1. A method, instantiated in a non-transitory computer readable medium storing programming instructions, executable by a processor, the method comprising:
receiving a burst signal having a fundamental frequency;
producing digital samples of the received burst signal;
performing a Fourier transform on the digital samples of the received burst signal to produce frequency domain samples of the received burst signal, each frequency domain sample of the received burst signal having an associated phase value;
determining a slope of the phase values of the frequency domain samples of the received burst signal in a frequency band including the fundamental frequency; and
estimating a time-of-flight of the burst signal from the slope of the phase values of the frequency domain samples of the received burst signal in the frequency band including the fundamental frequency.
2. The method of claim 1, wherein estimating the time-of-flight of the burst signal further comprises:
defining a time window in which the received burst signal is received;
determining a delay of the received burst signal with respect to a specific point in the time window from the slope of the phase values of the frequency domain samples of the received burst signal; and
estimating the time-of-flight of the burst signal from the delay of the received burst signal with respect to the specific point in the time window.
3. The method of claim 2, wherein the specific point is the center of the time window.
4. The method of claim 2, further comprising:
generating a transmit trigger; and
transmitting the burst signal in response to the transmit trigger.
5. The method of claim 4, wherein estimating the time-of-flight of the burst signal further comprises:
generating a receive trigger at a specific time with respect to the transmit trigger; and
employing the receive trigger to define a start of the time window.
6. The method of claim 2, further comprising:
generating a trigger;
transmitting the burst signal in response to the trigger; and
wherein estimating the time-of-flight of the burst signal further comprises employing the trigger to define a start of the time window.
7. The method of claim 1, further comprising:
generating a trigger;
transmitting the burst signal in response to the trigger;
digitizing the transmit burst signal;
performing a Fourier transform on the digital samples of the transmit burst signal to produce frequency domain samples of the transmit burst signal, each frequency domain sample of the transmit burst signal having an associated phase value; and
determining a slope of the phase values of the frequency domain samples of the transmit burst signal in the frequency band including the fundamental frequency.
8. The method of claim 7, wherein estimating the time-of-flight of the burst signal further comprises determining a difference between the slope of the phase values of the frequency domain samples of the transmit burst signal and the slope of the phase values of the frequency domain samples of the received burst signal.
9. An apparatus, comprising:
a receive transducer configured to receive a burst signal having a fundamental frequency;
a first digitizer configured to produce digital samples of the received burst signal; and
a processor configured to execute an algorithm comprising:
performing a Fourier transform on the digital samples of the received burst signal to produce frequency domain samples of the received burst signal, each frequency domain sample of the received burst signal having an associated phase value;
determining a slope of the phase values of the frequency domain samples of the received burst signal in a frequency band including the fundamental frequency; and
estimating a time-of-flight of the burst signal from the slope of the phase values of the frequency domain samples of the received burst signal in the frequency band including the fundamental frequency.
10. The apparatus of claim 9, wherein the algorithm further comprises:
defining a time window in which the received burst signal is received;
determining a delay of the received burst signal with respect to a specific point in the time window from the slope of the phase values of the frequency domain samples of the received burst signal; and
estimating the time-of-flight of the burst signal from the delay of the received burst signal with respect to the specific point in the time window.
11. The apparatus of claim 10, wherein the specific point is the center of the time window.
12. The apparatus of claim 10, further comprising:
a transmit signal generator configured to generate the burst signal; and
a transmit transducer configured to transmit the burst signal in response to a transmit trigger generated by the processor.
13. The apparatus of claim 12, wherein the processor is configured to generate a receive trigger at a specific time with respect to the transmit trigger, and wherein the algorithm further comprises employing the receive trigger to define a start of the time window.
14. The apparatus of claim 9, further comprising:
a transmit signal generator configured to generate the burst signal; and
a transmit transducer configured to transmit the burst signal in response to a trigger generated by the processor,
wherein estimating the time-of-flight of the burst signal further comprises employing the trigger to define a start of the time window.
15. A method, instantiated in a non-transitory computer readable medium storing programming instructions, executable by a processor, for estimating the time of flight of a burst signal, the method comprising:
receiving the burst signal;
determining a slope of a phase characteristic of a Fourier transform of the received burst signal; and
estimating the time-of-flight of the burst signal from the slope of the phase characteristic of the Fourier transform of the received burst signal.
16. The method of claim 15, further comprising:
defining a time window in which the received burst signal is received;
determining a delay of the received burst signal with respect to a specific point in the time window from the slope of the phase characteristic of the Fourier transform of the received burst signal; and
estimating the time-of-flight of the burst signal from the delay of the received burst signal with respect to the specific point in the time window.
17. The method of claim 15, further comprising:
generating a trigger;
transmitting the burst signal in response to the trigger; and
determining a slope of the phase characteristic of the Fourier transform of the transmit burst signal.
18. The method of claim 17, further comprising determining a difference between the slope of the phase characteristic of the Fourier transform of the received burst signal and the slope of the phase characteristic of the Fourier transform of the transmit burst signal.
19. An apparatus, comprising:
a receive transducer configured to receive a burst signal having a fundamental frequency;
a first digitizer configured to produce digital samples of the received burst signal; and
a processor configured to execute an algorithm comprising:
performing a Fourier transform on the digital samples of the received burst signal to produce frequency domain samples of the received burst signal, each frequency domain sample of the received burst signal having an associated phase value;
determining a slope of the phase values of the frequency domain samples of the received burst signal in a frequency band including the fundamental frequency; and
estimating a time-of-flight of the burst signal from the slope of the phase values of the frequency domain samples of the received burst signal in the frequency band including the fundamental frequency;
a transmit transducer configured to transmit the burst signal in response to a trigger; and
a second digitizer configured to produce digital samples of the transmit burst signal in parallel with the first digitizer producing the digital samples of the received burst signal; and
the algorithm further comprising:
performing a Fourier transform on the digital samples of the transmit burst signal to produce frequency domain samples of the transmit burst signal, each frequency domain sample of the transmit burst signal having an associated phase value;
determining a slope of the phase values of the frequency domain samples of the transmit burst signal in the frequency band including the fundamental frequency, wherein the algorithm estimates the time-of-flight of the burst signal by determining a difference between the slope of the frequency domain phase samples of the transmit burst signal and the slope of the frequency domain phase samples of the received burst signal.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A plant or a plant part of soybean variety XB26E11, representative seed of said soybean variety XB26E11 having been deposited under ATCC Accession Number PTA-11654.
2. A seed of soybean variety XB26E11, representative seed of said soybean variety XB26E11 having been deposited under ATCC Accession Number PTA-11654.
3. A soybean seed obtained by introducing a transgene into soybean variety XB26E11, representative seed of said soybean variety XB26E11 having been deposited under ATCC Accession Number PTA-11654.
4. The seed of claim 3, wherein the transgene confers a trait selected from the group consisting of male sterility, site-specific recombination, abiotic stress tolerance, altered phosphorus, altered antioxidants, altered fatty acids, altered essential amino acids, altered carbohydrates, herbicide resistance, insect resistance, and disease resistance.
5. A soybean plant, or a part thereof, produced by growing the seed of claim 2.
6. A soybean plant, or a part thereof, produced by growing the seed of claim 3.
7. A method for developing a second soybean plant comprising applying plant breeding techniques to a first soybean plant, or parts thereof, wherein said first soybean plant is the soybean plant of claim 1, and wherein application of said techniques results in development of said second soybean plant.
8. A method for producing soybean seed comprising crossing two soybean plants and harvesting the resultant soybean seed, wherein at least one soybean plant is the soybean plant of claim 1.
9. The soybean seed produced by the method of claim 8.
10. A soybean plant, or a part thereof, produced by growing said seed of claim 9.
11. A method for developing a second soybean plant in a soybean plant breeding program comprising applying plant breeding techniques to a first soybean plant, or parts thereof, wherein said first soybean plant is the soybean plant of claim 10, and wherein application of said techniques results in development of said second soybean plant.
12. A method of producing a soybean plant comprising a locus conversion, the method comprising introducing a locus conversion into the plant of claim 5, wherein said locus conversion provides a trait selected from the group consisting of male sterility, site-specific recombination, abiotic stress tolerance, altered phosphorus, altered antioxidants, altered fatty acids, altered essential amino acids, altered carbohydrates, herbicide resistance, insect resistance, and disease resistance.
13. An herbicide resistant soybean plant produced by the method of claim 12.
14. A disease resistant soybean plant produced by the method of claim 12.
15. An insect resistant soybean plant produced by the method of claim 12.
16. The soybean plant of claim 15, wherein the locus conversion comprises a transgene encoding a Bacillus thuringiensis (Bt) endotoxin.
17. A soybean plant, or a part thereof, expressing all the physiological and morphological characteristics of soybean variety XB26E11, representative seed of said soybean variety XB26E11 having been deposited under ATCC Accession Number PTA-11654.
18. A method comprising isolating nucleic acids from a plant, a plant part, or a seed of soybean variety XB26E11, analyzing said nucleic acids to produce data, and recording the data for XB26E11, representative seed of said soybean variety XB26E11 having been deposited under ATCC Accession Number PTA-11654.
19. The method of claim 18, wherein the data is recorded on a computer readable medium.
20. The method of claim 18, further comprising using the data for crossing, selection, or advancement decisions in a breeding program.