Pilot Pattern Optimization for Small Data Packet Transmission

摘要

We consider pilot pattern optimization for single user single-input-single-output orthogonal frequency division multiplexing transmission over doubly-selective channels, assuming least squares channel estimation with linear interpolation and extrapolation. Our focus is on small data packet transmission which is typical for machine-type communications. We compare diamond-shaped pilot patterns to rectangular-shaped pilot patterns. We optimize the density and spacing of pilot symbols in both pilot patterns with respect to the constrained capacity and demonstrate that the rectangular pilot pattern can outperform the diamond-shaped pattern in case of small data packet transmission.