System for wireless transmission and receiving of information and method of operation thereof
First Claim
1. Receiving circuitry for reception of wireless transmission of information which is subject to fading for a time interval with a radio frequency carrier modulated with a subcarrier with the subcarrier modulated with first and second encoded information streams each containing the information to produce first and second parallel information streams modulating 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 first and second parallel information streams being transmitted with a time delay interval between the first and second parallel information streams which is equal to or greater than the time interval, the first and second encoded information streams comprise a plurality of synchronization bits for synchronizing the receiving circuitry with transmitting circuitry transmitting the radio frequency carrier modulated with the subcarrier and frames of information, a plurality of the frames each having a plurality of bits encoding error correction code and a plurality of bits encoding the information with the error correction code of the frames of the first encoded information stream not being capable of correcting for a fade of the time interval producing faded information in the first parallel information stream and representing a bit error if uncorrected which will cause a loss of synchronism between the receiving circuitry and the transmitting circuitry and the error correction code of the frames of the second encoded information stream not being capable of correcting for a fade of the time interval producing faded information in the second parallel information stream and representing a bit error if uncorrected which will cause a loss of synchronism between the receiving and the transmitting circuitry, the receiving circuitry comprising:
- a detector for detecting the transmitted first and second parallel information streams; and
a processor, coupled to the detector and responsive to the detected parallel information streams including the plurality of synchronization bits with the synchronization bits synchronizing the receiving circuitry with the transmitting circuitry, for determining if faded information is present in at least one of the detected first and second parallel information streams, 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 to maintain synchronization between the receiving and transmitting circuitry and outputting transmitted information including the replacement information.
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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.
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Citations
62 Claims
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1. Receiving circuitry for reception of wireless transmission of information which is subject to fading for a time interval with a radio frequency carrier modulated with a subcarrier with the subcarrier modulated with first and second encoded information streams each containing the information to produce first and second parallel information streams modulating 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 first and second parallel information streams being transmitted with a time delay interval between the first and second parallel information streams which is equal to or greater than the time interval, the first and second encoded information streams comprise a plurality of synchronization bits for synchronizing the receiving circuitry with transmitting circuitry transmitting the radio frequency carrier modulated with the subcarrier and frames of information, a plurality of the frames each having a plurality of bits encoding error correction code and a plurality of bits encoding the information with the error correction code of the frames of the first encoded information stream not being capable of correcting for a fade of the time interval producing faded information in the first parallel information stream and representing a bit error if uncorrected which will cause a loss of synchronism between the receiving circuitry and the transmitting circuitry and the error correction code of the frames of the second encoded information stream not being capable of correcting for a fade of the time interval producing faded information in the second parallel information stream and representing a bit error if uncorrected which will cause a loss of synchronism between the receiving and the transmitting circuitry, the receiving circuitry comprising:
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a detector for detecting the transmitted first and second parallel information streams; and a processor, coupled to the detector and responsive to the detected parallel information streams including the plurality of synchronization bits with the synchronization bits synchronizing the receiving circuitry with the transmitting circuitry, for determining if faded information is present in at least one of the detected first and second parallel information streams, 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 to maintain synchronization between the receiving and transmitting circuitry and outputting transmitted information including the replacement information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for reception of wireless transmission of information which is subject to fading for a time interval with a radio frequency carrier modulated with a subcarrier with the subcarrier modulated with first and second encoded information streams each containing the information to produce first and second parallel information streams modulating 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 first and second parallel information streams being transmitted with a time delay interval between the first and second parallel information streams which is equal to or greater than the time interval, the first and second encoded information streams comprise a plurality of synchronization bits for synchronizing the wireless transmission of the information with the reception of the information, a plurality of the frames each having a plurality of bits encoding error correction code and a plurality of bits encoding the information with the error correction code of the frames of the first encoded information stream not being capable of correcting for a fade of the time interval producing faded information in the first parallel information stream and representing a bit error if uncorrected which will cause a loss of synchronism between the transmission and the reception of the information and the error correction code of the frames of the second encoded information stream not being capable of correcting for a fade of the time interval producing faded information in the second parallel information stream and representing a bit error if uncorrected which will cause a loss of synchronism between the transmission and the reception of the information comprising the steps:
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detecting the transmitted first and second parallel information streams; and synchronizing the reception of the information with the transmission of the information with the synchronization bits of the detected 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, 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 to maintain synchronization between the reception and the transmission of the information and outputting transmitted information including the replacement information. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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Specification