Granted Patent B2

US 7,756,230 · App. 11/568,981 · Granted Jul 13, 2010

Abstract

Claims (27)

1. A method for synchronizing on a pulsed waveform sequence including at least one pulsed waveform, the method comprising the steps of:

(a) providing an impulse radio receiver including a radio frequency (RF) front end, said RF front end operatively connected to a demodulator, said demodulator operatively connected to a processing unit; and

(b) powering at least a portion of at least one RF component selected from a group consisting of said RF front end and said demodulator, solely during at least one time window sufficient for testing at least one hypothesis regarding timing of the at least one pulsed waveform;

wherein said powering is controlled by said processing unit; and

(c) scanning for and thereby acquiring the pulsed waveform sequence by said processing unit, wherein said acquiring is achieved with a non-negligible probability of a false alarm;

wherein said plurality of hypotheses are tested in parallel, whereby performance of said processing unit is maintained despite the non-negligible probability of a false alarm.

2. The method according to claim 1 , further comprising the step of:

(d) testing said at least one hypothesis wherein said testing includes accumulating at least one signal of the at least one pulsed waveform.

3. The method, according to claim 1 , further comprising the step of

(d) testing said at least one hypothesis wherein said testing includes correlating with the at least one pulsed waveform.

4. The method according to claim 1 , further comprising the step of:

(d) testing said at least one hypothesis wherein said testing includes:

(i) correlating with the at least one pulsed waveform, thereby obtaining a correlation result;

(ii) accumulating said correlation result of the at least one pulsed waveform.

5. The method according to claim 1 , further comprising the step of:

(d) powering at least one other function of said receiver subsequent to said testing.

6. The method, according to claim 1 , wherein said impulse radio receiver is an ultra-wide band receiver.

7. The method, according to claim 1 , wherein the at least one pulsed waveform includes a series of pulses modulated by a binary sequence.

8. The method, according to claim 1 , wherein said at least one hypothesis includes a plurality of hypotheses, and wherein said powering allows testing a plurality of hypotheses in parallel regarding timing of the pulsed waveform sequence.

9. The method according to claim 1 , wherein the pulsed waveform sequence includes a plurality of pulsed waveforms, wherein a time interval between consecutive said pulsed waveforms is uniform.

10. The method according to claim 1 , wherein said scanning is performed every T1 seconds, wherein T1 is not an integral multiple of a time interval between consecutive said pulsed waveforms.

11. The method according to claim 1 , further comprising the step of

(d) storing state variables pertaining to the receiver;

(e) said powering down at least a portion of at least one component of the receiver;

(f) powering up and restoring said at least one component of the receiver;

whereby upon reading said state variables, said powering up and restoring is expedited.

12. The method, according to claim 11 , wherein said restoring includes restoring an oscillator frequency.

Assignments (9)