Abstract: Determination of an impairment compensation matrix for compensation of impairments in an antenna array is disclosed. A plurality of different combinations of multi-signal transmissions which form at least one null at a respective location of a plurality of locations is determined. Each combination includes a multi-signal transmission that comprises at least two concurrent signal transmissions from at least two antenna subarrays of N antenna subarrays and the respective location. Based on signal characteristics associated with the plurality of different combinations of multi-signal transmissions and an expected signal reception at the plurality of locations, an impairment matrix that identifies an effect of impairments among the N antenna subarrays is determined. The impairment compensation matrix is determined based on the impairment matrix.

Abstract: A forward link transmitter in a sectored cell includes a baseband processor having traditional baseband signal digital processing circuitry in addition to including a digital hybrid matrix (vector and delay compensated transformation module) whose phase and amplitude (vector) and delay may be adjusted to compensate for downstream errors that are introduced and detected by a feedback circuit. Accordingly, the baseband processor, by monitoring an output of an analog hybrid matrix producing modulated and amplified radio frequency (RF) signals just prior to propagation from an antenna, can determine errors produced by the analog circuitry including the analog hybrid matrix and may compensate for the same by introducing an amplitude, phase and delay adjustment (in the digital domain) into output digital waveform signals to compensate for the error introduced downstream to the baseband processor.

Abstract: A digital convertible radio optimizes signal-to-noise ratios by substantially canceling undesired components of a plurality of input data streams present in sector signals in a cellular network. The sector output power is then scaled to optimize the total power at the sector output ports. The input data streams are cross-correlated with each other and with digital representations of the sector signals to produce a plurality of cross-correlated signals. The plurality of cross-correlated signals is combined to identify the undesired cross-correlated signals. The portion of the undesired signal measurement representing the correlation between the input signal streams are removed using the input signal cross correlation and system transfer function determination. A weighted vector adjustment module produces a plurality of complex weighted vector values that are mixed with the plurality of input data streams.

Abstract: A forward link transmitter in a sectored cell includes a baseband processor having traditional baseband signal digital processing circuitry in addition to including a digital hybrid matrix (vector and delay compensated transformation module) whose phase and amplitude (vector) and delay may be adjusted to compensate for downstream errors that are introduced and detected by a feedback circuit. Accordingly, the baseband processor, by monitoring an output of an analog hybrid matrix producing modulated and amplified radio frequency (RF) signals just prior to propagation from an antenna, can determine errors produced by the analog circuitry including the analog hybrid matrix and may compensate for the same by introducing an amplitude, phase and delay adjustment (in the digital domain) into output digital waveform signals to compensate for the error introduced downstream to the baseband processor.

Abstract: A digital convertible radio optimizes signal-to-noise ratios by substantially canceling undesired components of a plurality of input data streams present in sector signals in a cellular network. The sector output power is then scaled to optimize the total power at the sector output ports. The input data streams are cross-correlated with each other and with digital representations of the sector signals to produce a plurality of cross-correlated signals. The plurality of cross-correlated signals is combined to identify the undesired cross-correlated signals. The portion of the undesired signal measurement representing the correlation between the input signal streams are removed using the input signal cross correlation and system transfer function determination. A weighted vector adjustment module produces a plurality of complex weighted vector values that are mixed with the plurality of input data streams.

Abstract: A forward link transmitter in a sectored cell includes a baseband processor having traditional baseband signal digital processing circuitry in addition to including a digital hybrid matrix (vector and delay compensated transformation module) whose phase and amplitude (vector) and delay may be adjusted to compensate for downstream errors that are introduced and detected by a feedback circuit. Accordingly, the baseband processor, by monitoring an output of an analog hybrid matrix producing modulated and amplified radio frequency (RF) signals just prior to propagation from an antenna, can determine errors produced by the analog circuitry including the analog hybrid matrix and may compensate for the same by introducing an amplitude, phase and delay adjustment (in the digital domain) into output digital waveform signals to compensate for the error introduced downstream to the baseband processor.