Widely-Linear Processing for Multi-User MIMO Systems
نویسندگان
چکیده
In many single and multi-user MIMO systems, different sorts of symbol mapping are employed. This is of course based on the modulation schemes and/or the pseudo-correlation of the signals. These can be for instance circularly symmetric or non-circular signals which are transmitted. Conventional linear transceiver processing is optimal for circularly symmetric signals but sub-optimal for non-circular signals. Considering widely linear processing at transceiver, it can be observed as generalization of the conventional linear filtering and making feasible the power reduction of the additive noise and the interferences at the equalizer output and hence providing a performance gain by capitalizing on the statistical redundancies which are exhibited by a non-circular transmitted and/or the received signal. In-phase and quadrature components of non-circular signals are processed linearly and independently without substantially large increment of computational complexity, thus allowing one to improve system performances.
منابع مشابه
Linear Signal Processing for Single/multi-user Mimo Communication Systems over Frequency-selective Channels
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