Method in a selective call receiver for synchronizing to a multi

Details Method in a selective call receiver for synchronizing to a multi Method in a selective call receiver for synchronizing to a multi

1997-07-01

1999-09-28

Chin, Stephen

Pulse or digital communications

Multilevel

Synchronized

375360, 375334, 329300, H04L 2549

Patent

active

059600420

ABSTRACT:
A selective call receiver (800), including a receiver circuit (101) and a processor (810), is used for synchronizing an internal reference to symbol edges of a plurality of symbols in a multi-level radio signal transmitted by a radio communication system. To perform this function the processor (810) is adapted to cause the receiver circuit (101) to demodulate the multilevel radio signal to in-phase and quadrature signals (108, 106), convert the in-phase and quadrature signals (108, 106) to a sequence of state transitions representative of the plurality of symbols, detect at least one same state transition from the sequence of state transitions, and synchronize the internal reference to the at least one symbol edge of the plurality of symbols based on the at least one same state transition.

REFERENCES:
patent: 5208833 (1993-05-01), Erhart et al.
patent: 5548615 (1996-08-01), Wei
patent: 5901188 (1999-05-01), Roither

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