System and method for identifying co-channel interference in a radio network
First Claim
1. A method of detecting a transmission from a primary cellular transmitter, the primary cellular transmitter transmitting on at least one channel frequency and being located in the vicinity of one or more secondary cellular transmitters, the method comprising the steps of:
- receiving a first stream of transmission data having a first received signal frequency at a first reception location for a first period of time;
identifying the first signal frequency of the first stream of transmission data;
correlatingcomparing the first stream of transmission data against a signal templateplurality of predetermined burst structures to identify a first FCCH burst frame, the predetermined burst structures comprising at least one burst structure that includes a plurality of fixed bits in succession that indicate a training sequence;
identifying first FCCH time data corresponding to the first FCCH burst frame;
andcomparing the first signal frequency of the first stream of transmission data and the first FCCH time data corresponding to the first FCCH burst frame to a reference file, the reference file comprising a plurality of reliable measurements and a transmission cell sector corresponding to where each reliable measurement was received; and
to determinedetermining one or more probable transmission cells based on the comparison.
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Abstract
The present invention is directed toward a system and method for identifying co-channel interference in a radio network. In an exemplary method according to the present invention, a first stream of transmission data having a first received signal frequency at a first reception location for a first period of time is received. Further, the first signal frequency of the first stream of transmission data is identified. Then the transmission data is correlated against a signal template to identify a first FCCH burst frame. Then, first FCCH time data corresponding to the first FCCH burst frame is identified and the signal frequency of the first stream of transmission data and the first FCCH time data is compared to a reference file to determine one or more probable transmission cells.
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Citations
31 Claims
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1. A method of detecting a transmission from a primary cellular transmitter, the primary cellular transmitter transmitting on at least one channel frequency and being located in the vicinity of one or more secondary cellular transmitters, the method comprising the steps of:
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receiving a first stream of transmission data having a first received signal frequency at a first reception location for a first period of time; identifying the first signal frequency of the first stream of transmission data; correlatingcomparing the first stream of transmission data against a signal templateplurality of predetermined burst structures to identify a first FCCH burst frame, the predetermined burst structures comprising at least one burst structure that includes a plurality of fixed bits in succession that indicate a training sequence; identifying first FCCH time data corresponding to the first FCCH burst frame;
andcomparing the first signal frequency of the first stream of transmission data and the first FCCH time data corresponding to the first FCCH burst frame to a reference file, the reference file comprising a plurality of reliable measurements and a transmission cell sector corresponding to where each reliable measurement was received; and
to determinedetermining one or more probable transmission cells based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23, 24, 25, 26, 27, 28, 29)
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14. A system for detecting a transmission from a primary cellular transmitter, the primary cellular transmitter transmitting on at least one channel frequency and being located in the vicinity of one or more secondary cellular transmitters, the system comprising:
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an RF front end adapted to receive a first stream of transmission data having a first signal frequency at a first reception location for a first period of time; the RF front end further adapted to identifying the first signal frequency of the first stream of transmission data; a shaper adapted to correlate compare the first stream of transmission data against a signal template plurality of predetermined burst structures to identify a first FCCH burst frame, the predetermined burst structures comprising at least one burst structure that includes a plurality of fixed bits in succession that indicate a training sequence; the shaper further adapted to identify identifying first FCCH time data corresponding to the first FCCH burst frame; and an analyzer adapted to compare comparing the first signal frequency of the first stream of transmission data and the first FCCH time data corresponding to the first FCCH burst frame to a reference, the reference file comprising a plurality of reliable measurements and a transmission cell sector corresponding to where each reliable measurement was received; and
to determinethe analyzer determining a probable transmission cell based on the comparison. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 30, 31)
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Specification