Patent ID: 7697621

Claim:
A closed-loop signaling method over multiple channels in a telecommunication system, comprising: obtaining channel condition for each channel in a channel matrix; detecting transmission power loading per channel according to channel condition, wherein estimation of power loadings based on received reference signals is unnecessary; determining rank-ordered channel eigenvalues based on the channel matrix; determining un-quantized power loadings; determining quantized power loadings based on the un-quantized power loadings, wherein determining the quantized power loadings further includes: (a) for i=1, calculating c i =λ 2i−1 /λ 2i , (b) finding a quantized power loading set P=(P 1 , P 2 , . . . , P Nss ), from a set of power-loading sets pre-defined and fixed by a transmitter, with a smallest |c i -d i | where d i =P Nss−2(i−1) /P Nss−2i+1 ; (c) repeating (a) and (b) with i=i+1, if multiple sets of P exist and i<Nss; and decoding a received encoded information bit stream according to the detected power loading per channel.