Name
Abstract | ||
|---|---|---|
Generalized spatial modulation (GSM) is a promising technique that can highly increase the spectral efficiency for ultra-high data rate systems. However, its performance degrades in highly correlated channels such as those in the millimeter wave (mmWave) and sub-Terahertz (sub-THz) bands. GSM conveys information by the index of the activated transmit antenna combination (TAC) and by the M-ary symbols. In conventional GSM, the legitimate TACs are randomly selected, where their number should be a power of 2. In this paper, a simplified EGSM (S-EGSM) based on TAC selection but without instantaneous channel side information (CSI) is proposed for highly correlated channels. Moreover, an efficient Index-to-Bit mapping for spatial bits based on Gray coding is proposed to reduce the spatial bit-error rate (BER) instead of using the normal binary mapping as in conventional GSM. Simulation results show that the proposed TAC selection without instantaneous CSI (S-EGSM) outperforms the existing method by 1.4 dB in highly correlated channels. In addition, the proposed S-EGSM when compared to TAC selection with instantaneous CSI can be considered as a good tradeoff between performance and complexity since it reduces the feedback and real-time computation overhead due to instantaneous TAC selection. Finally, simulation results of gray coding for spatial bits show a performance gain of the order of 1-2 dB in highly correlated channels, and which becomes less significant in case of low spatially correlated channels. |
Year | DOI | Venue |
|---|---|---|
2019 | 10.1109/PIMRCW.2019.8880828 | 2019 IEEE 30th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC Workshops) |
Keywords | DocType | ISSN |
Beyond 5G,millimeter wave (mmWave),Terahertz systems (THz),multiple-input multiple-output (MIMO),generalized spatial modulation (GSM),index modulation,correlated channels,spatial correlation | Conference | 2166-9570 |
ISBN | Citations | PageRank |
978-1-5386-9359-9 | 0 | 0.34 |
References | Authors | |
3 | 6 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Majed Saad | 1 | 3 | 3.06 |
| Feyiz Chris Lteif | 2 | 0 | 0.34 |
| Ali Chamas Al Ghouwayel | 3 | 8 | 6.61 |
| Hussein Hijazi | 4 | 0 | 1.35 |
| Jacques Palicot | 5 | 375 | 51.91 |
| Faouzi Bader | 6 | 288 | 38.05 |