Abstract
We derive optimum power and rate adaptation for maximizing the spectral efficiency based on imperfect channel estimate and subject to average power and instantaneous bit error rate (BER) constraints for multilevel quadrature amplitude modulation (MQAM). The channel estimation method considered is linear minimum mean square error (MMSE) estimation using pilot symbol assisted modulation (PSAM) that is widely used for fading channels. It is shown that the optimum power adaptation is a generalized water pouring strategy and is dependent of the correlation coefficient between channel gain and its estimate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
