Detection apparatus and method
First Claim
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1. A transceiver apparatus comprising:
- first means for detecting over a first detection period and providing a first output indicating a beginning of a message with first detection probability,second means for detecting over a second detection period being greater than the first detection period and providing a second output indicating the detection of the beginning of the message with a second detection probability, and said second detection period is shorter than the time from the beginning of the message to the time where reception of the message must be started in order to successfully receive the message,wherein said second detection probability is higher than said first detection probability, andsaid transceiver apparatus is arranged to receive the message if said second means for detecting indicates detection of the beginning of the message.
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Abstract
A transceiver apparatus and a method comprise detecting means for detecting messages, wherein the detecting means comprises a first detector arranged to operate over a first detection period and which output indicates the beginning of a message with a first detection probability, and a second detector arranged to operate over a second detection period and which output indicates the detection of the beginning of a message with a second detection probability. The second detection probability is higher than the first detection probability and the transceiver apparatus is arranged to receive the message if the second detector indicates detection of the beginning of a message.
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Citations
17 Claims
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1. A transceiver apparatus comprising:
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first means for detecting over a first detection period and providing a first output indicating a beginning of a message with first detection probability, second means for detecting over a second detection period being greater than the first detection period and providing a second output indicating the detection of the beginning of the message with a second detection probability, and said second detection period is shorter than the time from the beginning of the message to the time where reception of the message must be started in order to successfully receive the message, wherein said second detection probability is higher than said first detection probability, and said transceiver apparatus is arranged to receive the message if said second means for detecting indicates detection of the beginning of the message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for detecting the beginning of a message in a transceiver apparatus comprising a detector and a decoder, comprising the steps of:
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detecting, using a first set of detection parameters and a first detection process, the beginning of an incoming message for a first time period, detecting, using a second set of detection parameters and a second detection process, the beginning of said incoming message for a second time period, the second time period being greater than the first time period and the second time period is shorter than the time from the beginning of said incoming message to the time where reception of said incoming message must be started in order to successfully receive said incoming message and decoding said incoming message if said detection during said second time period indicates the presence of said incoming message. - View Dependent Claims (10, 11, 12)
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13. A transceiver apparatus comprising:
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a first detector arranged to operate over a first detection period, wherein the output from said first detector indicates the beginning of a message with a first detection probability, a second detector arranged to operate over a second detection period being greater than said first detection period and said second detection period is shorter than the time from the beginning of the message to the time where reception of the message must be started in order to successfully receive the message, wherein the output from said second detector indicates the detection of the beginning of the message with a second detection probability, said second detection probability is higher than said first detection probability, and wherein said transceiver apparatus is arranged to receive said message if said second detector indicates detection of the beginning of the message. - View Dependent Claims (14, 15, 16, 17)
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Specification