Abstract: An initial phase of each output signal generated by a plurality of radio frequency (RF) front-end circuits is determined by mixing an input signal with a mixing signal in a mixer of the corresponding RF front-end circuit. To that end, a time difference for each of the plurality of RF front-end circuits is determined by measuring a time difference between a reference signal (common to all of the RF front-end circuits) and the mixing signal of each RF front-end circuit. The initial phase for each output signal is then determined based on the measured time difference for the corresponding RF front-end circuit. Determining the initial phase in this manner accounts for any uncertainty of the phase when the RF front-end circuits are activated, enabling the phase of the corresponding antenna element to be accurately controlled.

Abstract: An initial phase of each output signal generated by a plurality of radio frequency (RF) front-end circuits is determined by mixing an input signal with a mixing signal in a mixer of the corresponding RF front-end circuit. To that end, a time difference for each of the plurality of RF front-end circuits is determined by measuring a time difference between a reference signal (common to all of the RF front-end circuits) and the mixing signal of each RF front-end circuit. The initial phase for each output signal is then determined based on the measured time difference for the corresponding RF front-end circuit. Determining the initial phase in this manner accounts for any uncertainty of the phase when the RF front-end circuits are activated, enabling the phase of the corresponding antenna element to be accurately controlled.

Abstract: An initial phase of each output signal generated by a plurality of radio frequency (RF) front-end circuits is determined by mixing an input signal with a mixing signal in a mixer of the corresponding RF front-end circuit. To that end, a time difference for each of the plurality of RF front-end circuits is determined by measuring a time difference between a reference signal (common to all of the RF front-end circuits) and the mixing signal of each RF front-end circuit. The initial phase for each output signal is then determined based on the measured time difference for the corresponding RF front-end circuit. Determining the initial phase in this manner accounts for any uncertainty of the phase when the RF front-end circuits are activated, enabling the phase of the corresponding antenna element to be accurately controlled.

Abstract: An initial phase of each output signal generated by a plurality of radio frequency (RF) front-end circuits is determined by mixing an input signal with a mixing signal in a mixer of the corresponding RF front-end circuit. To that end, a time difference for each of the plurality of RF front-end circuits is determined by measuring a time difference between a reference signal (common to all of the RF front-end circuits) and the mixing signal of each RF front-end circuit. The initial phase for each output signal is then determined based on the measured time difference for the corresponding RF front-end circuit. Determining the initial phase in this manner accounts for any uncertainty of the phase when the RF front-end circuits are activated, enabling the phase of the corresponding antenna element to be accurately controlled.

Abstract: A method, system, and apparatus for adjusting the headroom for a received signal in a radio receiver when the received signal includes a target signal and an interference signal. An amplifier coupled with the received signal outputs an amplified signal, and the amplification level of the amplifier is set by an amplification control signal. An analog-to-digital converter converts the amplified signal to a digital signal. A first digital filter is used to filter the digital signal at a first attenuation factor and produces a first filter output coupled with the amplification control signal. The first filter output is proportional to the magnitude of the interference signal when the interference signal is greater in magnitude than the target signal. A second digital filter is used to filter the digital signal at a second attenuation factor.

Abstract: A method, system, and apparatus for adjusting the headroom for a received signal in a radio receiver when the received signal includes a target signal and an interference signal. An amplifier coupled with the received signal outputs an amplified signal, and the amplification level of the amplifier is set by an amplification control signal. An analog-to-digital converter converts the amplified signal to a digital signal. A first digital filter is used to filter the digital signal at a first attenuation factor and produces a first filter output coupled with the amplification control signal. The first filter output is proportional to the magnitude of the interference signal when the interference signal is greater in magnitude than the target signal. A second digital filter is used to filter the digital signal at a second attenuation factor.