Patent ID: 8385462

Claim:
A method implemented in a transmitter used in a communications system, comprising: transmitting to a receiver an indication of one or more selected subbands, using an index defined as I ⁡ ( S ) = ∑ k = 1 M ⁢ ⁢ ( P k k ) , where I(S) is the index, S is a binary sequence denoting said one or more selected subbands, M is the total number of said one or more selected subbands, k is a selection occurrence count for each of said one or more selected subbands, P k is a position count for kth selected subband in the binary sequence where 0≦P k ≦N−1, N being the total number of available subbands, and P 1 <P 2 < . . . <P M , and ( P k k ) denotes a choose function comprising a binomial coefficient, wherein the choose function returns zero in case that P k <k.