Multi-channel csi feedback for lte/lte-a with unlicensed spectrum

Multi-channel channel state information (CSI) is designed, it is disclosed about the use of the unlicensed spectrum Long Term Evolution (LTE) / LTE- Advanced (LTE-A) system. "Based on" CSI process is defined for each channel / carrier. Based CSI process is defined over any of the respective channels in the particular band transmitter is configured to support. Transmission power for such standard CSI process is evenly spread across each such channel. For reporting the CSI for the subset of channels under non-uniform power split home, a user equipment (UE) may apply a different power offset in the calculation of the CSI process. Alternatively, the CSI secondary process, using the non-uniform distribution of power over the different channels in the band may also be defined for reporting the CSI of the sub-set of channels.