Methods and apparatuses for synchronization and modulation type detection
First Claim
1. In a communication system including a transmitter and a receiver, an apparatus for synchronizing the receiver with the transmitter and detecting a modulation type in a signal transmitted by the transmitter and received by the receiver, the apparatus comprising:
- a detector for detecting the type of modulation being used in the received signal by correlating a first portion of the received signal with one or more signals representing modulation types used by the communication system to; and
a synchronization unit for synchronizing the receiver with the transmitter.
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Accused Products
Abstract
In a communication system including a transmitter and a receiver, the receiver is synchronized with the transmitter, and a modulation type in a signal transmitted by the transmitter and received by the receiver is detected. A first portion of the received signal is correlated with one or more signals representing modulation types used by the communication system to detect the type of modulation being used in the received signal. Synchronization is established between the transmitter and the receiver. The first portion may be correlated with each of one or more different signals representing various modulation types used in the communication system to detect the type of modulation used. Alternately, the first portion of the received signal may be derotated by different amounts to produce a plurality of derotated signals that are correlated with the signal representing modulation used by the communication system in order to detect the type of modulation used. If the correlation does not result in a determination of the modulation type, either a predetermined modulation type is selected as the modulation type, or the decision of the modulation type is made at a later stage based, e.g., on a comparison of signal qualities or equalization results.
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Citations
22 Claims
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1. In a communication system including a transmitter and a receiver, an apparatus for synchronizing the receiver with the transmitter and detecting a modulation type in a signal transmitted by the transmitter and received by the receiver, the apparatus comprising:
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a detector for detecting the type of modulation being used in the received signal by correlating a first portion of the received signal with one or more signals representing modulation types used by the communication system to; and
a synchronization unit for synchronizing the receiver with the transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In a communication system including a transmitter and a receiver, a method for synchronizing the receiver with the transmitter and detecting a modulation type in a transmitted signal received by the receiver, the method comprising the steps of:
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detecting the type of modulation being used in the received signal by correlating a first portion of the received signal with one or more signals representing the type of modulation used by the communication system; and
synchronizing the receiver with the transmitter. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification