采用Alamplitude编码或天线选择的混合FSO/RF通信系统的性能分析
Performance analysis of hybrid FSO/RF communication systems with Alamouti Coding or Antenna Selection
摘要：
提出了一种新型的中继辅助的双跳混合自由空间光/射频（FSO / RF）通信系统。在该系统中，RF信号从两个天线发射，然后通过FSO信道由单天线中继转发。这是第一次，在一个混合的FSO / RF系统的发射机使用Alamplitude编码（AC）或天线选择（AS）的性能进行了研究。FSO链路存在Gamma-Gamma大气湍流，为了更接近实际结果，还考虑了指向误差的影响。首次推导了该系统的误比特率和中断概率的封闭表达式，并通过MATLAB仿真进行了验证。结果表明，在这种结构中，AC和AS方案的性能略有差异。因此，由于AC的更复杂性、功耗和延迟，推荐使用AS。双跳混合FSO / RF系统显著提高了系统的性能和可靠性，特别适合于源和目的地之间无法直接进行RF通信的远程应用。考虑到这些优点，该结构特别适合于具有功率和处理限制的移动通信。
英文摘要：
In this work a novel dual-hop relay-assisted hybrid Free Space Optical / Radio Frequency (FSO / RF) communication system is presented. In this system, RF signal is transmitted from two antennas, and then forwarded by a single antenna relay through FSO channel. This is the first time that performance of using Alamouti Coding (AC) or Antenna Selection (AS) at the transmitter of a hybrid FSO / RF system is investigated. FSO link has Gamma-Gamma atmospheric turbulence, and in order to get closer to the actual results, the effect of pointing error is also considered. For the first time closed-form expressions are derived for Bit Error Rate (BER) and Outage Probability of the proposed system and validated through MATLAB simulations. Results indicate that in this structure, there is slight performance difference between AC and AS schemes. Hence due to more complexity, power consumption and latency of AC, AS is recommended. Dual-hop, hybrid FSO / RF system significantly improves performance and reliability of the system, and is particularly suitable for long-range applications that direct RF communication between source and destination is not possible. Considering these advantages this structure is particularly suitable for mobile communications which has power and processing limitations.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
