DATA DETECTION AND DEMODULATION FOR WIRELESS COMMUNICATION SYSTEMS
First Claim
1. A receiver unit in a wireless communication system, comprising:
- a demodulator operative to process received data symbols to provide recovered symbols;
a first data processor operative to process the recovered symbols to provide decoded data;
a second data processor operative to process the decoded data to provide remodulated symbols; and
a detector operative to process the received data symbols and the remodulated symbols to provide a detector output.
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Accused Products
Abstract
Techniques for detecting and demodulating data transmissions in wireless communication systems are presented. In one aspect, a decision-directed detector detects for data transmissions in a received signal by utilizing received data symbols as well as received pilot symbols. The decision-directed detector may be designed to perform differential detection in the frequency domain or coherent detection in the time domain, and may be used with multi-carrier modulation (e.g., OFDM). In another aspect, an adaptive threshold is used to perform detection of received data transmissions. A threshold may be determined for each data transmission hypothesized to have been received. The threshold may be computed, for example, based on the signal plus noise energy of the hypothesized data transmission.
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Citations
24 Claims
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1. A receiver unit in a wireless communication system, comprising:
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a demodulator operative to process received data symbols to provide recovered symbols;
a first data processor operative to process the recovered symbols to provide decoded data;
a second data processor operative to process the decoded data to provide remodulated symbols; and
a detector operative to process the received data symbols and the remodulated symbols to provide a detector output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A receiver unit in a wireless communication system, comprising:
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a processor operative to process received data symbols for a data transmission hypothesized to have been received and provide remodulated symbols that are estimates of transmitted data symbols; and
a detector operative to process the received data symbols and the remodulated symbols to provide a detector output that indicates whether or not the data transmission is deemed to have been received. - View Dependent Claims (11, 12)
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13. A method for receiving data in a wireless communication system, comprising:
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demodulating received data symbols to provide recovered symbols;
processing the recovered symbols to provide decoded data;
processing the decoded data to provide remodulated symbols; and
detecting the received data symbols and the remodulated symbols to provide a detector output. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for receiving data in a wireless communication system, comprising:
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processing received data symbols for a data transmission hypothesized to have been received and provide remodulated symbols that are estimates of transmitted data symbols; and
detecting the received data symbols and the remodulated symbols to provide a detector output that indicates whether or not the data transmission is deemed to have been received. - View Dependent Claims (23, 24)
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Specification