Symbol and frame synchronization in a TDMA system

Details Symbol and frame synchronization in a TDMA system Symbol and frame synchronization in a TDMA system

1992-12-30

1995-04-18

Chin, Stephen

Pulse or digital communications

Synchronizers

375343, 3701051, 36472803, H04L 700

Patent

active

054085047

ABSTRACT:
A digital radio communication system includes a receiver for receiving a signal stream that includes data frames, each frame including a data signal sequence and a synchronizing sequence. The communication system synchronizes the receiver by employing the signal stream and comprises: a sampling circuit for sampling symbol levels in the synchronizing signal sequence; cross correlation circuitry for comparing values derived from the sampled symbol levels with an expected set of values and producing an error value output; and correction circuitry that is responsive to the error output and produces a sample control output to the sample circuitry to alter the times of sampling of the symbol levels so as to reduce the error output and achieve time synchronization with the received synchronizing signal sequence.

REFERENCES:
patent: 4692931 (1987-09-01), Ohsawa
patent: 4805191 (1989-02-01), Burch et al.
patent: 4847880 (1989-07-01), Kamerman et al.
patent: 4975927 (1990-12-01), Yoshida

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