Interpolation based QR decomposition for MIMO-OFDM systems using D-SMC Demodulator with per chunk ordering

1. A method comprising the steps of:

determining either the number of tones per chunk required to compute per-chunk order responsive to a sub-band bandwidth, a coherence bandwidth and number of chunks or the number of chunks responsive to a sub-band bandwidth and a coherence bandwidth upon receiving a signal from at least one transmitter;

determining an order for each chunk; and

determining for each chunk QR decompositions for a set of tones according to the determined order.

2. The method of claim 1 , wherein said step of determining the order for each one of the chunks comprises using representative tones in the respective said chunks.

3. The method of claim 1 , wherein the set of tones in said step of determining for each chunk QR decompositions, is the set of basis tones.

4. The method of claim 3 , further comprising the step of, for each said chunk, using QR decompositions of the basis tones to interpolate and determine QR decompositions for remaining tones in that chunk.

5. The method of claim 1 , wherein said step of determining said number of chunks is preceded by a step of using a set of basis tones to interpolate and determine channel responses for all remaining tones in the sub-band.

6. The method of claim 1 , wherein said step of determining said order for each chunk comprises of using any one representative tone in respective said chunk.

7. The method of claim 1 , wherein the number of tones required to find the per-chunk order is computed.

8. A method comprising the steps of:

determining the number of tones per chunk required to find a per-chunk order responsive to at least one of sub-band bandwidth and coherence bandwidth and number of chunks upon receiving a signal from at least one transmitter;

determining an order for each said chunk using representative tones in that chunk;

computing, for each said chunk, QR decompositions for all basis tones responsive to the determined order; and

interpolating and determining QR decompositions for remaining tones of each said chunk using QR decompositions of said basis tones.

9. A method comprising the steps of:

using a set of basis tones to interpolate and determine channel responses of remaining allocated tones in the sub-band upon receiving a signal from at least one transmitter;

determining the number chunks responsive to at least one of sub-band bandwidth and coherence bandwidth;

determining an order for each said chunk using any one representative tone in respective said chunk;

computing, for each said chunk, QR decompositions for all tones responsive to the determined order.