1. A signal generator, comprising:
an oscillator configured to generate an oscillation signal controlled in oscillation frequency by an analog control signal;
a digital phase detector configured to detect phase information of the oscillation signal and to output digital phase information;
a first differentiator configured to differentiate the digital phase information and to output digital frequency information;
a comparator configured to compare a frequency setting code used for setting the oscillation frequency with the digital frequency information and to output digital frequency error information;
a second differentiator configured to differentiate the frequency setting code and to generate a gain value corresponding to a slope of the frequency setting code and an inverse number of the gain value;
a first multiplier configured to multiply the digital frequency error information outputted from the comparator by the gain value;
a low-pass filter configured to remove a high frequency component in a result of multiplication by the first multiplier;
a second multiplier configured to multiply an output of the low-pass filter unit by the inverse number of the gain value;
a DA converter configured to convert a result of multiplication by the second multiplier into analog frequency error information; and
an integrator configured to integrate the analog frequency error information so as to convert the analog frequency error information into analog phase error information and to output the analog phase error information as the analog control signal.
2. The signal generator of claim 1, further comprising
a delay unit configured to delay the inverse number of the gain value by a predetermined time period,
wherein the second multiplier multiplies the output of the low-pass filter by the inverse number of the gain value delayed by the delay unit.
3. A radar device, comprising:
the signal generator of claim 2;
a transmitter configured to transmit the oscillation signal as a transmission signal;
a mixer configured to multiply a reception signal from a search object and the transmission signal so as to generate a beat signal, the reception signal being a reflected transmission signal reflected on the search object after being transmitted by the transmitter as the transmission signal; and
a calculator configured to calculate the beat signal to generate distance data to the search object.
4. The signal generator of claim 1, further comprising:
a holding unit configured to hold a compensation value corresponding to an offset of an output with respect to an input of the DA converter; and
an adder configured to add the compensation value held by the holding unit to a result of multiplication by the second multiplier.
5. The signal generator of claim 4,
wherein the DA converter includes a first current source passing an output current out and a second current source drawing the output current in; and
wherein the offset of the output with respect to the input of the DA converter is a difference between an absolute value of the current passed out by the first current source and an absolute value of the current drawn in by the second current source.
6. A radar device, comprising:
the signal generator of claim 5;
a transmitter configured to transmit the oscillation signal as a transmission signal;
a mixer configured to multiply a reception signal from a search object and the transmission signal so as to generate a beat signal, the reception signal being a reflected transmission signal reflected on the search object after being transmitted by the transmitter as the transmission signal; and
a calculator configured to calculate the beat signal to generate distance data to the search object.
7. A radar device, comprising:
the signal generator of claim 4;
a transmitter configured to transmit the oscillation signal as a transmission signal;
a mixer configured to multiply a reception signal from a search object and the transmission signal so as to generate a beat signal, the reception signal being a reflected transmission signal reflected on the search object after being transmitted by the transmitter as the transmission signal; and
a calculator configured to calculate the beat signal to generate distance data to the search object.
8. The signal generator of claim 1, further comprising:
a code generator configured to generate the frequency setting code and to input the frequency setting code into the comparator.
9. A radar device, comprising:
the signal generator of claim 8;
a transmitter configured to transmit the oscillation signal as a transmission signal;
a mixer configured to multiply a reception signal from a search object and the transmission signal so as to generate a beat signal, the reception signal being a reflected transmission signal reflected on the search object after transmitted by the transmitter as the transmission signal; and
a calculator configured to calculate the beat signal to generate distance data to the search object.
10. The signal generator of claim 1, further comprising a gain correction unit configured to correct the gain value according to a result of differentiation by the second differentiator.
11. A radar device, comprising:
the signal generator of claim 10;
a transmitter configured to transmit the oscillation signal as a transmission signal;
a mixer configured to multiply a reception signal from a search object and the transmission signal so as to generate a beat signal, the reception signal being a reflected transmission signal reflected on the search object after transmitted by the transmitter as the transmission signal; and
a calculator configured to calculate the beat signal to generate distance data to the search object.
12. A radar device, comprising:
the signal generator of claim 1;
a transmitter configured to transmit the oscillation signal as a transmission signal;
a mixer configured to multiply a reception signal from a search object and the transmission signal so as to generate a beat signal, the reception signal being a reflected transmission signal reflected on the search object after being transmitted by the transmitter as the transmission signal; and
a calculator configured to calculate the beat signal so as to generate distance data to the search object.
13. The signal generator of claim 1, wherein the oscillator linearly increases and decreases the oscillation frequency with respect to time according to the analog control signal.
14. An oscillator, comprising:
an oscillating unit configured to generate an oscillation signal controlled in oscillation frequency by an analog control signal;
a frequency divider configured to divide the oscillation frequency of the oscillation signal by a predetermined frequency division ratio;
a digital phase detector configured to detect phase information of a signal having a frequency divided by the frequency divider and to output digital phase information;
a first differentiator configured to differentiate the digital phase information and to output digital frequency information;
a comparator configured to compare a frequency setting code used for setting the oscillation frequency with the digital frequency information and to output digital frequency error information;
a second differentiator configured to differentiate the frequency setting code and to generate a gain value corresponding to a slope of the frequency setting code and an inverse number of the gain value;
a first multiplier configured to multiply the digital frequency error information outputted from the comparator by the gain value;
a low-pass filter configured to remove a high frequency component in a result of multiplication by the first multiplier;
a second multiplier configured to multiply an output of the low-pass filter unit by the inverse number of the gain value;
a DA converter configured to convert a result of multiplication by the second multiplier into analog frequency error information;
an integrator configured to integrate the analog frequency error information so as to convert the analog frequency error information into analog phase error information and to output the analog phase error information as the analog control signal; and
a reference signal oscillating unit configured to supply a predetermined reference signal to the frequency divider and the digital phase detector.
15. The oscillator of claim 14, further comprising a delay unit configured to delay the inverse number of the gain value by a predetermined time period,
wherein the second multiplier multiplies the output of the low-pass filter by the inverse number of the gain value delayed by the delay unit.
16. The oscillator of claim 14, further comprising:
a holding unit configured to hold a compensation value corresponding to an offset of an output with respect to an input of the DA converter; and
an adder configured to add the compensation value held by the holding unit to a result of multiplication by the second multiplier.
17. The oscillator of claim 16,
wherein the DA converter includes a first current source passing an output current out and a second current source drawing the output current in; and
wherein the offset of the output with respect to the input of the DA converter is a difference between an absolute value of the current passed out by the first current source and an absolute value of the current drawn in by the second current source.
18. The oscillator of claim 14, further comprising
a code generator configured to generate the frequency setting code and to input the frequency setting code into the comparator.
19. The oscillator of claim 14, further comprising
a gain correction unit configured to correct the gain value according to of a result of differentiation by the second differentiator.
20. The oscillator of claim 14, wherein the oscillating unit linearly increases and decreases the oscillation frequency with respect to time according to the analog control 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 method for use in a wireless transmitreceive unit (WTRU), the method comprising:
receiving priority information for each of a plurality of communication frequencies;
storing the priority information at the WTRU;
applying the priority information to at least one Closed Subscriber Group (CSG) cell; and
reselecting to a CSG cell, of the at least one CSG cell, in one of the plurality of communication frequencies on a condition that the CSG cell is included in a white list of the WTRU, wherein the CSG cell included in the white list of the WTRU is assigned a higher priority for reselection than a non-CSG cell.
2. The method according to claim 1, wherein the applying includes selecting a highest priority communication frequency.
3. The method according to claim 1, wherein on a condition that a cell reselection is considered between the CSG cell and a non-CSG cell, the non-CSG cell is assumed to have a lower priority than the CSG cell.
4. A method for use in a wireless transmitreceive unit (WTRU), the method comprising:
detecting a cell;
determining whether the cell is a Closed Subscriber Group (CSG) cell;
reading an intra-frequency reselection indication associated with the cell; and
allowing intra-frequency cell reselection regardless of the value of the intra-frequency reselection indication on a condition that the cell is a CSG cell.
5. The method according to claim 4, further comprising:
on a condition that the cell is a CSG cell, reselecting to another cell on a same frequency as the cell regardless of the intra-frequency cell reselection indication.
6. A method for use in a wireless transmitreceive unit (WTRU), the method comprising:
receiving priority information for each of a plurality of communication frequencies, wherein the priority information includes a one bit indicator for each of the plurality of communication frequencies;
storing the priority information at the WTRU;
applying the priority information to at least one Closed Subscriber Group (CSG) cell; and
reselecting to a CSG cell, of the at least one CSG cell, in one of the plurality of communication frequencies on a condition that the CSG cell is included in a white list of the WTRU.
7. The method according to claim 6, wherein the one bit indicator indicates whether the CSG cell is a public CSG cell or a private CSG cell.
8. The method according to claim 7, wherein the reselecting is performed on a further condition that the one bit indicator indicates that the CSG cell is a private CSG cell.
9. A wireless transmitreceive unit (WTRU) comprising:
a receiver configured to receive priority information for each of a plurality of communication frequencies;
a memory configured to store the priority information; and
a processor configured to:
apply the priority information to at least one closed subscriber group (CSG) cell; and
reselect to a CSG cell, of the at least one CSG cell, in one of the plurality of communication frequencies on a condition that the CSG cell is included in a white list of the WTRU, wherein the CSG cell included in the white list of the WTRU is assigned a higher priority for reselection than a non-CSG cell.
10. The WTRU of claim 9, wherein the processor is further configured to apply the priority information by selecting a highest priority communication frequency.
11. The WTRU of claim 9, wherein on a condition that a cell reselection is considered between the CSG cell and a non-CSG cell, the non-CSG cell is assumed to have a lower priority than the CSG cell.
12. A wireless transmitreceive unit (WTRU) comprising:
a receiver configured to receive priority information for each of a plurality of communication frequencies, wherein the priority information includes a one bit indicator for each of the plurality of communication frequencies;
a memory configured to store the priority information; and
a processor configured to:
apply the priority information to at least one closed subscriber group (CSG) cell; and
reselect to a CSG cell, of the at least one CSG cell, in one of the plurality of communication frequencies on a condition that the CSG cell is included in a white list of the WTRU.
13. The WTRU of claim 12, wherein the one bit indicator indicates whether the CSG cell is a public CSG cell or a private CSG cell.
14. The WTRU of claim 13, wherein the processor is further configured to reselect to the CSG cell on a further condition that the one bit indicator indicates that the CSG cell is a private CSG cell.
15. A wireless transmitreceive unit (WTRU) comprising:
a processor, a transmitter, and a receiver configured to:
detect a cell;
determine whether the cell is a Closed Subscriber Group (CSG) cell;
read an intra-frequency reselection indication associated with the cell; and
allow intra-frequency cell reselection regardless of the value of the intra-frequency reselection indication on a condition that the cell is a CSG cell.
16. The WTRU of claim 15, wherein the processor, the transmitter, and the receiver are further configured to reselect to another cell on a same frequency as the cell regardless of the intra-frequency cell reselection indication on a condition that the cell is a CSG cell.
17. The method of claim 5, wherein the reselecting is performed on a further condition that at least one cell reselection criteria is satisfied.
18. The method of claim 4, further comprising:
on a condition that the cell is not a CSG cell, reselecting to another cell that is on a different frequency from the cell on a condition that the intra-frequency cell reselection indication indicates that intra-frequency cell reselection is disallowed.
19. The WTRU of claim 16, wherein the processor, the transmitter, and the receiver are further configured to reselect on a further condition that at least one cell reselection criteria is satisfied.
20. The WTRU of claim 15, wherein the processor, the transmitter, and the receiver are further configured to reselect to another cell that is on a different frequency from the cell on a condition that the intra-frequency cell reselection indication indicates that intra-frequency cell reselection is disallowed on a condition that the cell is not a CSG cell.