Power amplifier protection using a cyclic redundancy check on the digital transport of data
A method of conditioning payload data includes providing a processor and receiving a packet comprising payload data, a first error code, and a second error code. The method also includes computing, using the processor, a first recalculated error code and determining a difference between the first error code and the first recalculated error code. The method further includes modifying the payload data in response to determining the difference.
1. A system for transporting data in a Distributed Antenna System, the system comprising:
a plurality of Digital Access Units (DAUs), wherein the plurality of DAUs are coupled and operable to route signals between the plurality of DAUs;
a plurality of Digital Remote Units (DRUs) coupled to the plurality of DAUs and operable to transport signals between DRUs and DAUs;
wherein each of the plurality of DRUs includes:
an error detecting function; and
an algorithm that alters a payload signal when errors are detected.
2. The system of claim 1 wherein the plurality of DAUs are coupled via at least one of Ethernet cable, Optical Fiber, Microwave Line of Sight Link, Wireless Link, or Satellite Link.
3. The system of claim 1 wherein the plurality of DAUs are coupled to the plurality of DRUs via at least one of Ethernet cable, Optical Fiber, Microwave Line of Sight Link, Wireless Link, or Satellite Link.
4. The system of claim 1 wherein the plurality of DRUs are connected in a daisy chain configuration.
5. The system of claim 1 wherein the plurality of DRUs are connected to at least one of the plurality of DAUs in a star configuration.
6. The system of claim 1 wherein the plurality of DRUs are connected in a loop to at least one of the plurality of DAUs.
7. The system of claim 1 further comprising a plurality of Base Transceiver Stations (BTS), wherein a single DAU port of a DAU of the plurality of DAUs is connected to the plurality of BTS.
8. The system of claim 7 wherein the plurality of DAUs are connected to the plurality of BTSs via at least one of Ethernet cable, Optical Fiber, Microwave Line of Sight Link, Wireless Link, or Satellite Link.
9. The system of claim 1 wherein the algorithm alters the payload signal by nulling the payload signal.
10. The system of claim 1 wherein the algorithm alters the payload signal by adjusting a gain of the payload signal.
11. The system of claim 1 wherein the algorithm alters the payload signal by attenuating the payload signal to a reduced value.
12. A digital remote unit comprising:
a de-framer providing payload data, a first error code, and a second error code;
a first error code generation unit coupled to the de-framer and operable to:
receive at least a first portion of the payload data and the first error code; and
compute a first error code comparison value;
a second error code generation unit coupled to the de-framer and operable to:
receive at least a second portion of the payload data and the second error code; and
compute a second error code comparison value, wherein the second error code comparison value is computed concurrently with the first error code comparison value;
a first error code comparison unit coupled to the de-framer and the first error code generation unit and operable to:
compare the first error code and the first error code comparison value; and
compute a first modification signal;
a second error code comparison unit coupled to the de-framer and the second error code generation unit and operable to:
compare the second error code and the second error code comparison value, wherein the second error code and the second error code comparison value are compared concurrently with comparing the first error code and the first error code comparison value; and
compute a second modification signal; and
a payload conditioning unit coupled to the de-framer and operable to modify the payload data in response to at least one of the first modification signal or the second modification signal.
13. The digital remote unit of claim 12 wherein the payload conditioning unit modifies the payload data by nulling the payload data.
14. The digital remote unit of claim 12 wherein the payload conditioning unit modifies the payload data by adjusting a gain of the payload data.
15. The digital remote unit of claim 12 wherein the payload conditioning unit modifies the payload data by attenuating the payload data to a reduced value.
16. The digital remote unit of claim 12 wherein the payload conditioning unit is operable to maintain an average of previous payload data values, and wherein the payload conditioning unit modifies the payload data by adjusting the payload data according to an average of the previous payload data values.
17. The digital remote unit of claim 12 wherein the first portion of the payload data and the second portion of the payload data are the same portion of the payload data.