This paper investigates the capacity region of three-receiver AWGN broadcastchannels where the receivers (i) have private-message requests and (ii) knowthe messages requested by some other receivers as side information. We classifythese channels based on their side information into eight groups, and constructdifferent transmission schemes for the groups. For six groups, we characterizethe capacity region, and show that it improves both the best known inner andouter bounds. For the remaining two groups, we improve the best known innerbound by using side information during channel decoding at the receivers.
展开▼