Asynchronous Layered Modulation for High Spectral Efficiency Transmission with Lower Sensitivity to Phase Errors

作者：Shao, Shihai^*; Liu, Donglin; Tang, Youxi

来源：Wireless Personal Communications, 2014, 79(2): 1223-1234.

DOI：10.1007/s11277-014-1926-5

• Asynchronous
• Layer
• Modulation
• Phase error
• Spectral efficiency

In this paper, an asynchronous double layered modulation scheme is proposed to achieve high spectral efficiency transmission but has lower sensitivity to phase errors. By intentionally introducing a delay offset to the transmitted signals at each layer, the asynchronous double layered format can use lower level quadrature amplitude modulation (QAM) to achieve the same spectral efficiency as the conventional high level QAM modulation. The error probability performance of the asynchronous double layered format is analyzed in the presence of phase errors and the symbol error rate and the bit error rate are derived in the closed-form expression. Both the theoretical analysis and the simulation results show that the asynchronous layered format can achieve the same spectral efficiency as the conventional high level QAM modulation while has lower sensitivity to the phase errors.

• 出版日期2014-11
• 单位电子科技大学