Method and apparatus for blind transport format detection using discontinuous transmission (DTX) detection
View Patent ↗Methods and apparatus are provided for blind transport format detection using Discontinuous Transmission (DTX) detection. According to one aspect of the invention, the transport format that was used to transmit information is determined by identifying a transition between a Discontinuous Transmission segment and a data segment included in the transmitted information; and determining the transport format based on a location of the transition of the Discontinuous Transmission segment. A cyclic redundancy check can optionally be performed for a plurality of possible transport formats, and then the step of identifying a transition can be limited to those transport formats having a valid cyclic redundancy check.
1. An apparatus for determining a transport format used to transmit information, comprising:
at least one hardware device operative to:
identify a location within a deinterleaver of a transition between a Discontinuous Transmission segment and a data segment included in said transmitted information based on energy related information derived from said deinterleaver; and
determine said transport format by evaluating said identified location of said transition of said Discontinuous Transmission segment.
2. The apparatus of claim 1 , wherein said at least one hardware device is further configured to determine a size of said Discontinuous Transmission segment, and said determining said transport format step is based on said size.
3. The apparatus of claim 1 , wherein said at least one hardware device is further configured to determine an energy associated with said data segment relative to energy of a reference segment, and said determination is based on said energy associated with said data segment.
4. The apparatus of claim 1 , wherein said transmitted information is a transmitted frame.
5. The apparatus of claim 1 , wherein said at least one hardware device is further configured to evaluate a cyclic redundancy check for a plurality of possible transport formats, and wherein said identification is only performed for transport formats having a valid cyclic redundancy check.
6. The apparatus of claim 1 , wherein said identification is performed for transport formats having a valid cyclic redundancy check and wherein a start of DTX address is determined for each of said transport formats having a valid cyclic redundancy check.
7. The apparatus of claim 1 , wherein said at least one hardware device is further configured to update a base address of said information if puncturing is employed.
8. The apparatus of claim 1 , wherein said at least one hardware device is one or more of a digital signal processor, a microprocessor, a micro-controller, and a general-purpose computer.
9. The apparatus of claim 1 , wherein said apparatus is embodied on an integrated circuit.
10. An apparatus for determining a transport format used to transmit information, comprising:
a processor operative to:
identify a location within a deinterleaver of a transition between a Discontinuous Transmission segment and a data segment included in said transmitted information based on energy related information derived from said deinterleaver; and
determine said transport format by evaluating said identified location of said transition of said Discontinuous Transmission segment.
11. The apparatus of claim 10 , wherein said processor is further configured to determine a size of said Discontinuous Transmission segment, and said determining said transport format step is based on said size.
12. The apparatus of claim 10 , wherein said processor is further configured to determine an energy associated with said data segment relative to energy of a reference segment, and said determination is based on said energy associated with said data segment.
13. The apparatus of claim 10 , wherein said transmitted information is a transmitted frame.
14. The apparatus of claim 10 , wherein said processor is further configured to evaluate a cyclic redundancy check for a plurality of possible transport formats, and wherein said identification is only performed for transport formats having a valid cyclic redundancy check.
15. The apparatus of claim 10 , wherein said identification is performed for transport formats having a valid cyclic redundancy check and wherein a start of DTX address is determined for each of said transport formats having a valid cyclic redundancy check.
16. The apparatus of claim 10 , wherein said processor is further configured to update a base address of said information if puncturing is employed.
17. The apparatus of claim 1 , wherein said apparatus is embodied on an integrated circuit.