Patent ID: 7545874

Claim:
An apparatus for use in a single-input-multiple-output/multiple-input-single-output (SIMO/MISO) transceiver to provide packet data communication with a single-input-single-output (SISO) transceiver by scaling outgoing data signals with a plurality of transmitter channel gain coefficients, comprising: multiplication circuitry responsive to a plurality of outgoing data signals and a plurality of magnitude scaling signals by multiplying respective portions of said plurality of outgoing data signals and respective ones of said plurality of magnitude scaling signals to provide a plurality of product signals, wherein said plurality of magnitude scaling signals represents a plurality of magnitudes of polar coordinates for a plurality of transmitter channel gain coefficients; and coordinate rotation digital computation (CORDIC) circuitry coupled to said multiplication circuitry and responsive to said plurality of product signals and a plurality of phase scaling signals by providing a plurality of scaled data signals for use in producing a plurality of diverse RF signals to be transmitted via a plurality of spatially diverse antenna elements, wherein said plurality of phase scaling signals represents a plurality of phases of said polar coordinates for said plurality of transmitter channel gain coefficients, and said CORDIC circuitry comprises angle remapping circuitry responsive to said plurality of product signals and said plurality of phase scaling signals by providing a plurality of mapped magnitude signals and a plurality of mapped angle signals, wherein respective sets of said pluralities of product and phase scaling signals having phases between π/2 and π radians and phases between π and 3π/2 radians are mapped to corresponding sets of said pluralities of mapped magnitude and mapped angle signals with phases between 0 and π/2 radians and phases between 3π/2 and 2π radians, respectively, wherein said angle remapping circuitry comprises: phase sensing circuitry responsive to said plurality of phase scaling signals by providing one or more control signals and a plurality of angle rotation signals; and signal selection circuitry coupled to said phase sensing circuitry and responsive to said one or more control signals by selecting among said pluralities of product and angle rotation signals to provide said pluralities of mapped magnitude and mapped angle signals; and CORDIC chain circuitry coupled to said angle remapping circuitry and responsive to said pluralities of mapped magnitude and mapped angle signals by providing said plurality of scaled data signals.