Granted Patent B2

US 8,532,145 · App. 13/181,376 · Granted Sep 10, 2013

Abstract

Claims (37)

1. A system for isolating individual channels comprising:

a receiver for receiving a transmitted signal and generating an input signal;

a switch coupled to the receiver, the switch receiving the input signal;

a plurality of multipliers, each having an input coupled to the switch and an output, each receiving the input signal from the switch;

a summer coupled to the outputs of each of the plurality of multipliers for generating an output; and

a multiplication factor system for providing multiplication factors to the multipliers, wherein a predetermined frequency channel of the transmitted signal is selected as a function of the multiplication factors.

2. The system of claim 1 wherein the switch selects one of the multipliers so as to provide the input signal to the selected multiplier.

3. The system of claim 2 , wherein the switch can select a different multiplier for each one of a succession of digital samples.

4. The system of claim 3 wherein a sample rate of the output can be less than a sample rate of an input signal.

5. The system of claim 1 wherein each multiplier can process a digital signal.

6. The system of claim 1 further comprising a channel selector system to generate the multiplication factor for the multiplication factor system.

7. The system of claim 1 wherein the receiver receives the transmitted signal and generates the input signal by sampling the received signal at a sampling frequency.

8. A method for isolating individual channels in a broadband signal comprising:

receiving a transmitted signal;

generating a received signal from the transmitted signal;

switching the transmitted signal to a plurality of multipliers;

multiplying the received signal with the plurality of multipliers, each multiplier having an associated multiplication factor;

summing the outputs of the multipliers; and

generating an output signal representing a selected frequency band of the received signal from the summed multiplier outputs.

9. The method of claim 8 further comprising switching the received signal from a first multiplier to a second multiplier.

10. The method of claim 8 further comprising:

converting the received signal into a sequence of digital samples; and

wherein multiplying the received signal with the plurality of multipliers comprises providing successive digital samples to different multipliers.

11. The method of claim 8 further comprising:

receiving channel selection data; and

generating the multiplication factors in response to the channel selection data.

12. The method of claim 8 wherein generating the output signal representing the frequency band of the received signal from the summed multiplier outputs further comprises generating the output signal at a lower sample rate than a sample rate of the received signal.

13. An apparatus for isolating individual signals in a broadband signal comprising:

means for multiplying each of a plurality of inputs by a corresponding scaling factor;

a summer coupled to the outputs of each of the plurality of multipliers to generate an output; and

wherein the scaling factors applied to the inputs select a predetermined channel of a signal.

14. The apparatus of claim 13 further comprising a switch for providing a sequence of samples to the means for multiplying each of the plurality of inputs by the corresponding scaling factor.

15. The apparatus of claim 14 , wherein the plurality of inputs comprises a series of digital samples and comprising a switch for selecting one of a plurality of different multipliers for each successive digital sample.

16. The apparatus of claim 15 wherein a sample rate of the output can be less than a sample rate of the series of digital samples.

17. The apparatus of claim 13 wherein the plurality of inputs comprises a digital signal.

18. The apparatus of claim 13 further comprising means for generating the scaling factors in response to channel selection data.

19. The apparatus of claim 13 further comprising means for receiving a signal and generating the plurality of inputs.

Assignments (8)