Khái niệm cốt lõi
Spatial modulation (SM) and space shift keying (SSK) schemes can enhance the spectral efficiency and bit-error rate performance of LEO satellite-assisted wireless communication systems.
Tóm tắt
The paper explores the application of spatial modulation (SM) and space shift keying (SSK) schemes to enhance the spectral efficiency (SE) and bit-error rate (BER) performance of LEO satellite-assisted wireless communication systems.
The key highlights are:
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The LEO-SM and LEO-SSK schemes are designed to improve the SE of traditional LEO satellite-assisted MIMO wireless systems. This is the first work to explore the performance of these schemes under imperfect channel state information (CSI).
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The analytical performance of SE and detection complexity is presented, revealing interesting insights.
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Monte Carlo simulations show the superiority of the proposed schemes in terms of BER performance and SE compared to traditional LEO satellite-assisted schemes. The results also highlight the trade-offs between the LEO-SM and LEO-SSK schemes.
The analysis underscores the potential of both the LEO-SM and LEO-SSK schemes as viable candidates for future 6G LEO satellite-assisted wireless communication systems, offering improved spectral efficiency and reliability.
Thống kê
The basic path loss is modeled as Lb = FSPL(d, fc) + SF + CL(θE, fc), where FSPL is the free-space path loss, SF is shadow fading, and CL is the clutter loss.
The slant distance d between the satellite and ground terminal is determined by the satellite altitude h0 and elevation angle θE.
The attenuation due to atmospheric gases Lg is dependent on frequency, elevation angle, altitude, and water vapor density.
The small-scale channel is modeled as a shadowed Rician fading channel with both line-of-sight (LoS) and non-LoS (NLoS) components.
The Doppler shift fd in the downlink is calculated based on the relative velocity between the satellite and ground station, and the distance-dependent time delay τ is also considered.
Trích dẫn
"The LEO-SM scheme demonstrates a significantly higher spectral efficiency (SE) compared to both the LEO-SSK and traditional LEO schemes, where the gap between the SE results of the LEO-SM scheme gets wider compared to those of the others as increase of Nt and M, thereby highlighting the superior data rate and throughput of the LEO-SM scheme."
"Regardless, all results and analyses substantiate that both proposed schemes possess ample potential for application in future 6G wireless networks."