Multiplex communications – Diagnostic testing – Determination of communication parameters
Patent
1995-10-02
1997-12-23
Nguyen, Chau
Multiplex communications
Diagnostic testing
Determination of communication parameters
370337, 370465, 455 671, H04B 726
Patent
active
057012946
ABSTRACT:
A system and method for dynamically adapting the user bit rate of a time division multiple access (TDMA) cellular telecommunication system to achieve optimum voice quality over a broad range of radio channel conditions are disclosed. The system continuously monitors radio channel quality on both the uplink and the downlink, and dynamically adapts the system's combination of speech coding, channel coding, modulation, and number of assignable time slots per call to optimize voice quality for the measured conditions. Various combinations of the system's speech coding, channel coding, modulation, and assignable time slots are identified as combination types and corresponding cost functions are defined. By identifying and selecting the cost function with the lowest cost for the measured radio channel conditions, the system provides the maximum voice quality achievable within the limits of the system design.
REFERENCES:
patent: 4612414 (1986-09-01), Juang
patent: 4710925 (1987-12-01), Negi
patent: 4829519 (1989-05-01), Scotton et al.
patent: 5001776 (1991-03-01), Clark
patent: 5038399 (1991-08-01), Bruckert
patent: 5070536 (1991-12-01), Mahany et al.
patent: 5134615 (1992-07-01), Freeburg et al.
patent: 5195132 (1993-03-01), Bowker et al.
patent: 5257401 (1993-10-01), Dahlin et al.
patent: 5327576 (1994-07-01), Uddenfeldt et al.
patent: 5375123 (1994-12-01), Andersson et al.
J. Woodard & L. Hanzo, "A Dual-rate Algebraic CELP-based Speech Transceiver,", IEEE, 1994, pp. 1690-1694.
Sandell Anders
Ward Torbjorn
Nguyen Chau
Telefonaktiebolaget LM Ericsson
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