Efficient Receiver Scheme for LTE PUCCH

In 3rd. Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, physical uplink control channel (PUCCH) incorporate Reference Signals (RSs) for eNodeB to perform channel estimation. However the RSs in PUCCH formats 2a/2b are related to the transmitted 10th symbol in UE. As a result, the receivers can not have a priori knowledge about the transmitted RSs and perform channel estimation aided by all of the RSs directly. In this work, an efficient low complexity receiver is proposed for PUCCH formats 2a/2b. What's more, it is also practical for other PUCCH formats with all priori-known RSs. As will be shown in our simulation results, remarkable performance gains are obtained for all PUCCH formats.