OFDM system with reverse link interference estimation

摘要

A new method of performing interference estimation to allow the data packets to be efficiently delivered in an OFDM system. The interference estimation is performed on average over each frame for each mobile station individually in both frequency and time domains. Based on the estimated interference, the CIR can be determined by the BTS based on channel response estimates made by the BTS, or by the MS based on channel response estimates made for the uplink assuming a symmetrical channel. Numerical results show that the CIR estimation error could be very small if a sub-channel is considered as the minimum transmission unit. In terms of the aggregate throughput, the interference estimation method can provide a significant gain.

主权项

1. A method for estimating a carrier-to-interference ratio (CIR) in an OFDM system, the method comprising:
a mobile station transmitting an OFDM signal to a base station; the mobile station receiving an interference estimate corresponding to the OFDM signal, wherein the interference estimate is received from the base station; the mobile station determining a CIR for at least one sub-carrier and/or for at least on sub-channel for the mobile station using the interference estimate.