Efficient User Detection and Channel Estimation for UL CoMP

摘要

A channel estimation system disclosed herein jointly estimates the channels for users transmitting signals allocated overlapping frequency resources in a received composite wideband signal. The channel estimation system may further limit the joint channel estimation process to only locally scheduled UEs and those desired users transmitting detectable desired signals using frequency resources at least partially overlapping the locally scheduled UE's frequency resources. More particularly, a local base station processes the received composite wideband signal to determine which of the potential desired user(s) have transmitted user signals allocated frequency resources that at least partially overlap the frequency resources allocated to locally scheduled users and having a sufficient signal strength and quality to be detectable as present in the received signal. The local base station processes the local and detected desired user signals in the received signal to jointly calculate channel estimates for the corresponding users based on the corresponding reference sequences.