On the Capacity and Performance of Generalized Spatial Modulation

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 let...

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Bibliographic Details
Published in:IEEE communications letters 2016-02, Vol.20 (2), p.252-255
Main Authors: Lakshmi Narasimhan, T., Chockalingam, A.
Format: Article
Language:English
Subjects:
combinadics
Encoding
GSM
GSM encoding
GSM-MIMO capacity
low-complexity detection
message passing
MIMO
Modulation
Transmitting antennas
Upper bound
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Summary: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.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2015.2497255