Galileo BOC(1,1) Prototype Receiver Development
Bibliographic record
Abstract
In February 2004, the EU and the US reached an agreement on the baseline signal structure to be used in Galileo. Of particular interest to receiver manufacturers is the open service Binary Offset Carrier BOC(1,1) modulation format to be transmitted at the L1 frequency. In preparation for the transmission of the first Galileo signals from space, NovAtel initiated development of their first prototype Galileo receiver, capable of tracking BOC(1,1) signals. NovAtel has successfully completed a contract with the Canadian Space Agency (CSA) to develop an FPGA based prototype of a Galileo BOC(1,1) receiver. The receiver is based on NovAtel’s new FPGA based precise positioning receiver, the Euro-L5. The receiver FPGA and software is configured to track the open service BOC(1,1) signal that will be transmitted on the Galileo L1 frequency. To reduce hardware design costs for this pre-production prototype development, the design was demonstrated at the L5/E5a frequency. No commercial Galileo hardware simulators are currently available to test the receiver. NovAtel modified an L5 signal transmitter, developed by NovAtel for Zeta Associates of Fairfax, Virginia, to output BOC(1,1) and BPSK(1) test signals. An overview of the NovAtel Euro-L5 FPGA based precise positioning receiver will be presented. The CSA sponsored BOC(1,1) receiver/transmitter development effort will be discussed. The expected results for the pseudorange noise will be derived for the BPSK and BOC signals. Test results of the prototype BOC(1,1) receiver will be presented and compared with performance results from a BPSK(1) receiver and the expected results.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".