Methods, apparatus and computer program products for joint decoding of access probes in a CDMA communications system
First Claim
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1. A method of operating a wireless communications system, the method comprising:
- receiving a signal at a component of the wireless communications system;
generating a plurality of data sets from the received signal, respective ones of the plurality of data sets corresponding to respective ones of a transmitted series of access probes; and
jointly decoding the plurality of data sets to recover an access probe payload,wherein generating a plurality of data sets from the received signal comprises;
detecting access probe preambles in the received signal; and
generating respective data sets associated with respective ones of the detected access probe preambles;
wherein detecting access probe preambles in the received signal comprises detecting a pilot code in the received signal; and
wherein generating respective data sets associated with respective ones of the detected access probe preambles comprises coherently demodulating and despreading the received signal based on the detected pilot code to generate the plurality of data sets.
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Abstract
A signal is received at a component of the wireless CDMA communications system, such as a base station or satellite gateway. A plurality of data sets is generated from the received signal, respective ones of the plurality of data sets corresponding to respective access probes received, for example, over the reverse access channel (R-ACH) or reverse enhanced access channel (R-EACH). At least some of the plurality of data sets are jointly decoded to recover an access probe payload.
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Citations
36 Claims
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1. A method of operating a wireless communications system, the method comprising:
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receiving a signal at a component of the wireless communications system; generating a plurality of data sets from the received signal, respective ones of the plurality of data sets corresponding to respective ones of a transmitted series of access probes; and jointly decoding the plurality of data sets to recover an access probe payload, wherein generating a plurality of data sets from the received signal comprises; detecting access probe preambles in the received signal; and generating respective data sets associated with respective ones of the detected access probe preambles; wherein detecting access probe preambles in the received signal comprises detecting a pilot code in the received signal; and wherein generating respective data sets associated with respective ones of the detected access probe preambles comprises coherently demodulating and despreading the received signal based on the detected pilot code to generate the plurality of data sets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wireless communications system comprising:
at least one component configured to receive a signal, to generate a plurality of data sets from the received signal, respective ones of the plurality of data sets corresponding to respective ones of a transmitted series of access probes, and to jointly decode the plurality of data sets to recover an access probe payload, wherein the at least one component is configured to detect access probe preambles in the received signal and to identify respective ones of the plurality of data sets associated with respective ones of the detected access probe preambles and wherein the at least one component is configured to detect a pilot code in the received signal and to coherently demodulate and despread the received signal based on the detected pilot code to generate the plurality of data sets. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A non-transitory computer-readable medium comprising computer program code stored therein, the computer program code comprising:
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program code configured to identify a plurality of data sets in a signal, respective ones of the plurality of data sets corresponding to respective ones of a transmitted series of access probes; and program code configured to jointly decode the plurality of data sets to recover an access probe payload, wherein the program code configured to identify a plurality of data sets in a signal comprises; program code configured to detect access probe preambles in the signal; and program code configured to identify respective data sets associated respective ones of the detected access probe preambles; and wherein the program code configured to detect access probe preambles in the signal comprises program code configured to detect a pilot code in the received signal; and wherein the program code configured to identify respective data sets associated with respective ones of the detected access probe preambles comprises program code configured to coherently demodulate and despread the signal based on the detected pilot code to generate the plurality of data sets. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification