3 research outputs found
Improving Generalized Spatial Modulation using Translation Patterns
Generalized spatial modulation (GSM) is a spectral-efficient technique used
in multiple-input multiple-output (MIMO) wireless communications when the
number of radio frequency chains at the transmitter is less than the number of
transmit antenna elements. We propose a family of signal constellations, as an
improvement over GSM, which splits the information bits into three parts, and
encodes the first part into a set of complex symbols, the second part into the
choice of a subset of antennas activated for transmission (as in GSM), and the
third into a translation pattern that offsets the symbols transmitted through
the activated antennas. The nominal coding gain (the ratio of the squared
minimum distance between transmit vectors to the transmit power) of our scheme
is higher than that of GSM by at least 0.86 dB, and this improvement can be as
much as 2.87 dB based on the system parameters. We show that the new scheme has
advantages over other known signal constellations for GSM, in terms of error
performance, nominal coding gain and design flexibility.Comment: Accepted for publication in the IEEE Communications Letters.
Keywords: coding gain, generalized spatial modulation (GSM), MIMO, minimum
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