Granted Patent B2

US 8,744,015 · App. 12/794,589 · Granted Jun 3, 2014

Abstract

Claims (35)

1. A method of receiving signals, said method comprising:

receiving a transmission from a user equipment said user equipment transmission being formed from forward error correction on data bits;

sensing said transmission using a constrained sensing matrix to create a first set of samples, wherein the sensing matrix has a number of non-zero values in each row in addition to a plurality of zero values, the absolute values of said non-zero values do not equal to one;

downsampling said first set of samples to a second set of samples to create a compressively sampled signal, said second set of samples being fewer in number than the first set of samples; and

decoding the user equipment transmission.

2. The method of claim 1 wherein said compressively sampled signal is output to a FEC decoder.

3. A method of wireless communication, said method comprising:

receiving, at one of a base station and a remote sensor, over a wireless channel, a transmission from a user equipment;

down converting and discretizing the received transmission to create a discretized signal;

and correlating the discretized signal with a constrained matrix to produce a set of samples; wherein each row of the constrained matrix is limited to zero values and at least one non-zero value, each non-zero value being greater than or less than one; said constrained matrix is not an identity matrix or a sparse matrix;

performing a probability calculation on the set of samples to transform the set of samples.

4. The method of claim 3 further comprising:

performing a decoder algorithm on the transformed one of the set of samples.

5. The method of claim 3 wherein the probability calculation is a log likelihood ration (LLR).

6. The method of claim 3 wherein said non-zero values in adjacent rows of the constrained matrix formed by a set of vectors are in different columns.

7. The method of claim 4 wherein the decoder algorithm uses a trellis representation of encoder operation.

8. The method of claim 3 wherein the set of samples is sent to a remote central server.

9. The method of claim 3 wherein said correlating and discretizing is performed at a remote sampler.

10. The method of claim 3 wherein said correlating and discretizing is performed at a base station.

11. The method of claim 3 wherein said probability calculation is performed at a remote central server.

12. The method of claim 3 wherein said probability calculation is performed at a remote sampler.

13. The method of claim 3 wherein said probability calculation is performed at a base station.

14. The method of claim 3 wherein said correlating and discretizing is performed at a remote central server.

15. The method of claim 4 wherein said performing a decoder algorithm is performed at a remote central server.

16. An apparatus for receiving wireless communication, said apparatus comprising:

one of a base station and a remote sensor; and

a processor configured to:

receive a transmission signal from a user equipment based on a combination of vectors;

down convert and discretize the received signal to produce a discretized signal;

correlate the discretized signal using a constrained matrix to produce a set of samples, wherein each row of the constrained matrix is limited to zero values and at least one non-zero value, each non-zero value being greater than or less than one; and

perform a probability calculation on the set of samples to select one of the set of samples.

17. The apparatus of claim 16 wherein said processor is configured to perform a decoder algorithm.

18. The apparatus of claim 16 , wherein the constrained matrix is not an identity matrix or trivial sparse matrix.

19. The apparatus of claim 16 , wherein non-zero values on rows adjacent to one another are located in different columns of the constrained matrix.

20. The apparatus of claim 16 , wherein non-zero values on one row of the constrained matrix occupy same columns as non-zero values on another row.

Assignments (6)