Abstract
In this paper, we analyze the performance of space shift keying (SSK) modulation scheme with Euclidean distance based selection combining (ED-SC) at the receiver. This scheme utilizes a single radio frequency (RF) chain receiver that selects one out of $N_{r}$ receiver antennas based on the Euclidean distance between the SSK constellation points. In addition to this, the performance of generalized ED based SC (GED-SC) is also analyzed by utilizing two or more RF chains at the receiver. The closed form expressions for the average bit error probability (ABEP) of ED-SC and GED-SC schemes are derived for two transmit and $N_{r}$ receive antennas. Further, the theoretical ABEP analysis of ED-SC is derived for $N_{t} > 2$ . In addition to this, we also derive the diversity order analysis of ED-SC SSK system for $N_{t} = 2$ . From the diversity order analysis, it can be inferred that the diversity order obtained by the ED-SC SSK system is $N_{r}$ . It is observed from the simulation results that the performance of $2\times 4$ GED-SC SSK system with two and three RF chains is only slightly worse than the optimal detection with $N_{r}=4$ . Since only a single RF chain is utilized for signal reception in ED-SC, the receiver complexity of employing $N_{{RF}}$ RF chains in GED-SC and $N_{r}$ RF chains in optimal detection is greatly reduced. Moreover, the simulation results of the ABEP performance of ED-SC SSK system in imperfect channel state information at the receiver is shown.
Published Version
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