Compressive channel estimation for universal filtered multi‐carrier system in high‐speed scenarios

Block Pilot Based Channel Estimation and High- Accuracy Signal Detection for GSM-OFDM Systems on High-Speed Railways

“…To deal with ICI, the channel estimation schemes in [12]- [16] adopt comb-style pilot pattern, while the pilots of GSM-OFDM system on HSR cannot be placed as the same pilot pattern, since for a transmit receive antenna pair, only a small portion of subcarriers are activated. With block pilot pattern, the works [17]- [19] design channel estimation schemes for time domain sequenceorthogonal frequency division multiplexing (TDS-OFDM) systems, which use the time domain sequence to guarantee the channel estimation accuracy and cannot be applied in the cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) systems. Besides, for SM systems, the existing channel estimation methods [20], [21] are mainly based on the prediction of the channel coefficient of the next time slot.…”

“…Finally, we obtain the x (i) ad [n] by performing the hard decision process. Thus, the x (i) ad in ( 13) is calculated according to (17) and (20). The detailed steps of the detection scheme are presented in Algorithm 2.…”