1. A method for processing signals in a time division duplex (TDD) multiple-input multiple-output (MIMO) communication system, the method comprising:
receiving, at a communication device, a signal within a search range and at least one other signal within the search range; and
selecting, by the communication device, a capacity of the communication system based on the signal and the at least one other signal.
2. The method according to claim 1, further comprising:
selecting the signal within the search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the search range.
3. The method according to claim 1, further comprising:
selecting the capacity of the communication system based on a channel gain corresponding to the signal and the at least one other signal.
4. The method according to claim 1, further comprising: generating the search range by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals.
5. The method according to claim 4, further comprising:
generating the signal by sorting the plurality of signals based on the channel gain corresponding to each of the plurality of signals.
6. The method according to claim 4, further comprising:
determining the channel gain corresponding to each of the plurality of signals based on a plurality of channel measurements.
7. The method according to claim 1, further comprising:
selecting the capacity of the communication system based on a channel gain corresponding to the selected signal.
8. The method according to claim 1, further comprising:
adaptively updating the search range in real time.
9. The method according to claim 1, wherein selecting the capacity of the communication system comprises selecting the greater of a first maximum system capacity of the signal and a second maximum system capacity of the at least one other signal.
10. A system for processing signals in a time division duplex (TDD) multiple-input multiple-output (MIMO) communication system, the system comprising:
a user scheduler configured to select a signal within a search range and to select at least one other signal within the search range; and
a processor configured to select a capacity of the communication system based on the selected signal and the selected at least one other signal.
11. The system according to claim 10, wherein the user scheduler is further configured to select the signal corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the search range.
12. The system according to claim 10, wherein the processor is further configured to select the capacity of the system based on a channel gain corresponding to the signal and the at least one other signal.
13. The system according to claim 10, further comprising: a range reduction algorithm block configured to generate the search range by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals.
14. The system according to claim 13, wherein the user scheduler is further configured to select the signal by sorting the plurality of signals based on the channel gain corresponding to each of the plurality of signals.
15. The system according to claim 13, wherein the user scheduler is further configured to determine the channel gain associated with each of the plurality of signals based on a plurality of channel measurements.
16. The system according to claim 13, wherein the range reduction algorithm block is further configured to adaptively update the search range in real time.
17. The system according to claim 10, wherein the processor is further configured to select the capacity of the communication system based on a channel gain corresponding to the selected signal.
18. The system according to claim 10, further comprising: a power control block configured to allocate power levels to the signal and the at least one other signal based on a channel quality corresponding to the signal and the at least one other signal.
19. The system according to claim 10, wherein the processor is further configured to select the capacity of the communication system by selecting the greater of a first maximum system capacity of the signal and a second maximum system capacity of the at least one other signal.
20. A non-transitory computer-readable storage medium having instructions stored thereon that, when executed by a computing system, cause the computing system to perform operations comprising:
receiving, at a communication device, a signal within a search range and at least one other signal within the search range; and
selecting, by the communication device, a capacity of a time division duplex (TDD) multiple-input multiple-output (MIMO) communication system based on the signal and the at least one other 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 process for producing a nano-structure which is comprised of a matrix comprised of silicon, germanium, or silicon-germanium and cylindrical portions comprised of aluminum not larger 30 nm in diameter and having the longitudinal direction perpendicular to a substrate, the process comprising the step of forming a mixed film of Alx(SiyGe1-y)1-x (0.3\u2266X\u22660.8, 0\u2266Y\u22661) on the substrate by using aluminum and silicon, aluminum and germanium, or aluminum, silicon and germanium as the source materials, at a film-forming rate of not higher than 150 nmmin.
2. The process for producing a nano-structure according to claim 1, wherein a bias is applied to the substrate in the step of forming the mixed film.
3. The process for producing the nano-structure according to claim 2, wherein the bias is a DC bias to keep the potential of the substrate to be not higher than \u221220 V relative to the earth potential.
4. The process for producing the nano-structure according to claim 1, wherein the gas pressure in the step of forming the mixed film is not higher than 2.0 Pa.
5. The process for producing the nano-structure according to claim 1, wherein the diameter of the cylindrical portions is not less than 1 nm, and the film forming rate is not higher than 100 nmmin.
6. The process for producing the nano-structure according to claim 1, wherein the gas pressure in the step of forming the mixed film is not higher than 1.0 Pa.
7. The process for producing the nano-structure according to claim 1, wherein the diameter of the cylindrical portions is not less than 3 nm, and the film forming rate is not higher than 20 nmmin.
8. The process for producing the nano-structure according to claim 1, wherein the gas pressure in the step of forming the mixed film is not higher than 0.2 Pa.
9. The process for producing the nano-structure according to claim 1, wherein the process further comprises the step of removing the cylinder portions after formation of the mixed film of Alx(SiyGe1-y)1-x (0.3\u2266X\u22660.8, 0\u2266Y\u22661).