Incremental redundancy with space-time codes
First Claim
1. A wireless communication device comprising:
- a) transmission circuitry adapted to transmit symbols to a remote device via a plurality of antennas to provide spatial diversity;
b) a space-time encoder associated with the transmission circuitry and adapted to facilitate a first space-time coding technique to provide original symbols for transmission and space-time coded retransmission symbols in response to a request from the remote device, the retransmission symbols corresponding to select ones of the original symbols requiring retransmission to the remote device and processed in a manner such that the original symbols and the retransmission symbols are decoded in combination using a second space-time coding technique.
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Accused Products
Abstract
The present invention relates to space-time coding techniques capable of providing incremental redundancy in wireless communication environments incorporating spatial and temporal diversity. In general, a transmitter sends packets, via blocks of symbols, to a receiver with high bandwidth efficiency and only in the event that the receiver does not correctly receive a data packet does the transmitter send additional symbols to assist with the decoding of the incorrectly received packet. A hybrid ARQ feedback mechanism is used such that the receiver can inform the transmitter whether the packets were correctly or incorrectly received. From the feedback, the transmitter can determine whether to send new symbols or initiate incremental redundancy. By combining the received words corresponding to the redundant symbols and those of the original packet transmission, additional diversity, coding gain, signal energy, or a combination thereof are provided to the receiver and are used to correctly decode the transmitted data.
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Citations
55 Claims
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1. A wireless communication device comprising:
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a) transmission circuitry adapted to transmit symbols to a remote device via a plurality of antennas to provide spatial diversity; b) a space-time encoder associated with the transmission circuitry and adapted to facilitate a first space-time coding technique to provide original symbols for transmission and space-time coded retransmission symbols in response to a request from the remote device, the retransmission symbols corresponding to select ones of the original symbols requiring retransmission to the remote device and processed in a manner such that the original symbols and the retransmission symbols are decoded in combination using a second space-time coding technique. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A wireless communication device comprising:
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a) receive circuitry adapted to recover original symbols and retransmission symbols from a remote device via a plurality of antennas to provide spatial diversity and send a request to the remote device to transmit the retransmission symbols, the original symbols and the retransmission symbols encoded for transmission using a first space-time coding technique wherein the retransmission symbols are further encoded to allow the original symbols and the retransmission symbols to be decoded in combination using a second space-time coding technique; and b) a space-time decoder associated with the receive circuitry and adapted to facilitate space-time decoding to recover the original symbols by decoding the original symbols and the retransmission symbols in combination using the second space-time decoding technique, the retransmission symbols corresponding to select ones of the original symbols requiring retransmission from the remote device. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for facilitating wireless communications comprising:
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a) space-time coding and transmitting original symbols using a first space-time coding technique to a remote device via a plurality of antennas to provide spatial diversity; b) space-time encoding and transmitting retransmission symbols using the first space-time coding technique in response to a request from the remote device, the retransmission symbols corresponding to select ones of the original symbols requiring retransmission to the remote device and processed in a manner such that the original symbols and the retransmission symbols are decoded in combination using a second space-time coding technique. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method comprising:
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a) recovering original symbols and retransmission symbols from a remote device via a plurality of antennas to provide spatial diversity, the original symbols and the retransmission symbols encoded for transmission using a first space-time coding technique wherein the retransmission symbols are further encoded to allow the original symbols and the retransmission symbols to be decoded in combination using a second space-time coding technique; b) sending a request to the remote device to transmit the retransmission symbols; and c) space-time decoding to recover the original symbols by decoding the original symbols and the retransmission symbols in combination using the second space-time coding technique, the retransmission symbols corresponding to select ones of the original symbols requiring retransmission from the remote device. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification