Spatial channel properties and spectral efficiency of blast architecture

TL;DRAbstract

The Bell Labs Layered Space-Time (BLAST) architecture has been recently proposed as an extremely efficient tool for wireless communications in rich multipath environment [1-4]. Using multi-element antenna arrays and signal processing in the spatial dimension, this architecture achieves channel capacity as high as 10-100 times that of traditional architectures in certain applications (indoor communication, local-area networks, cellular systems in large cities etc.). Such a tremendous increase in the channel capacity will stimulate in future, without any doubts, widespread use of such communication systems. The main idea of the BLAST architecture is to exploit rather than suppress multipath propagation. For a classical communication architecture with multi-element antenna arrays, channel capacity (Shannon’s channel capacity limit) depends linearly on the logarithm of n (the number of array elements) and for the BLAST architecture – linearly on n (for uncorrelated spatial paths). Thus, it

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