IEEE Transactions on circuits and systems ii-analog and digital signal processing vol:47 issue:4 pages:352-358
The "standard" minimum variance distortionless response (MVDR) beamforming algorithm of McWhirter and Shepherd  is known to suffer from linear roundoff error buildup. An alternative  has been developed based on the so-called inverse UR-updating algorithm, It is amenable to pipelined implementation. I,ut unlike the McWhirter and Shepherd algorithm, it is stable numerically. Here, a variant of the latter algorithm that combines part on the McWhirter and Shepherd procedure into the inverse QR updating scheme is discussed, This makes the derivation of the algorithm less complex compared to the original , Furthermore, by making use of a residual extraction property of the inverse updating procedure, an interesting correspondence of the new MVDR algorithm with so-called 'generalized sidelobe cancellation' is explicitly revealed.