7th International Conference on Communications and Networking in China

Research Article

Average Effective SNR Mapping in LTE-A Uplink

  • @INPROCEEDINGS{10.1109/ChinaCom.2012.6417516,
        author={Fan Jiang and Yun Xue and Bin Jiang and Shi Jin},
        title={Average Effective SNR Mapping in LTE-A Uplink},
        proceedings={7th International Conference on Communications and Networking in China},
        keywords={aesm eesm sc-fdma lte-a uplink},
  • Fan Jiang
    Yun Xue
    Bin Jiang
    Shi Jin
    Year: 2012
    Average Effective SNR Mapping in LTE-A Uplink
    DOI: 10.1109/ChinaCom.2012.6417516
Fan Jiang1,*, Yun Xue1, Bin Jiang1, Shi Jin1
  • 1: Southeast University
*Contact email: fanjiang@seu.edu.cn


Link adaptation is an important technique to achieve high throughput in wireless communication systems. Effective SNR mapping (ESM) algorithm is widely used to provide equivalent SNR, which helps to predict the BLER performance. In this paper, we propose a new ESM - average effective SNR mapping (AESM) algorithm, which is applicable and efficient in LTE-A uplink. Compared with the well-known exponential ESM (EESM) algorithm, AESM not only provides good approximation, but also has lower complexity by getting rid of the calibration procedure, and replacing exponential and logarithmic calculation with simply averaging algorithm. We study the relationship between AESM and EESM, and demonstrate that the value of AESM is greater than that of EESM, and the difference between them is monotonically decreasing and non-decreasing function of the calibration factor and the variance of the mapped SNRs or SINRs, respectively. Finally, we apply AESM to link adaptation in LTE-A uplink, and the results illustrate that effective SNR obtained by AESM is almost the same with EESM and the performance of link adaptation is as good as expected.