Excavating
Patent
1996-11-20
1998-05-12
Baker, Stephen M.
Excavating
370914, 371 22, 371 3702, H03M 1322
Patent
active
057517410
ABSTRACT:
A transceiver (34) includes a rate adaptation buffer (74) that synchronizes a data stream received at a 4.0 kHz rate to a data stream that is transmitted at a 4.05 kHz rate. A transmit section (62) of the transceiver (34) performs rate adaptation using a single rate adaptation buffer. The transmit section (62) includes four autonomous modules which are able to access the data in the rate adaptation buffer (74) independently of one another. These four modules include a CRC-scrambler (72), a FEC encoder (76), an interleaver (78), and a constellation encoder (80). A timing controller (84) prevents contention for accesses to the rate adaptation buffer (74). In addition, each of the four modules perform their respective functions quickly enough to prevent overflow or underflow conditions in the rate adaptation buffer (74). A receive section (64) functions similarly to the transmit section (62).
REFERENCES:
patent: 5596604 (1997-01-01), Cioffi et al.
patent: 5636224 (1997-06-01), Voith et al.
American Nat'l. Standards Institute, Inc., "Asymmetric Digital Subscriber Line (ADSL) Metallic Interface", American Nat'l. Standards Inst. Inc., Network and Customer Installation Interfaces, pp. 1-170.
Hoekstra George
Sudhaman Sujit
Voith Raymond Paul
Baker Stephen M.
Hill Daniel D.
Motorola Inc.
Polansky Paul J.
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