Abstract:
In this letter, we propose a novel channel estimation scheme with leakage suppression for orthogonal time frequency and space (OTFS) modulation. In OTFS, data and pilot s...View moreMetadata
Abstract:
In this letter, we propose a novel channel estimation scheme with leakage suppression for orthogonal time frequency and space (OTFS) modulation. In OTFS, data and pilot symbols are placed in the delay-Doppler (DD) domain and spread over the time-frequency (TF) domain. This increases the achievable accuracy in estimating linear time-varying (LTV) channels. Unfortunately, leakage effects reduce the measurement precision significantly. Therefore, we propose a scheme that exploits smoothness regularization in TF to suppress the leakage observed in the DD domain. It allows us to improve the channel estimation accuracy while reducing signaling overhead.
Published in: IEEE Wireless Communications Letters ( Volume: 11, Issue: 6, June 2022)