Intermittent UWB receiver
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsFrederic Hameau, Gilles Masson, Laurent Ouvry
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Abstract
A UWB impulse receiver including an RF stage followed by a baseband processing stage. The baseband processing stage includes a Rake filter including a plurality of time fingers, each finger including an integrator of the baseband signal during an acquisition window, a control module, and a detection module estimating the received symbols from the integration results. During a synchronization phase, the control module drives respective positions of the acquisition windows associated with the different fingers, to scan at a reception interval, the RF stage only operating, in a course of the synchronization phase, during the plurality of acquisition windows.
Claims10
A UWB (Ultra Wide Band) impulse signal receiver, the UWB signal being time-divided into unit intervals of a predetermined duration, a symbol being transmitted over a plurality N of unit intervals, each unit interval including a unit impulse, the UWB signal including a synchronization preamble followed by a payload, the synchronization preamble including a sequence of M identical symbols, the receiver comprising:
- an RF (radio frequency) stage followed by a baseband processing stage, the RF stage being configured to amplify the signal and to carry out a translation into baseband of the amplified signal, wherein the baseband processing stage comprises at least a rake processor comprising a plurality K of time fingers, each time finger configured to carry out a processing of a different acquisition window of time associated with the finger,
- wherein the receiver is further configured to
- estimate at least one received symbol from processing results supplied by the fingers, and
- control respective positions of the acquisition windows within a reception interval, to scan the reception interval in a course of a synchronization phase, the RF stage only operating, in the course of the synchronization phase, during the plurality of acquisition windows,
- wherein N, M, and K are each an integer value greater than 1,
- wherein the processing carried out by each time finger is an integration, each respective time finger integrating the baseband signal in the acquisition window associated with the respective finger, and
- wherein the receiver drives the acquisition windows so that the acquisition windows drift by a predetermined time pitch from one reception interval to a following reception interval.
A method implemented by a UWB (Ultra Wide Band) impulse signal receiver, the UWB signal being time-divided into unit intervals of a predetermined duration, a symbol being transmitted over a plurality N of unit intervals, each unit interval including a unit impulse, the UWB signal including a synchronization preamble followed by a payload, the synchronization preamble including a sequence of M identical symbols, the receiver being configured to implement an RF (radio frequency) stage followed by a baseband processing stage, the baseband processing stage including a rake processor comprising a plurality K of time fingers, a detection module, and a control module, the method comprising:
- amplifying, by the RF stage, the signal and to carry out a translation into baseband of the amplified signal;
- carrying out, at each time finger, a processing of a different acquisition window of time associated with the finger;
- estimating, by the detection module, at least one received symbol from processing results supplied by the fingers;
- controlling, by the control module, respective positions of the acquisition windows within a reception interval, to scan the reception interval in a course of a synchronization phase, the RF stage only operating, in the course of the synchronization phase, during the plurality of acquisition windows,
- wherein N, M, and K are each an integer value greater than 1,
- wherein the processing carried out by each time finger is an integration, each respective time finger integrating the baseband signal in the acquisition window associated with the respective finger, and
- wherein the control module drives the acquisition windows so that the acquisition windows drift by a predetermined time pitch from one reception interval to a following reception interval.
Dependencies are inferred from the claim text.