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fixeria gerrit-no-reply at lists.osmocom.orgfixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-gsm-manuals/+/22616 ) Change subject: TRXD: use different coding for AQPSK in the 'MTC' field ...................................................................... TRXD: use different coding for AQPSK in the 'MTC' field AQPSK is used exclusively on Downlink in VAMOS mode. An AQPSK burst is basically a combination of two Normal Bursts. Each of these two bursts has the same length as defined for GMSK, while both must be using Training Sequences from different sets. Four different sets are defined in 3GPP 45.002, section 5.2.3.1. Therefore we need *two* bits to encode all possible values. Let's rearrange the existing combinations and use '11XX'B for AQPSK. The old combination '011X'B becomes reserved and can be re-purposed. This change is considered to be safe, given that no implementations are known to support AQPSK at the moment of making this change. Change-Id: Ie9b419e4a70fa0eb2888c326ac50d2d40a67a29c Related: SYS#4895, OS#4941, OS#4006 --- M common/chapters/trx_if.adoc 1 file changed, 2 insertions(+), 2 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-gsm-manuals refs/changes/16/22616/1 diff --git a/common/chapters/trx_if.adoc b/common/chapters/trx_if.adoc index cf2687d..8bc510e 100644 --- a/common/chapters/trx_if.adoc +++ b/common/chapters/trx_if.adoc @@ -470,13 +470,13 @@ +-----------------+---------------------------------------+ | . 0 1 0 X . . . | 8-PSK, 2 TS sets (0..1) | +-----------------+---------------------------------------+ -| . 0 1 1 X . . . | AQPSK, 2 TS sets (0..1) | +| . 0 1 1 X . . . | RFU (Reserved for Future Use) | +-----------------+---------------------------------------+ | . 1 0 0 X . . . | 16QAM, 2 TS sets (0..1) | +-----------------+---------------------------------------+ | . 1 0 1 X . . . | 32QAM, 2 TS sets (0..1) | +-----------------+---------------------------------------+ -| . 1 1 X X . . . | RESERVED (0) | +| . 1 1 X X . . . | AQPSK (Downlink), 4 TS sets (0..3) | +-----------------+---------------------------------------+ ---- -- To view, visit https://gerrit.osmocom.org/c/osmo-gsm-manuals/+/22616 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-gsm-manuals Gerrit-Branch: master Gerrit-Change-Id: Ie9b419e4a70fa0eb2888c326ac50d2d40a67a29c Gerrit-Change-Number: 22616 Gerrit-PatchSet: 1 Gerrit-Owner: fixeria <vyanitskiy at sysmocom.de> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20210201/38f1b5fc/attachment.htm>