4 SBF Reference
BDSRawB1C
Number:
4218
"OnChange"
interval: 18s
This block contains the 1800 symbols of a BeiDou B-CNAV1 navigation frame (itself contain-
ing three subframes), as received from the B1C signal.
The symbols are deinterleaved. The receiver attempts to correct bit errors using the
LDPC parity bits, but unrecoverable errors are still possible at low C/N0. It is therefore
always needed to check the CRC status before using the navigation bits. A separate CRC
check is provided for subframe 2 and 3.
Parameter
Type Units
Do-Not-Use
Description
Sync1
c1
Block Header, see 4.1.1
Sync2
c1
u2
ID
u2
Length
u2
1
byte
u4
0.001
s
4294967295
u2
1
week
65535
u1
Satellite ID, see 4.1.9
CRCSF2
u1
Status of the CRC check of subframe 2:
0:
failed
1:
passed
CRCSF3
u1
Status of the CRC check of subframe 3:
0:
failed
1:
passed
Source
u1
Signal type from which the bits have been received, as defined in 4.1.10
Reserved
u1
Reserved for future use, to be ignored by decoding software.
RxChannel
u1
Receiver channel (see 4.1.11).
NAVBits
u4[57]
NAVBits
contains the 1800 deinterleaved symbols of a BeiDou B1C
(B-CNAV1) navigation frame.
Encoding:
NAVBits
contains all the symbols of the frame. The
first received symbol (i.e. the first symbol of subframe 1) is stored as
the MSB of
NAVBits[0]
. The 24 unused bits in NAVBits[56] must be
ignored by the decoding software.
Padding
u1[..]
Padding bytes, see 4.1.5
326
Summary of Contents for PolaRx5TR
Page 1: ...PolaRx5TR Reference Guide Applicable to version 5 5 0 of the Firmware ...
Page 73: ...3 Command Line Reference Chapter 3 Command Line Reference 73 ...
Page 130: ...3 Command Line Reference COM1 gim CR R gim IonosphereModel off COM1 130 ...
Page 237: ...3 Command Line Reference COM1 237 ...
Page 279: ...3 Command Line Reference COM1 279 ...
Page 294: ...4 SBF Reference Chapter 4 SBF Reference 294 ...