and forms a stream weighting coefficient by equalizing the noise variance such that for a first stream having a noise variance u03c3 1 and a second stream having a noise variance of u03c3 2 the first stream is scaled by k 1 2 ue89e u03c3 2 u03c3 1 2 u03c3 2 2 and the second stream is scaled by k 2 2 ue89e u03c3 1 u03c3 1 2 u03c3 2 2 application_number US 18574108 A description fig7 a and 7b show examples of stream weight compensation for simo single input multiple output and mimo multiple input multiple output systems respectively the blocks used for fig7 a and 7b which perform identical function include the per receive channel noise estimation 702 which estimates noise variance per channel in the best mode noise estimator 702 performs this estimate based on the packet preamble the noise estimate from preamble may be performed according to the methods described in u s pat no 7 295 144 and u s patent application ser no 11 439 000 which are incorporated in their entirety by reference channel estimator 704 produces the h channel characterization matrix using any method known in the prior art fig7 a shows the signal processing for simo where a plurality of fft output streams carry a single spatial stream.