Communication signal receiver and an operating method therefor
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorPeter Jakobsson
Life of this patent
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Abstract
A communication signal receiver has a plurality of components. The components are arranged along at least one signal path and comprise a filter (130a-b) for processing a received signal and averaging means (134a-b) for deriving a mean value of the signal. An output of the averaging means (134a-b) is connected to a component (128a-b) located prior to the filter (130a-b) along the signal path, so that the mean value may be selectively fed back to the filter (130a-b).
Claims15
A communication signal receiver for enabling switching from an active mode to a passive mode in order to reduce power consumption, the receiver comprising:
- a plurality of components arranged along at least one signal path, the components along the signal path comprising a filter for processing a received signal and averaging means for deriving a mean value of the signal,
- wherein an output of the averaging means is connected to a selector located prior to the filter along the signal path, and
- control means in communication with the selector, the control means for detecting an event in the signal indicative of a last data symbol and responsive thereto controlling the selector so as to cause the selector to supply the mean value comprising a DC level to the filter in response to detection of the event in the signal so as to enable components arranged prior to the selector along with signal path to be switched from the active mode to the passive mode.
A method of operating a communication signal receiver with a plurality of components arranged along at least one signal path, wherein a received signal is converted to digital form and is processed by at least one digital filter in said plurality of components, in a manner so as to enable switching from an active mode to a passive mode, the method comprising:
- determining an average value comprising a DC level of the signal;
- detecting an event in the signal indicative of a last data symbol;
- and
- in response to detecting said event, feeding said at least one digital filter with said average value comprising the DC level in order to enable switching of component(s) arranged prior to the selector from the active mode to the passive mode in order to reduce power consumption.
A communication signal receiver comprising:
- a plurality of components arranged along at least one signal path, the components along the signal path comprising a digital filter for processing a received signal and averaging means located downstream of the filter for deriving a mean value of the signal,
- wherein an output of the averaging means is connected via a feedback loop to a selector located prior to the filter along the signal path, and
- a controller in communication with the selector, the controller for detecting an event in the signal and causing the selector to supply the mean value to the filter in response to detection of the event in the signal so as to enable components located prior to the selector along the signal path to be switched from an active mode to a passive mode.
A communication signal receiver comprising:
- a plurality of components arranged along at least one signal path, the components along the signal path comprising a filter for processing a received signal and averaging means for deriving a mean value of the signal,
- wherein an output of the averaging means is connected to a selector located prior to the filter along the signal path, and
- control means in communication with the selector, the control means for detecting an event in the signal indicative of a last data symbol and responsive thereto controlling the selector so as to cause the selector to supply the mean value comprising a DC level to the filter in response to detection of the event in the signal.
A method of operating a communication signal receiver with a plurality of components arranged along at least one signal path, wherein a received signal is converted to digital form and is processed by at least one digital filter in said plurality of components, the method comprising:
- determining an average value comprising a DC level of the signal;
- detecting an event in the signal indicative of a last data symbol;
- and
- in response to detecting said event, feeding said at least one digital filter with said average value.
Dependencies are inferred from the claim text.