Patent ID: 6947502

Claim:
A parameter estimator of a multiuser detection receiver comprising: means for estimating a training sequence location index (τ TS ) in each frame of a received baseband signal; means for calculating an estimate of an average noise power ({circumflex over (σ)}(p) 2 ) in said received baseband signal in accordance with said training sequence location index (τ TS ) input; means for estimating signature waveforms (s K (n,p)) unique to each user in said received baseband signal in accordance with said training sequence location index (τ TS ) input and a transformation matrix ( T r ) input; means, coupled to an output of said estimate of an average noise power calculating means and to an output of said signature waveforms estimating means, for determining a number of active users; and means, coupled to said means for determining the number of active users and to prestored known training sequences for each user, for generating said transformation matrix ( T r ) to send to said signature waveform estimating means.