1. A method for performing leakage calculations, the method comprising:
receiving, at one or more computer systems, information specifying an integrated circuit;
determining, with one or more processors associated with the one or more computer systems, a neighborhood of shapes associated with the integrated circuit, wherein determining the neighborhood of shapes comprises:
determining a first set of spacings between a boundary of an internal shape of a first cell and a boundary of the first cell,
determining a second set of spacings between the boundary of the first cell and a boundary of a shape of a second cell, and
characterizing a lithography process using the first and second set of spacings; and
generating, with the one or more processors associated with the one or more computer systems, leakage information associated with the integrated circuit based on calculating leakage in the integrated circuit using a simulation of the characterized lithography process.
2. The method of claim 1 wherein characterizing the lithography process comprises characterizing effective transistor channel lengths as a function of the first and second set of spacings.
3. The method of claim 1 further comprising generating a mapping from the first and second set of spacings to the lithography process.
4. The method of claim 1 further comprising generating a mapping from the first and second set of spacings to leakage.
5. The method of claim 4 further comprising calculating leakage of the first cell based on the first and second set of spacing.
6. The method of claim 1 wherein the internal shape comprises a polysilicon transistor shape.
7. The method of claim 1 wherein the internal shape comprises a wiring shape.
8. A computer program product stored on a non-transitory computer readable medium for performing leakage calculations, the computer program product comprising:
code for receiving information specifying an integrated circuit;
code for determining a neighborhood of shapes associated with the integrated circuit, wherein the code for determining the neighborhood of shapes comprises:
code for determining a first set of spacings between a boundary of an internal shape of a first cell and a boundary of the first cell,
code for determining a second set of spacings between the boundary of the first cell and a boundary of a shape of a second cell, and
code for characterizing a lithography process using the first and second set of spacings; and
code for generating leakage information associated with the integrated circuit based on calculating leakage in the integrated circuit using a simulation of the characterized lithography process.
9. The computer program product of claim 8 wherein the code for characterizing the lithography process comprises code for characterizing effective transistor channel lengths as a function of the first and second set of spacings.
10. The computer program product of claim 8 further comprising code for generating a mapping from the first and second set of spacings to the lithography process.
11. The computer program product of claim 8 further comprising:
code for generating a mapping from the first and second set of spacings to leakage; and
code for calculating leakage of the first cell based on the first and second set of spacing.
12. The computer program product of claim 8 wherein the internal shape comprises a polysilicon transistor shape.
13. A system for performing leakage calculations, the system comprising:
a processor; and
a memory coupled to the processor, the memory configured to store a set of instructions which when executed by the processor cause the processor to:
receive information specifying an integrated circuit;
determine a neighborhood of shapes associated with the integrated circuit wherein determining the neighborhood of shapes comprises:
determining a first set of spacings between a boundary of an internal shape of a first cell and a boundary of the first cell,
determining a second set of spacings between the boundary of the first cell and a boundary of a shape of a second cell, and
characterizing a lithography process using the first and second set of spacings; and
generate leakage information associated with the integrated circuit based on calculating leakage in the integrated circuit using a simulation of the characterized lithography process.
14. The system of claim 13 wherein the processor is caused to characterize effective transistor channel lengths as a function of the first and second set of spacings to characterize the lithography process.
15. The system of claim 13 wherein the processor is further caused to generate a mapping from the first and second set of spacings to the lithography process.
16. The system of claim 13 wherein the processor is further caused to generate a mapping from the first and second set of spacings to leakage and calculate leakage of the first cell based on the first and second set of spacings.
17. The system of claim 13 wherein the internal shape comprises a polysilicon transistor shape.
18. A method for determining circuit performance, the method comprising:
receiving, at one or more computer systems, information specifying an integrated circuit;
determining, with one or more processors associated with the one or more computer systems, a neighborhood of shapes of a plurality of cells associated with the integrated circuit, wherein determining the neighborhood of shapes comprises:
determining a first set of spacings between a boundary of an internal shape associated with a first cell in the plurality of cells and a boundary of the first cell,
determining a second set of spacings between the boundary of the first cell and a boundary of a shape associated with a second cell in the plurality of cells, and
characterizing a lithography process using the first and second set of spacings;
generating a mapping between the first and second set of spacings and leakage;
calculating leakage of the first and second cells using a simulation of the characterized lithography process based on the first and second set of spacings;
generating a mapping from the first and second set of spacings to delay;
calculating delay of the first and second cells using a simulation of the characterized lithography process based on the first and second set of spacings; and
generating, with the one or more processors associated with the one or more computer systems, performance information associated with the integrated circuit based on electrical connections between the first cell and the second cell in response to the calculated delays and leakages of the first and second cells.
19. A computer program product stored on a non-transitory computer readable medium for determining circuit performance, the computer program product comprising:
code for receiving information specifying an integrated circuit;
code for determining a neighborhood of shapes of a plurality of cells associated with the integrated circuit, wherein determining the neighborhood of shapes comprises:
code for determining a first set of spacings between a boundary of an internal shape associated with a first cell in the plurality of cells and a boundary of the first cell,
code for determining a second set of spacings between the boundary of the first cell and a boundary of a shape associated with a second cell in the plurality of cells, and
code for characterizing a lithography process using the first and second set of spacings;
code for generating a mapping between the first and second set of spacings and leakage;
code for calculating leakage of the first and second cells using a simulation of the characterized lithography process based on the first and second set of spacings;
code for generating a mapping from the first and second set of spacings to delay;
code for calculating delay of the first and second cells using a simulation of the characterized lithography process based on the first and second set of spacings; and
code for generating performance information associated with the integrated circuit based on electrical connections between the first and second cells in response to the calculated delays and leakages of the first and second cells.
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 radio communications system operating over a channel having characteristics such that parameters of a transmission path can be predicted from received signals; said system comprising means for analysing signals received from said channel and a plurality of signal generation means adapted to vary output in response to said signal analysis.
2. A radio communications system as claimed in claim 1 wherein said plurality of signal generation means are adapted to co-operate; said co-operation adapted to vary in response to said signal analysis.
3. A radio communications system as claimed in claim 1 wherein said plurality of signal generation means are adapted to co-operate; said co-operation adapted to vary in response to said signal analysis and wherein said plurality of co-operating generation means comprises a plurality of transceiving antenna.
4. A radio communications system as claimed in claim 1 wherein said plurality of signal generation means are adapted to co-operate; said co-operation adapted to vary in response to said signal analysis and wherein said channel is reciprocal whereby optimal transmission antenna characteristics correspond with optimal receiving antenna characteristics; said receiving antenna characteristics optimised from signals received off said channel.
5. A radio communications system as claimed in claim 1 wherein said plurality of signal generation means are adapted to co-operate; said co-operation adapted to vary in response to said signal analysis, wherein said plurality of co-operating generation means comprises a plurality of transceiving antenna and wherein said channel is reciprocal whereby optimal transmission antenna characteristics correspond with optimal receiving antenna characteristics; said receiving antenna characteristics optimised from signals received off said channel.
6. A radio communications system as claimed in claim 1 further comprising a second set of transceiving antenna located at a second end of said channel;
wherein said plurality of signal generation means are adapted to cooperate, said co-operation adapted to vary in response to said signal analysis; and
wherein said channel is reciprocal whereby optimal transmission antenna characteristics correspond with optimal receiving antenna characteristics;
said receiving antenna characteristics optimised from signals received off said channel;
said system adapted to optimise said second set of antenna by communicating optimal antenna characteristics of the first set of antenna.
7. A radio communications system as claimed in claim 1 further comprising a second set of transceiving antenna located at a second end of said channel;
wherein said plurality of signal generation means are adapted to cooperate, said co-operation adapted to vary in response to said signal analysis;
wherein said plurality of co-operating generation means comprises a plurality of transceiving antenna; and,
wherein said channel is reciprocal;
whereby optimal transmission antenna characteristics correspond with optimal receiving antenna characteristics;
said receiving antenna characteristics optimised from signals received off said channel said system adapted to optimise said second set of antenna by communicating optimal antenna characteristics of the first set of antenna.
8. A radio communications system as claimed in claim 1 further comprising a second set of transceiving antenna located at a second end of said channel;
wherein said plurality of signal generation means are adapted to cooperate, said co-operation adapted to vary in response to said signal analysis;
wherein said plurality of co-operating generation means comprises a plurality of transceiving antenna;
wherein said channel is reciprocal; and,
whereby optimal transmission antenna characteristics correspond with optimal receiving antenna characteristics;
wherein said communication utilises a packet of data transmitted in a contention or access slot of a multiple access system;
said receiving antenna characteristics optimised from signals received off said channel said system adapted to optimise said second set of antenna by communicating optimal antenna characteristics of the first set of antenna wherein said communication utilises a packet of data transmitted in a contention or access slot of a multiple access system.
9. A radio communications system as claimed in claim 1 wherein said plurality of signal generation means are adapted to co-operate; said co-operation adapted to vary in response to said signal analysis and wherein said channel is reciprocal whereby optimal transmission antenna characteristics correspond with optimal receiving antenna characteristics; said receiving antenna characteristics optimised from signals received off said channel, and wherein said reciprocal channel utilises a time division duplexing scheme.
10. A radio communications system as claimed in claim 1 wherein said plurality of signal generation means are adapted to co-operate; said co-operation adapted to vary in response to said signal analysis, wherein said plurality of co-operating generation means comprises a plurality of transceiving antenna and wherein said channel is reciprocal whereby optimal transmission antenna characteristics correspond with optimal receiving antenna characteristics; said receiving antenna characteristics optimised from signals received off said channel, and wherein said reciprocal channel utilises a time division duplexing scheme.
11. A radio communications system as claimed in claim 1 further comprising a second set of transceiving antenna located at a second end of said channel;
wherein said plurality of signal generation means are adapted to cooperate, said co-operation adapted to vary in response to said signal analysis; and
wherein said channel is reciprocal whereby optimal transmission antenna characteristics correspond with optimal receiving antenna characteristics;
said receiving antenna characteristics optimised from signals received off said channel;
said system adapted to optimise said second set of antenna by communicating optimal antenna characteristics of the first set of antenna, and wherein said reciprocal channel utilises a time division duplexing scheme.
12. A method of communicating over a channel having characteristics such that transmission path characteristics are predictable from signals received off said channel; said method comprising the steps of:
1) analysing signals received from said channel;
2) varying the output from a plurality of signal generation means in response to said signal analysis.
13. A method of communicating over a channel having characteristics such that transmission path characteristics are predictable from signals received off said channel; said method comprising the steps of:
1) analysing signals received from said channel;
2) varying the output from a plurality of signal generation means in response to said signal analysis, wherein said plurality of signal generation means are further adapted to co-operate; step 2) further comprising varying co-operation between said signal generation means in response to said signal analysis.
14. A method of communicating over a channel having characteristics such that transmission path characteristics are predictable from signals received off said channel; said method comprising the steps of:
1) analysing signals received from said channel;
2) varying the output from a plurality of signal generation means in response to said signal analysis, wherein said plurality of signal generation means are further adapted to co-operate; step 2) further comprising varying co-operation between said signal generation means in response to said signal analysis wherein said channel is reciprocal and said plurality of co-operating signal generation means comprise a plurality of transceiving antenna, varying receive antenna characteristics in response to said signal analysis and varying transmitting antenna characteristics corresponding to said variation in receive antenna characteristics.
15. A method as claimed in claim 12 wherein step 1) further comprises a time division multiplexing signal generation scheme.
16. A signal transmitting and receiving station for use with a radio communications system operating over a channel with characteristics such that parameters of a transmission path can be predicted from received signals; said station further comprising a plurality of signal receiving and signal processing means adapted to analyse signals received from said channel and a plurality of signal generation means adapted to vary output in response to said signal analysis.
17. A signal transmitting and receiving station for use with a radio communications system operating over a channel with characteristics such that parameters of a transmission path can be predicted from received signals; said station further comprising a plurality of signal receiving and signal processing means adapted to analyse signals received from said channel and a plurality of signal generation means adapted to vary output in response to said signal analysis wherein said plurality of signal generation means are further adapted to co-operate; said co-operation adapted to vary in response to said signal analysis.
18. A signal transmitting and receiving station for use with a radio communications system operating over a channel with characteristics such that parameters of a transmission path can be predicted from received signals; said station further comprising a plurality of signal receiving and signal processing means adapted to analyse signals received from said channel and a plurality of signal generation means adapted to vary output in response to said signal analysis wherein said plurality of signal generation means are further adapted to co-operate; said co-operation adapted to vary in response to said signal analysis, and wherein said plurality of co-operating signal generation means comprise a plurality of transceiving antenna.
19. A signal transmitting and receiving station for use with a radio communications system operating over a reciprocal channel with characteristics such that parameters of a transmission path can be predicted from received signals;
said station further comprising a plurality of signal receiving and signal processing means adapted to analyse signals received from said channel and a plurality of signal generation means adapted to vary output in response to said signal analysis;
wherein said plurality of signal generation means are further adapted to co-operate in response to said signal analysis;
wherein said plurality of co-operating signal generation means comprise a plurality of transceiving antenna; and
wherein said station adapted to vary receive antenna characteristics in response to said signal analysis and to vary transmit antenna characteristics corresponding to said variation in receive antenna characteristics.