| US 7,590,203 B2 | ||
| Joint symbol, amplitude, and rate estimator | ||
| Thomas P McElwain, Merrimack, N.H. (US) | ||
| Assigned to BAE Systems Information and Electronic Systems Integration Inc., Nashua, N.H. (US) | ||
| Filed on Oct. 15, 2008, as Appl. No. 12/251,571. | ||
| Application 12/251571 is a division of application No. 10/531772, granted, now 7,463,703, previously published as PCT/US03/38190, filed on Nov. 25, 2003. | ||
| Claims priority of provisional application 60/462657, filed on Apr. 14, 2003. | ||
| Prior Publication US 2009/0067553 A1, Mar. 12, 2009 | ||
| Int. Cl. H04B 1/10 (2006.01) | ||
| U.S. Cl. 375—349 [375/341; 714/794] | 9 Claims |
| 1. A turbo-decoding system for joint signal demodulation, comprising:
a data stream from a plurality of users divided into a plurality of observation intervals;
a plurality of symbol processing nodes processing said observation intervals to compute symbol estimates for said data stream
within said observation interval;
a plurality of decoder nodes processing said symbol estimates and producing a plurality of symbol likelihoods;
a plurality of amplitude update nodes processing said symbol likelihoods and calculating a plurality of amplitude update vectors;
and
an amplitude estimator node processing said amplitude update vectors and producing an amplitude estimate update, wherein said
amplitude estimate update is passed back to said processing nodes for iterative processing between said symbol processing
nodes, said decoder nodes, said amplitude update nodes, and said amplitude estimator node until a final condition is obtained.
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