L64704 LSI Logic Corporation, L64704 Datasheet - Page 138
L64704
Manufacturer Part Number
L64704
Description
Satellite Decoder Technical Manual 5/97
Manufacturer
LSI Logic Corporation
Datasheet
1.L64704.pdf
(220 pages)
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Figure 6.5
Synchronization,
Tracking, and Loss
of Sync for 3
Missed Sync
Words
6-6
Pa: State Transition, Sync Word Detected (N, M, K)
Qa: State Transition, Sync Word Misdetected
Pt: State Transition, Sync Word Detected (N, M, L)
Qt: State Transition, Sync Word Not Detected
The parameters in
N
M
K
MC
L
MSC
Decoding Pipeline Synchronization
Qa
MC
= 0
Synchronization State: SSA = 00
Length of the RS codeword in bytes
Length of synchronization word in bits (M = 8, fixed)
The maximum number of mismatching bits allowed to declare a match
when comparing M bits in the data stream to the reference sync word
during acquisition phase (K = 0, fixed)
Match Counter, number of sync word matches found so far during
acquisition phase
Maximum number of mismatching bits allowed to declare a match when
comparing M bits in the data stream to the reference sync word during
tracking phase (L = 0, 1, or 2)
Mismatch Counter, number of sync word mismatches found so far during
tracking phase
Pa
Acquisition Phase
Qa
MC
= 1
Figure 6.5
Pa
Qa
MC
= 2
are defined as follows:
Pa
MSC = 0
MC = 3
Pt
Synchronization State: SST = 01
Reacquire Sync
Tracking Phase
Pt
Qt
Qt
MSC
= 1
Pt
Qt
Loss of Sync
MSC
= 2
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