On the capacity and performance of generalized spatial modulation

Lakshmi Narasimhan, T. ; Chockalingam, A. (2015) On the capacity and performance of generalized spatial modulation IEEE Communications Letters, 20 (2). pp. 252-255. ISSN 1089-7798

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Related URL: http://dx.doi.org/10.1109/LCOMM.2015.2497255


Generalized spatial modulation (GSM) uses N antenna elements but fewer radio frequency (RF) chains (R) at the transmitter. In GSM, apart from conveying information bits through R modulation symbols, information bits are also conveyed through the indices of the R active transmit antennas. In this letter, we derive lower and upper bounds on the the capacity of a (N,M,R)-GSM MIMO system, where M is the number of receive antennas. Further, we propose a computationally efficient GSM encoding method and a message passing based low-complexity detection algorithm suited for large-scale GSM-MIMO systems.

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