System for wireless transmission and receiving of information and method of operation thereof
First Claim
1. Transmitting circuitry for wireless transmission of information by modulating a transmitted carrier with a subcarrier. with transmission of the information being subject to fading for a time interval, the transmitting circuitry comprising:
- a processor, responsive to a source of information, for providing a first encoded information stream which comprises the information to be transmitted and a second encoded information stream which also comprises the information to be transmitted with the second encoded information stream being delayed by a time delay interval with respect to the first information stream which is equal to or greater than the time interval of the fading; and
an encoder, responsive to the first and second encoded information streams, for modulating the subcarrier with the first and second encoded information streams to produce first and second parallel information streams modulated on cycles of the subcarrier with the first parallel stream containing the first encoded information stream, with the second parallel stream containing the second encoded information stream and with the first parallel information stream as modulated on the subcarrier being time displaced from the second parallel information stream by the time delay interval.
1 Assignment
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Accused Products
Abstract
A system and method is disclosed for wireless transmission of information which is subject to fading by using a RF carrier modulated with a subcarrier modulated with the information. The system has a bus interface which communicates with a digital signal processor which controls the transmitting and receiving circuitry functions. The bus interface is for connection to a computer bus which is connected to a computer which originates information to be transmitted by transmitting circuitry and which receives information from receiving circuitry. The digital signal processor provides first and second encoded information streams each comprising the information to be transmitted with the second stream being delayed by a time delay interval with respect to the first stream which is equal to or greater than the fading interval. The first and second encoded information streams modulate cycles of the subcarrier to produce first and second parallel information streams which are time offset by the time delay interval. The receiving circuitry has a detector for detecting transmitted first and second parallel information streams with the second parallel information stream being delayed from the first parallel information stream by the time delay interval. The digital signal processor determines if faded information is present in the frames of the detected first and second parallel information streams by processing the error correction code therein to determine if a number of bit errors are present which exceed the bit error correction capacity of the error correction code. The digital signal processor places an error marker within the detected first and second parallel information streams to mark each faded information unit and controls replacement of each error marker within at least one of the first and second parallel information streams with replacement data bits within a frame in one of the first and second parallel information streams which were time offset at transmission by the time delay interval to produce error free transmitted information.
109 Citations
96 Claims
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1. Transmitting circuitry for wireless transmission of information by modulating a transmitted carrier with a subcarrier. with transmission of the information being subject to fading for a time interval, the transmitting circuitry comprising:
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a processor, responsive to a source of information, for providing a first encoded information stream which comprises the information to be transmitted and a second encoded information stream which also comprises the information to be transmitted with the second encoded information stream being delayed by a time delay interval with respect to the first information stream which is equal to or greater than the time interval of the fading; and an encoder, responsive to the first and second encoded information streams, for modulating the subcarrier with the first and second encoded information streams to produce first and second parallel information streams modulated on cycles of the subcarrier with the first parallel stream containing the first encoded information stream, with the second parallel stream containing the second encoded information stream and with the first parallel information stream as modulated on the subcarrier being time displaced from the second parallel information stream by the time delay interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of wireless transmission of information by modulating a transmitted carrier with a subcarrier with transmission of the information being subject to fading for a time interval comprising:
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providing a first encoded information stream which comprises the information to be transmitted and a second encoded information stream which also comprises the information to be transmitted with the second information stream being delayed by a time delay interval with respect to the first information stream which is equal to or greater than the time interval of the fading; and modulating the subcarrier with the first and second encoded information streams to produce first and second parallel information streams modulated on cycles of the subcarrier with the first parallel information stream containing the first encoded information stream and with the second parallel information stream containing the second encoded information stream and with the first parallel information stream as modulated on the subcarrier being time displaced from the second parallel stream by the time delay interval. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 91, 92, 93)
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25. Receiving circuitry for receiving a wireless transmission of information with the wireless transmission of information being subject to fading for a time interval and being modulated with a carrier modulated with a subcarrier with the subcarrier being modulated with first and second identical encoded information streams to produce first and second parallel information streams modulated on cycles of the subcarrier with the first parallel information stream containing the first encoded information stream and with the second parallel information stream containing the second encoded information stream with the parallel information streams being transmitted with a time delay interval between the parallel information streams as modulated on the subcarrier which is equal to or greater than the time interval, the receiving circuitry comprising:
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a detector for detecting the transmitted first and second parallel information streams; and at least one processor, responsive to the detected parallel streams, for determining if faded information is present in at least one of the detected first and second parallel information streams and in response to determined faded information replacing the faded information caused by a fade with replacement information from at least one of the first and second parallel information streams which is time offset at transmission from the faded information by the time delay interval and outputting error free transmitted information including the replacement information. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A method of receiving a wireless transmission of information with the transmission of the information being subject to fading for a time interval and being modulated with a radio frequency carrier modulated with a subcarrier with the subcarrier being modulated with first and second identical encoded information streams to produce first and second parallel information streams modulated on cycles of the subcarrier with the first parallel information stream containing the first encoded information stream and with the second parallel information stream containing the second encoded information stream with the parallel information streams being transmitted with a time delay interval between the parallel streams as modulated on the subcarrier which is equal to or greater than the time interval comprising the steps:
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detecting the first and second parallel information streams which have been transmitted with the radio frequency carrier; and determining if faded information is present in at least one of the detected first and second parallel information streams and in response to determined faded information replacing the faded information caused by an fade with replacement information from one of the first and second parallel information streams which is time offset from the faded information by the time delay interval and outputting error free transmitted information including the replacement information. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 94, 95, 96)
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73. Receiving circuitry for receiving a wireless transmission of information modulated on cycles of a subcarrier comprising:
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a detector for detecting modulated cycles of a subcarrier; and a processor, coupled to the detector, for processing detected individual cycles of the subcarrier to calculate an integral of at least one selected modulated part of each of the individual cycles, numerically comparing each of the calculated integrals with a plurality of stored numerical ranges which ranges each represent one of a plurality of possible numerical values that the selected part may encode to identify a stored range numerically including the calculated integral and substituting for the at least one selected part of each of the cycles the one of the plurality of numerical values representative of the identified stored range including the calculated integral with each numerical value encoding at least a part of an information unit in one of the cycles; and
whereinthe processor processes the substituted numerical values to produce the information. - View Dependent Claims (74, 75)
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76. A method of receiving a wireless transmission of information comprising:
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detecting modulated cycles of a subcarrier; and processing detected individual cycles of the subcarrier modulated with the information to calculate an integral of at least one selected modulated part of each of the individual cycles, numerically comparing each of the calculated integrals with a plurality of stored numerical ranges which ranges each represent one of a plurality of possible numerical values that the selected modulated part may encode to identify a stored range numerically including the calculated integral and substituting for the at least one selected part of each of the cycles the one of the plurality of numerical values representative of the identified stored range including the calculated integral with each numerical value encoding at least a part of an information unit in one of the cycles; and
whereinprocessing the substituted numerical values to produce the information. - View Dependent Claims (77, 78)
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79. Receiving circuitry for receiving a wireless transmission of information with the transmission of the information being subject to fading for a time interval and being modulated with a carrier modulated with a subcarrier with the subcarrier being modulated with first and second encoded identical information streams to produce first and second parallel information streams modulated on cycles of the subcarrier with the first parallel information stream containing the first encoded information stream and with the second parallel information stream containing the second encoded information stream with the parallel information streams being transmitted with a time delay interval between the parallel information streams as modulated on the subcarrier which is equal to or greater than the time interval, the receiving circuitry comprising:
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a detector for detecting the transmitted first and second parallel information streams; a processor, responsive to the detected first and second parallel information streams, for determining if faded information is present in at least one of the detected first and second parallel information streams by processing error correction code contained in frames of the information to determine if the frames contain at least one uncorrectable bit after processing the error correction code and in response to determined faded information replacing the faded information caused by a fade with replacement information from at least one of the first and second parallel information streams which is time offset from the faded information by the time delay interval and outputting error free transmitted information including the replacement information. - View Dependent Claims (80, 81)
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82. A method of wireless transmission of information subject to fading for a time interval using a radio frequency carrier modulated with a subcarrier comprising:
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providing a first encoded information stream which comprises the information to be transmitted and a second encoded information stream which also comprises the information to be transmitted with the second information stream being delayed by a time delay interval with respect to the first information stream which is equal to or greater than the time interval of the fading; modulating the subcarrier with the first and second encoded information streams to produce first and second parallel information streams modulated on cycles of the subcarrier with the first parallel information stream containing the first encoded information stream, the second parallel information containing the second encoded information stream and with the first parallel information stream as modulated on the subcarrier being time displaced from the second parallel information stream by the time delay interval; transmitting the carrier modulated with the subcarrier modulated with the first and second parallel information streams; detecting the transmitted first and second parallel information streams; determining if faded information is present in at least one of the detected first and second parallel information streams by processing error correction code contained in frames of the information to determine if the frames contain at least one uncorrectable bit after processing the error correction code; in response to the faded information replacing the faded information caused by a fade with information from at least one of the first and second parallel information streams which is time offset from the faded information by the time delay interval; and outputting error free transmitted information including the replacement information. - View Dependent Claims (83, 84, 85, 86, 87, 88, 89, 90)
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Specification