rjm (Robert J. McEiiece)
`Tue 3/07/2000 4:12 PM (GMT-08:00)
`<aamod>, <hui>, <mas>
`
`From:
`Sent:
`To:
`Cc:
`Bee:
`Subject: A thought
`
`Hi all,
`
`It just occurred to me that our "generalized" RA codes arc just
`low-density GENERATOR matrix codes, followed by an accumulator.
`For example, ordinary RA codes are $( 1 ,q)$ LDGM codes + accumulator.
`
`So what we want to consider is whether irregular LDGM outer codes
`gain us anything.
`
`(Incidentally, Tommy Cheng considered LDGM codes in his thesis.)
`
`--Bob
`
`0001
`
`CALTECH - EXHIBIT 2021
`Apple Inc. v. California Institute of Technology
`IPR2017-00210
`
`
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