Method and system for communicating information in a digital signal
First Claim
1. A method for communicating a selected transmission parameter in a digital signal modulated according to a single carrier modulation technique and comprising distinct data symbols and pilot symbols, the method comprising:
- encoding the selected transmission parameter in a sequence characteristic of the pilot symbols distributed amongst the data symbols within a packet, the sequence characteristic being a function of the relative position of individual pilot symbols assigned to positions interleaved amongst the data symbols,wherein the sequence characteristic is one of a plurality of patterns, each pattern associated with at least one of a plurality of transmission parameters, the sequence characteristic being independent of the modulation technique; and
wherein a receiver, upon receiving the digital signal is able to determine the pattern of the sequence characteristic for the packet and thereby retrieve the selected transmission parameter.
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Accused Products
Abstract
The present invention relates to a communication method, system and signal, and in particular to a method and system for communicating information in a digital signal. It has particular application to satellite or terrestrial packet-based multi-user radio communication systems. A method for communicating information in a digital signal comprising data symbols is disclosed, wherein the information is encoded in a sequence characteristic of pilot symbols distributed amongst the data symbols, such that a receiver is able to determine the sequence characteristic and retrieve the transmitted information. The invention allows information to be encoded into a sequence characteristic of pilot, symbols, rather than relying on modulating such information onto the pilot symbols themselves. This allows a significantly larger number of pieces of information to be transmitted than hitherto possible, and the technique is more resistant to large frequency errors than prior techniques.
505 Citations
20 Claims
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1. A method for communicating a selected transmission parameter in a digital signal modulated according to a single carrier modulation technique and comprising distinct data symbols and pilot symbols, the method comprising:
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encoding the selected transmission parameter in a sequence characteristic of the pilot symbols distributed amongst the data symbols within a packet, the sequence characteristic being a function of the relative position of individual pilot symbols assigned to positions interleaved amongst the data symbols, wherein the sequence characteristic is one of a plurality of patterns, each pattern associated with at least one of a plurality of transmission parameters, the sequence characteristic being independent of the modulation technique; and wherein a receiver, upon receiving the digital signal is able to determine the pattern of the sequence characteristic for the packet and thereby retrieve the selected transmission parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A receiver method for retrieving a selected transmission parameter from a digital signal modulated according to a single carrier modulation technique and comprising distinct pilot symbols and data symbols, the method comprising:
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determining a sequence characteristic of the pilot symbols distributed amongst the data symbols included within a packet of the signal, the sequence characteristic being a function of the relative position of individual pilot symbols assigned to positions interleaved amongst the data symbols, wherein the sequence characteristic is one of a plurality of patterns, each pattern associated with at least one of a plurality of transmission parameters, the sequence characteristic being independent of the modulation technique, and retrieving the selected transmission parameter encoded in the pattern of the sequence characteristic. - View Dependent Claims (10)
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11. A method for a receiver to process a digital signal, the signal being modulated according to a single carrier modulation technique and comprising distinct data symbols and a sequence of individual pilot symbols temporally distributed amongst the data symbols in a packet, the method including:
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determining a characteristic of the sequence of pilot symbols, the characteristic being a function of the relative position of the individual pilot symbols assigned to positions interleaved amongst the data symbols, wherein the sequence characteristic is one of a plurality of patterns, each pattern associated with at least one of a plurality of transmit parameters and being independent of the modulation technique; recognizing the pattern; retrieving the transmit parameter encoded in the sequence characteristic of the pilot symbols by the pattern; and processing the signal using the retrieved transmit parameters. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A transmitter apparatus for communicating a selected transmission parameter in a digital signal modulated according to a single carrier modulation technique and comprising distinct data symbols and pilot symbols, the apparatus including:
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an encoder that is configured to encode the selected transmission parameter in a sequence characteristic of the pilot symbols distributed amongst the data symbols within a packet, the sequence characteristic being a function of the relative position of individual pilot symbols assigned to positions interleaved amongst the data symbols, wherein the sequence characteristic is one of a plurality of patterns, each pattern associated with at least one of a plurality of transmission parameters, the sequence characteristic being independent of the modulation technique, such that a receiver is able to determine the pattern of the sequence characteristic for the packet and thereby retrieve the selected transmission parameter. - View Dependent Claims (18)
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19. A receiver apparatus for retrieving a selected transmission parameter from a digital signal modulated according to a single carrier modulation technique and comprising distinct data symbols and pilot symbols, the receiver apparatus including:
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a digital signal processor configured to determine a sequence characteristic of the pilot symbols distributed amongst the data symbols included within a packet of the signal, the sequence characteristic being a function of the relative position of individual pilot symbols assigned to positions interleaved amongst the data symbols, wherein the sequence characteristic is one of a plurality of patterns, each pattern associated with at least one of a plurality of transmission parameters, the sequence characteristic being independent of the modulation technique, to thereby retrieve the selected transmission parameter encoded in the sequence characteristic.
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20. A receiver apparatus for processing a digital signal modulated according to a single carrier modulation technique and comprising distinct data symbols and a sequence of individual pilot symbols temporally distributed amongst the data symbols in a packet, the apparatus including:
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means for determining a characteristic of the sequence of pilot symbols, the characteristic being a function of the relative position of the individual pilot symbols assigned to positions interleaved amongst the data symbols wherein the sequence characteristic is one of a plurality of patterns, each pattern associated with at least one of a plurality of transmit parameters and being independent of the modulation technique; means for retrieving transmit parameters encoded in the value of the pilot symbols; and means for utilising the transmit parameters to process the signal.
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Specification