Method of operation of receiver combiner for spatial diversity digital communications
OwnerJ. Eric Saltinventor
Life of this patent
Estimating the term…
Abstract
Apparatus for and method of processing received signals for use with multiple antenna spatial diversity receivers used in a digital communications system. The receiver has received signal phase modulator apparatus for each diversity received signal. The phase modulator provides a two state phase perturbation of zero or pi radians, based on the carrier frequency, which is switched to modulate the phase of the received signal for a fifty percent duty cycle over a symbol period.
Claims22
Received signal processing apparatus for use with a spatial diversity receiver having a first receiving element producing a received signal and at least one physically separated diversity receiving element producing a received diversity signal comprising:
- phase perturbation means for each received diversity signal, to modulate the phase of the received diversity signal selectively by a predetermined phase adjustment in response to a control signal, producing a phase perturbed output signal;
- switching control means to produce a control signal for each phase perturbation means;
- and
- summing means to sum the received signal with all said phase perturbed output signals to produce a combined output signal.
Received signal processing apparatus for use with a spatial diversity receiver having at least two physically separated receiving elements each producing a received signal comprising:
- phase perturbation means for each receiving element to modulate the phase of the received signal selectively by a predetermined phase adjustment in response to a control signal, producing a phase perturbed output signal;
- switching control means to produce a control signal for each phase perturbation means;
- and
- summing means to sum the outputs from all said phase perturbation means to produce a combined signal output.
A method for processing the signals received by a diversity receiver having a first receiving element and at least-one diversity receiving element comprising the steps of:
- periodically perturbing the phase by a predetermined amount of each received signal produced by a diversity receiving element over a symbol period;
- and
- combining all received signals
A method for processing the signals received by a diversity receiver having at least two receiving elements comprising the steps of:
- periodically perturbing each received signal phase by a predetermined amount over a symbol period;
- and
- combining all received signals.
Dependencies are inferred from the claim text.