Back to results
US 7,889,808 B2Granted
Interpolation based QR decomposition for MIMO-OFDM systems using D-SMC Demodulator with per chunk ordering
AssigneeNEC Laboratories America, Inc.
InventorsNarayan Prasad, Xiaodong Wang, Mohammad Madihian
Life of this patent
Estimating the term…
Abstract
In accordance with the invention, a method includes 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; determining an order for each chunk; and determining, for each chunk, QR decompositions for all its tones according to the determined order.
Claims9
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.
1 more element
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.
2 more elements
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.
1 more element
Dependencies are inferred from the claim text.