1. A suspension insulator provided between a coil spring of a suspension device and a spring seat of the suspension device, the spring seat having:
a cylindrical peripheral wall part having an outer peripheral wall surface; and
an annular flange part extending radially outwardly from an axial end of the peripheral wall part and having a wall surface at the side of the peripheral wall part,
the insulator being formed of a resilient body and comprising;
a cylindrical part having an inner peripheral wall surface; and
an annular body part extending radially outwardly from an end of the cylindrical part and having an inner peripheral wall surface,
the body part having:
a first wall surface opposite to the cylindrical part; and
a second wall surface at the side of the cylindrical part,
the inner peripheral wall surface of the cylindrical part and the inner peripheral wall surface of the body part defining a space into which the peripheral wall part is inserted when the insulator is secured to the spring seat,
the first wall surface being in contact with the wall surface of the flange part at the side of the peripheral wall part under the state that the insulator is secured to the spring seat, and
the second wall surface being in contact with a coil end of the coil spring when the coil spring is seated on the insulator,
wherein a first portion of the inner peripheral wall surface of the cylindrical part between a first boundary plane and a second boundary plane has a first diameter smaller than a diameter of the outer peripheral wall surface of the peripheral wall part under the state that the insulator is not secured to the spring seat, the first boundary plane being located apart from a body part reference plane corresponding to a boundary plane between the cylindrical and body parts by a first distance, the second boundary plane being located apart from the first boundary plane in a direction apart from the body part by a second distance,
the first portion is configured to be a tight-contact wall surface which is in tight contact with the outer peripheral wall surface of the peripheral wall part under the state that the insulator is secured to the spring seat,
the entire inner peripheral wall surface of the body part and at least a part of a second portion of the inner peripheral wall surface of the cylindrical part between the body part reference plane and the first boundary plane each has a second diameter larger than the first diameter under the state that the insulator is not secured to the spring seat, and
the entire inner peripheral wall surface of the body part and the at least a part of the second portion are configured to be non-tight-contact wall surfaces, respectively, which are not in tight contact with the outer peripheral wall surface of the peripheral wall part under the state that the insulator is secured to the spring seat.
2. The suspension insulator as set forth in claim 1, wherein the non-tight-contact wall surface between the first boundary plane and a third boundary plane is configured to be a tapered wall surface having a diameter which increases from the first diameter as the tapered wall surface approaches the first wall surface of the body part under the state that the insulator is not secured to the spring seat, the third boundary plane being located apart from the first boundary plane by a third distance in a direction toward the first wall surface of the body part.
3. The suspension insulator as set forth in claim 1, wherein the second boundary plane is located at a position corresponding to an end of the cylindrical part opposite to the body part.
4. The suspension insulator as set forth in claim 1, wherein the portion of the cylindrical part defining the tight-contact wall surface has a thickness smaller than a thickness of the portion of the cylindrical part defining the non-tight-contact wall surface.
5. The suspension insulator as set forth in claim 1, wherein a maximum value of the thickness of the cylindrical part is smaller than a thickness of the body part.
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 comprising:
receiving a signal;
separating the signal into at least a first sub band and a second sub band;
detecting a first energy level in the first sub band;
detecting a second energy level in the second sub band; and
activating a control signal if the first energy level is different than the second energy level by more than a predetermined amount the control signal to activate an interference mitigation feature.
2. The method of claim 1, further comprising deactivating the control signal if the first energy level is not different that the second energy level by a predetermined amount.
3. The method of claim 1, further comprising performing data recovery if the interference mitigation feature is activated.
4. The method of claim 3, wherein activating an interference mitigation feature comprises one of presetting a gain of an amplifier, activating a time sampling feature, activating a time domain interference estimator, activating a filter or activating an interference cancellation feature.
5. The method of claim 1, wherein the control signal identifies one or more sub bands that have energy levels that are different than other sub bands by the predetermined amount.
6. The method of claim 1, further comprising passing a narrowband interference through a filter to reject a desired signal and to isolate the narrowband interference.
7. The method of claim 1, further comprising providing at least an indication of the lowest energy level detected to modules in a receive path.
8. The method of claim 1, wherein separating comprises digital filtering.
9. The method of claim 1, further comprising synchronizing, estimating the frequency spectrum of the received signal and performing data recovery on the signal.
10. The method of claim 1, wherein the control signal indicates a detection of narrowband interference.
11. A system for detecting interference comprising:
a band splitter to divide incoming electromagnetic energy into a plurality of sub bands;
at least one energy level detector to detect an amount of energy in at least two of the sub bands; and
a compare module to compare the detected energy level in the at least two sub bands and to activate a control signal if there is a difference in energy levels between the at least two sub bands that is greater than a predetermined level.
12. The system of claim 11, further comprising a reference level module to provide a reference signal to set the predetermined level.
13. The system of claim 11, wherein the band splitter comprises a plurality of band pass filters.
14. The system of claim 11, further comprising an interference mitigation module to mitigate interference in response to the signal.
15. The method of claim 14, wherein the interference mitigation module is one of a gain controller, a time sampler, a timer, a filter, or an interference canceller.
16. The system of claim 11, wherein the predetermined level is user selectable.
17. A machine-accessible medium containing instructions to operate a processing system which, when the instructions are executed by a machine, cause said machine to perform operations, comprising:
receiving a wideband signal, the wideband signal having a plurality of frequencies;
separating the signal into at least a first sub band of frequencies and a second sub band of frequencies;
detecting a first energy level in the first sub band of frequencies;
detecting a second energy level in the second sub band of frequencies; and
activating a control signal if the first energy level is different than the second energy level by more than a predetermined amount.
18. The machine-accessible medium of claim 17, which when executed causes the computer to deactivate the control signal if the first energy level is not different that the second energy level by a predetermined amount.
19. The machine-accessible medium of claim 17, which when executed causes the computer to activate an interference mitigation feature in response to activating the control signal.
20. The machine-accessible medium of claim 17, which when executed causes the computer to activating one of a preset a gain of an amplifier, a time sampling feature, a time domain interference estimator, a time domain interference detector, a filter or an interference cancellation feature.