Appeal No. 2000-1900
Application No. 08/669,937
transmitted in each time slot in a coded time-division multiple
access (TDMA) communication system, and a mathematical distance
between the transmitted known test bits and the corresponding
received bits is determined by the receiver to indicate whether
the corresponding time slot is reliable. Alternatively, a
concatenated coding scheme can be used to transmit digital
communication signals, and reliability information can be
generated by using an inner code and the output of an inner
decoder.
Claims 1 and 7 are illustrative of the invention and read as
follows:
1. A method for generating reliability information
indicative of the reliability of data transmitted over a
TDMA communication channel, comprising the steps of:
transmitting one or more of a sequence of test bits in
each time slot of the TDMA communication channel, the test
bits being known to the receiver prior to the step of
transmitting;
determining, at the receiver, a mathematical distance
between the sequence of test bits as known to the receiver
and the sequence of test bits as received by the receiver;
and
generating, at the receiver, reliability information
indicative of the reliability of data transmitted over the
TDMA communication channel based on the mathematical
distance, and information estimates of the transmitted data.
2
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