What is claimed is:
1. A receiver subsystem in a communication system for utilizing and combating the multipath-fading signal spanned over several symbol periods, comprising:
a signal register, receiving a input signal, for generating a plurality of output signals which is a moving section of the sampled signal of the input signal with the delay between any two adjacent output signals being equal;
a multipath detection device, which is coupled to signal register, for detecting the information about various components of a multipath signal,
a multipath combiner, which is coupled to signal register, for combining significant components;
an equalizer, receiving signal from the multipath combiner, for eliminating various interference;
a signal regeneration device, which is coupled to the equalizer, for regenerating the estimated transmission signal; and
a controller for extracting information on multipath components and generate various control signals.
2. A receiver subsystem in a communication system for utilizing and combating the multipath-fading signal spanned over several symbol periods as in claim 1, wherein an equalizer is a decision feedback equalizer consisting of a feedforward filter, feedback filter, a summation circuit, a detection circuit, and an error signal generator.
3. A receiver subsystem in a communication system for utilizing and combating the multipath-fading signal spanned over several symbol periods as in claim 2, wherein a detection circuit comprises an integrate-and-dump detector.
4. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath-fading signal spanned over several symbol periods, comprising:
a signal register, receiving a input signal, for generating a plurality of output signals which is a moving section of the sampled signal of the input signal with the delay between any two adjacent output signals being equal;
a multipath detection device, which is coupled to signal register, for detecting the information about various components of a multipath signal;
a multipath combiner, which is coupled to signal register, for combining significant components;
an equalizer, receiving signal from the multipath combiner, for eliminating various interference;
a multi-channel signal regeneration device, which is coupled to the equalizer, for regenerating the estimated multi-channel transmission signal; and
a controller for extracting information on multipath components and generate various control signals.
5. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 4, wherein an equalizer is a decision feedback equalizer consisting of a feedforward filter, feedback filter, a summation circuit, a multichannel detection circuit, and an error signal generator.
6. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 4, wherein a multipath combiner consists of a switch box and a signal combiner.
7. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 6, wherein a signal combiner is selected from the group consisting of maximum ratio combiner, equal gain combiner, and selection combiner.
8. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 4, wherein a multipath detection device comprises an element selected from the group consisting of a set of matched filters and a set of correlators.
9. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 5, wherein a multi-channel detection circuit comprises a set of matched filters.
10. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 5, wherein a multi-channel detection circuit comprises a set of correlators.
11. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 4, wherein a multi-channel signal regeneration device consists of a plurality of multipliers and an adder, with each multiplier multiplying a detected complex signal by the corresponding spreading signal and the adder adding all the products together with the summation further multiplied by a scrambled signal.
12. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath-fading signal spanned over several symbol periods, comprising
a signal register, receiving a input signal, for generating a plurality of output signals which is a moving section of the sampled signal of the input signal with the delay between any two adjacent output signals being equal;
a multipath detection device, which is coupled to signal register, for detecting the information about various components of a multipath signal;
a multipath combiner, which is coupled to signal register, for combining significant components;
a first transversal filter, receiving signal from the multipath combiner, for eliminating the interference from the future chips;
a multi-channel detection circuit for detecting the signal on each channel;
a multi-channel signal regeneration device, which is coupled to the multi-channel detection circuit, for regenerating the estimated transmission signal;
a second transversal filter, receiving signal from multi-channel signal regeneration device, for eliminating the interference from the past chips; and
a controller for extracting information on multipath components and generate various control signals.
13. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath-fading signal spanned over several symbol periods as in claim 12, further comprising:
a summation circuit for adding the signals from the first transversal filter and the second transversal filter together;
a delay circuit for delaying the signal from the output of the summation circuit for a certain time so that its output signal will be aligned up with the output signal from the multi-channel signal regeneration device on time;
a subtraction circuit for finding the difference between the two signals, one from the delay circuit and another from the multi-channel signal regeneration; and
an error signal generator, which is coupled to the subtraction circuit, for providing the error signal to both the first transversal filter and the second transversal filter for updating their coefficients.
14. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath-fading signal spanned over several symbol periods as in claim 12, wherein a multipath combiner is a maximum ratio combiner.
15. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 12, wherein a multi-channel signal regeneration device consists of a plurality of multipliers and an adder, wherein a multi-channel signal regeneration device consists of a plurality of multipliers and an adder, with each multiplier multiplying a detected complex signal by the corresponding spreading signal and the adder adding all the products together with the summation further multiplied by a scrambled signal.
16. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 12, wherein a multipath detection device comprises a set of matched filters.
17. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 12, wherein a multipath detection device comprises a set of correlators.
18. A receiver subsystem in a multi-channel direct sequence spread spectrum communication system for utilizing and combating the multipath fading signal spanned over several symbol periods as in claim 12, wherein a multi-channel detection circuit comprises an integrate-and-dump detector for each channel.
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. An apparatus for a setting unit to configure ID to at least two displays, comprising:
at least a first switch and a second switch, the first switch comprising an input terminal, an output terminal and a control terminal, and the second switch comprising an input terminal and a control terminal, wherein the input terminal of the first switch is electrically coupled to a communication interface transmission terminal of the setting unit, and the output terminal of the first switch is electrically coupled to the input terminal of the second switch, wherein the control terminals of the first and second switches are adapted for receiving an control signal from the displays, and are turned on or turned off after said switch receives signal sent from the control terminal of the display;
first transmission line, electrically coupled to the input terminal of the first switch, the receiving terminals of the display and a transmission terminal of the setting unit;
second transmission lines, electrically coupled to the output terminal of the first switch and the input terminal of the second switch and receiving terminals of the display; and
third transmission lines, electrically coupled to the transmission terminals of the displays and a communication interface receiving terminal of the setting unit.
2. The apparatus for configuring a display ID of claim 1, wherein the setting unit is a computer.
3. The apparatus for configuring a display ID of claim 1, wherein the communication interface receiving terminal and the transmission terminal of the display are a RS232 receiving terminal and a RS232 transmission terminal, respectively.
4. The apparatus for configuring a display ID of claim 1, wherein the communication interface of the setting unit are a RS232 receiving terminal and a RS232 transmission terminal, respectively.
5. A system for configuring a display ID, comprising:
a setting unit, comprising a transmission terminal and a receiving terminal;
at least two displays, each display comprising a control terminal, a microprocessor and a communication interface having a transmission terminal and a receiving terminal, wherein the microprocessor is electrically coupled to the transmission terminal, the receiving terminal, the control terminal, and a memory;
at least two switches, for accepting a control signal from the displays, and being turned on or turned off by receiving the control signal;
first transmission lines, electrically coupled to the input terminal of the first switch, the receiving terminals of the display and a transmission terminal of the setting unit;
second transmission lines, electrically coupled to the output terminal of the first switch and the input terminal of the second switch and receiving terminals of the display; and
third transmission lines, electrically coupled to the transmission terminals of the displays and a receiving terminal of the setting unit.
6. The system for configuring a display ID of claim 5, wherein the switches comprises at least a first switch and a second switch, wherein the first and second switches respectively comprises an input terminal, an output terminal and a control terminal, wherein the input terminal of the first switch is electrically coupled to a transmission terminal of the setting unit and the output terminal of the first switch is electrically coupled to the input terminal of the second switch, and wherein the control terminals are adapted to accept an control signal from the display to turn on or off the first and second switches upon receiving signal sent from the control terminals of the displays.
7. The system for configuring a display ID of claim 5, wherein the setting unit is a computer.
8. The system for configuring a display ID of claim 5, wherein the communication interface of each display are a RS232.
9. The system for configuring a display ID of claim 5, wherein the communication interface of the setting unit is a RS232.
10. A system for configuring a display ID, comprising:
a setting unit;
a plurality of displays, electrically coupled to the setting unit; and
a plurality of switches, configured in between the setting unit and the displays, each of the switches corresponding to one of the displays, and being turned on or turned off by its corresponding display, wherein when the setting unit issues a setting ID instruction, each of the switches is turned on by its corresponding display, and then the setting unit issues a plurality of identification configuration instructions, and wherein by sequentially turning off each of the switches, the corresponding ID of the corresponding display is configured by each of the ID configuration instructions.
11. The system for configuring a display ID of claim 10, wherein when the setting unit issues the ID configuration instructions, a subsequent ID configuration instruction is issued based on a reply signal sent by each of the configured displays.
12. The system for configuring a display ID of claim 10, wherein each of the displays is not electrically coupled to the setting unit until the ID configuration of a previous display is completed and a switch corresponding to the previous display had been turned off, and the setting unit issues the ID configuration instruction corresponding to the subsequent display only after a reply signal for indicating the configuration has been completed is received by the setting unit, so as to configure the ID for the subsequent display.
13. The system for configuring a display ID of claim 10, wherein the setting unit comprises a transmission terminal and a receiving terminal, which are electrically coupled to a receiving terminal and a transmission terminal of a microprocessor inside each of the displays via a first transmission lines and a second transmission lines, respectively, and the switches are configured on the first transmission lines.
14. The system for configuring a display ID of claim 10, wherein among the displays, the receiving terminal and the transmission terminal of a first display are electrically coupled to the transmission terminal and the receiving terminal of the setting unit via a first transmission lines and a second transmission lines, respectively, and the receiving terminal of a second display is electrically coupled to the transmission terminal of the setting unit via the first switching unit corresponding to the first display.
15. The system for configuring a display ID of claim 10, wherein each of the displays comprises a memory for storing the ID.
16. A method for configuring a display ID using an apparatus, the apparatus comprising at least a setting unit, a first display, a second display, a first switch and a second switch, the first display is electrically coupled to the setting unit, and the second display is electrically coupled to the setting unit via the first switch, and the method comprising:
turning on all switches;
all microprocessors receiving setting ID instruction from the setting unit;
all displays changing to ID setting mode and controlling all switches turn off;
first display receiving first ID information from the setting unit;
first ID microprocessor storing the ID in a memory of the first display;
first microprocessor quitting the ID setting mode and backing to normal operation mode;
second display receiving second ID information from the setting unit;
second ID microprocessor storing the ID in a memory of the second display.
17. A method of claim 16, wherein after the first microprocessor quitting the ID setting mode and backing to normal operation mode, the first microprocessor issuing a signal to the setting unit.