1. A compact imaging spectrometer apparatus, comprising:
an entrance slit,
an anamorphic mirror,
a grating, and
a detector array, wherein said entrance slit directs light to said anamorphic mirror, said anamorphic mirror receives said light and directs said light to a grating, said grating receives said light from said anamorphic mirror and defracts said light back onto said anamorphic mirror, and said anamorphic mirror focuses said light onto said detector array.
2. The compact imaging spectrometer apparatus of claim 1 wherein said grating has rulings immersed into a germanium surface.
3. The compact imaging spectrometer apparatus of claim 1 wherein said grating has rulings immersed into a germanium surface of a wedged germanium grating.
4. The compact imaging spectrometer apparatus of claim 1 wherein said grating has rulings immersed into a germanium surface of a flat germanium grating.
5. The compact imaging spectrometer apparatus of claim 4 wherein said grating has equally spaced straight rulings in a germanium surface of said flat germanium grating.
6. The compact imaging spectrometer apparatus of claim 1 wherein said grating has rulings that have varying ruling spacings.
7. The compact imaging spectrometer apparatus of claim 1 wherein said grating has rulings that are 36 grovesmm.
8. The compact imaging spectrometer apparatus of claim 1 wherein said grating has rulings that are cut on the back of a wedged germanium prism.
9. The compact imaging spectrometer apparatus of claim 1 wherein said apparatus has a front and a back, and wherein said entrance slit and said detector array are located at or near said font, and wherein said anamorphic mirror is located at or near said back.
10. The compact imaging spectrometer apparatus of claim 9 wherein said entrance slit, said grating, said anamorphic mirror, and said detector array fit within an envelope located between said front and said back.
11. The compact imaging spectrometer apparatus of claim 10 wherein said envelope is 3.5 cm or smaller by 5.0 cm or smaller by 2.0 cm or smaller.
12. A compact imaging spectrometer apparatus, comprising:
entrance slit means for directing light,
anamorphic mirror means for receiving said light and directing said light,
grating means for receiving said light from said anamorphic mirror means and defracting said light back onto said anamorphic mirror which focuses said light, and
detector array means for receiving said focused light.
13. The compact imaging spectrometer apparatus of claim 12 wherein said grating means comprises a grating with rulings immersed into a germanium surface.
14. The compact imaging spectrometer apparatus of claim 12 wherein said grating means comprises a grating with rulings immersed into a germanium surface of a wedged germanium grating.
15. The compact imaging spectrometer apparatus of claim 12 wherein said grating means comprises a grating with rulings immersed into a germanium surface of a flat germanium grating.
16. The compact imaging spectrometer apparatus of claim 12 wherein said grating means comprises a grating with equally spaced straight rulings.
17. The compact imaging spectrometer apparatus of claim 12 wherein said grating means comprises a grating with rulings that have varying ruling spacings.
18. The compact imaging spectrometer apparatus of claim 12 wherein said grating means comprises a grating with rulings that are 36 grovesmm.
19. The compact imaging spectrometer apparatus of claim 12 wherein said grating means comprises a grating with rulings that are cut on the back of a wedged germanium prism.
20. The compact imaging spectrometer apparatus of claim 12 wherein said apparatus has a front and a back, and wherein said entrance slit means and said detector array means are located at or near said font, and wherein said anamorphic mirror means is located at or near said back.
21. The compact imaging spectrometer apparatus of claim 12 wherein said entrance slit means, said grating means, said anamorphic mirror means, and said detector array means fit within an envelope located between said front and said back.
22. The compact imaging spectrometer apparatus of claim 21 wherein said envelope is 3.5 cm or smaller by 5.0 cm or smaller by 2.0 cm or smaller.
23. (canceled)
24. (canceled)
25. (canceled)
26. (canceled)
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 method of obtaining a transmit beamforming vector for transmission of high definition video data over a wireless medium, the method comprising:
modulating, at a first station, a first training signal with a first transmit beamforming vector;
transmitting, at the first station, the first modulated training signal;
receiving, at a second station, the first modulated training signal;
obtaining, at the second station, a receive beamforming vector, based on the first modulated training signal;
modulating, at the second station, a second training signal with the receive beamforming vector of the second station;
transmitting, at the second station, the modulated second training signal;
receiving, at the first station, the modulated second training signal;
obtaining, at the first station, a second transmit beamforming vector based on the modulated second training signal;
replacing the first transmit beamforming vector with the second transmit beamforming vector; and
determining whether to use the second transmit beamforming vector to modulate a high definition video data signal to be transmitted to the second station.
2. A method of obtaining a transmit beamforming vector for transmission of high definition video data over a wireless medium, the method comprising:
i) modulating a first training signal with a first transmit beamforming vector;
ii) transmitting the first modulated training signal to a station;
iii) receiving a second modulated training signal from the station;
iv) obtaining a second transmit beamforming vector based on the modulated second training signal;
v) replacing the first transmit beamforming vector with the second transmit beamforming vector; and
vi) determining whether to use the second transmit beamforming vector to modulate a high definition video data signal to be transmitted to the station.
3. The method of claim 2, wherein the station is the receiver of high definition video data.
4. The method of claim 2, wherein steps i)-vi) are repeated if it is determined not to use the second transmit beamforming vector for transmitting a high definition video data signal to the station.
5. The method of claim 2, wherein the determining comprises counting the number of times the replacing has occurred.
6. The method of claim 3, wherein the number of times the replacing occurs is two or three.
7. The method of claim 2, wherein the determining comprises comparing a metric obtained using the second transmit beamforming vector to a metric obtained using the first transmit beamforming vector.
8. The method of claim 7, wherein if the metric obtained using the second transmit beamforming vector and the metric obtained using the first transmit beamforming vector are substantially similar, it is determined to use the second transmit beamforming vector for transmitting a high definition video data signal to the station.
9. The method of claim 2, wherein the determining comprises receiving a determining signal from the station, and wherein the determining signal comprises an indication of whether or not to use the second transmit beamforming vector for transmitting a high definition video data signal to the station.
10. The method of claim 2, wherein the first and second transmit beamforming vectors are selected from a pool of candidate beamforming vectors.
11. The method of claim 2, wherein the receive beamforming vector is obtained through the use of maximal ratio combining.
12. The method of claim 2, wherein the high definition video data is uncompressed.
13. The method of claim 2, further comprising:
in a first state, obtaining a first determined vector by repeating i)-vi) until it is determined to use the second transmit beamforming vector for transmitting a high definition video data signal to the station,
in a second state, using the first determined vector for transmission of high definition video data, and
in a third state, determining if a second determined vector was successfully obtained using beamforming vector tracking.
14. The method of claim 13, wherein if it is determined that a second determined vector was successfully obtained, further comprising returning to the second state and using the second determined vector for transmission of high definition video data.
15. The method of claim 13, wherein if it is not determined that a second determined vector was successfully obtained, further comprising returning to the first state to obtain a second determined vector.
16. The method of claim 15, further comprising, returning to the second state and using the second determined vector for transmission of high definition video data.
17. A system for obtaining a transmit beamforming vector for transmission of high definition video data over a wireless medium, the system comprising:
at least one transceiver;
a memory configured to store a first transmit beamforming vector; and
a processor configured to:
i) perform beamforming with the first transmit beamforming vector to modulate a first training signal;
ii) transmit the modulated training signal via the at least one transceiver;
iii) receive a second modulated training signal via the at least one transceiver;
iv) obtain a second transmit beamforming vector based on the modulated second training signal;
v) replace the first transmit beamforming vector in the memory with the second transmit beamforming vector; and
vi) determine whether to use the second transmit beamforming vector to modulate a high definition video data signal to be transmitted.
18. The system of claim 17, wherein the processor repeats i)-vi) if it is determined not to use the second transmit beamforming vector for transmitting a high definition video data signal.
19. The system of claim 17, wherein the determining comprises receiving a determining signal from the station, and wherein the determining signal comprises an indication of whether to use the second transmit beamforming vector for transmitting a high definition video data signal.
20. The system of claim 17, wherein the system is implemented with one of the following: a HDTV set, a projector and a computing device, a set-top box, a DVD player or recorder, a digital camera, a camcorder and a computer device.
21. The system of claim 17, wherein the memory, the processor, or both the memory and the processor are contained within the transceiver.
22. A system for obtaining a transmit beamforming vector for transmission of high definition video data over a wireless medium, the system comprising:
at least one transceiver;
a memory configured to store a first transmit beamforming vector; and
a first module configured to perform beamforming with the first transmit beamforming vector to modulate a first training signal;
a second module configured to transmit the modulated training signal using the one or a plurality of transceivers;
a third module configured to receive a second modulated training signal using the one or a plurality of transceivers;
a fourth module configured to obtain a second transmit beamforming vector based on the modulated second training signal;
a fifth module configured to replace the first transmit beamforming vector in the memory with the second transmit beamforming vector; and
a sixth module configured to determine whether to use the second transmit beamforming vector to modulate a high definition video data signal to be transmitted to the station.
23. The system of 22, wherein two or more of the modules are implemented in one physical module.
24. A system for obtaining a transmit beamforming vector for transmission of high definition video data over a wireless medium, the system comprising:
means for modulating a first training signal with a first transmit beamforming vector;
means for transmitting the first modulated training signal to a station;
means for receiving a second modulated training signal from the station;
means for obtaining a second transmit beamforming vector based on the modulated second training signal;
means for replacing the first transmit beamforming vector with the second transmit beamforming vector; and
means for determining whether to use the second transmit beamforming vector to modulate a high definition video data signal to be transmitted to the station.
25. One or more processor-readable storage devices having processor-readable code, the processor-readable code for programming one or more processors to perform a method of obtaining a transmit beamforming vector for transmission of high definition video data over a wireless medium, the method comprising:
modulating a first training signal with a first transmit beamforming vector;
transmitting the first modulated training signal to a station;
receiving a second modulated training signal from the station;
obtaining a second transmit beamforming vector based on the modulated second training signal;
replacing the first transmit beamforming vector with the second transmit beamforming vector; and
determining whether to use the second transmit beamforming vector to modulate a high definition video data signal to be transmitted to the station.