Apparatus and method for transmitting and receiving data...

Details Apparatus and method for transmitting and receiving data... Apparatus and method for transmitting and receiving data...

2007-10-30

2007-10-30

Deppe, Betsy L. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C370S464000, C714S748000

Reexamination Certificate

active

10108881

ABSTRACT:
An apparatus and method for transmitting and receiving data, wherein retransmissions of information can be a different size from the initial transmission. The invention utilizes a partial Chase encoder306to truncate or expand data depending on the availability of channel resources for retransmission. A partial Chase combiner314processes the received demodulated data based solely on the number of codes and modulation received (i.e., predetermined, with no additional signaling required). If the received retransmission is smaller than the first transmission, only a portion of the soft bits are combined. If the retransmission is larger than the first transmission, some values of the stored first transmission are combined with more than one received soft bit in the retransmission.

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Chase, D. et al. “Application of Code Combining to a Selective-Repeat ARQ Link.”IEEE Military Communications Conference; Oct. 1985, pp. 247-252.

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