a recursive expression that can be easily implemented by a Viterbi-type algorithm with a reasonable complexity. Although the receiver is suboptimum for the nonstatic case, its performance is close to the optimum for a range of signal-to-noise ratios.
机译:我们研究时空块编码系统的最大似然(ML)序列估计,而无需假设信道知识。在这种情况下,ML接收器的二次形式无法轻易实现高效实现。然而,在准静态信道条件下,似然函数简化为类似于矩阵表示法的经典相关接收器的简单形式。它还允许开发递归表达式,该递归表达式可以通过具有合理复杂性的维特比型算法轻松实现。尽管接收机在非静态情况下不是最佳选择,但对于一系列信噪比而言,其性能仍接近最佳。

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