Apparatus and method for recovering a time-varying signal using

Details Apparatus and method for recovering a time-varying signal using Apparatus and method for recovering a time-varying signal using

1991-09-30

1993-08-31

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 942, 3701001, 375106, 375114, 375116, H04J 306

Patent

active

052415457

ABSTRACT:
The present invention presents an apparatus and method for recovering symbols in a data packet (101) transmitted to a receiver from a remote signal source (204) in a time-varying channel using multiple sampling points. In a digital cellular radiotelephone TDMA system, the receiver (202) performs a complex correlation on the desired slot sync word (DSSW) and the coded digital verification color code (CDVCC) in the data packet (101), and on the adjacent slot sync word (ASSW) in an adjacent data packet (102) to produce a first, second and third optimum sampling point, respectively. The data packet (101) is divided into four regions (A, B, C and D). The symbols in each region (A, B, C and D) are serially recovered using one or more of the multiple sampling points depending on the quality of the sampling point adjacent to each region (A, B, C and D).

REFERENCES:
patent: 4598413 (1986-07-01), Szechenyi
patent: 4665533 (1987-05-01), Tomikawa
patent: 4794624 (1988-12-01), Braun et al.

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