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authorVadim Yanitskiy <vyanitskiy@sysmocom.de>2021-01-11 02:33:25 +0100
committerVadim Yanitskiy <vyanitskiy@sysmocom.de>2021-01-19 17:47:09 +0100
commit114bf0a8afcaae3c7f76e98aeb84d7ef7da67680 (patch)
tree74c0ddf1e316cfef6623544cafb3ac0e64dcad10 /common/chapters/trx_if.adoc
parent1c55e0ffed4fcf4b9af3c49c3e6aae479e1c472d (diff)
TRXD: reserve a combination for Access Bursts on PACCH
Diffstat (limited to 'common/chapters/trx_if.adoc')
-rw-r--r--common/chapters/trx_if.adoc9
1 files changed, 8 insertions, 1 deletions
diff --git a/common/chapters/trx_if.adoc b/common/chapters/trx_if.adoc
index 8bc510e..26e1168 100644
--- a/common/chapters/trx_if.adoc
+++ b/common/chapters/trx_if.adoc
@@ -470,7 +470,9 @@ also have several synchronization sequences.
+-----------------+---------------------------------------+
| . 0 1 0 X . . . | 8-PSK, 2 TS sets (0..1) |
+-----------------+---------------------------------------+
-| . 0 1 1 X . . . | RFU (Reserved for Future Use) |
+| . 0 1 1 0 . . . | GMSK, Access Burst (see note) |
++-----------------+---------------------------------------+
+| . 0 1 1 1 . . . | RFU (Reserved for Future Use) |
+-----------------+---------------------------------------+
| . 1 0 0 X . . . | 16QAM, 2 TS sets (0..1) |
+-----------------+---------------------------------------+
@@ -480,6 +482,11 @@ also have several synchronization sequences.
+-----------------+---------------------------------------+
----
+NOTE: A radio block on PDCH is carried by the sequence of four Normal Bursts.
+The one exception is a special radio block occasionally used on the Uplink
+consisting of a sequence of four Access Bursts (see 3GPP TS 44.060). The
+transceiver shall use `0110` as the modulation type to indicate that.
+
Training Sequence Code::
The Training Sequence Code used to decode an Access or a Synchronization burst.
This field hence doesn't apply for Normal bursts.