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authorVadim Yanitskiy <axilirator@gmail.com>2019-07-07 19:14:44 +0700
committerVadim Yanitskiy <axilirator@gmail.com>2019-07-10 15:48:33 +0000
commitd1f15bd8964b97f7938ac370774db5b621c8c12b (patch)
treeb0f4aa3b13b2862388ff682ce8c983ecf2afeebd
parente2425485c4b9ab2be9acee0102ea9044576052ba (diff)
libosmogsm/l1sap.h: extend ph_rach_ind_param with lqual_cb
The link quality, defined by C/I (Carrier-to-Interference) ratio, can be computed from the training sequence of each burst, where we can compare the "ideal" training sequence with the actual training sequence and then express that in cB (centiBels, dB * 10). By analogy with both RSSI and ToA, it can be used to filter out false-positive detections and ghost Access Bursts. Change-Id: Ie2a66ebd040b61d6daf49e04bf8a84d3d64764ee
-rw-r--r--include/osmocom/gsm/l1sap.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/osmocom/gsm/l1sap.h b/include/osmocom/gsm/l1sap.h
index 9a9c008d..19cc87a3 100644
--- a/include/osmocom/gsm/l1sap.h
+++ b/include/osmocom/gsm/l1sap.h
@@ -68,6 +68,7 @@ struct ph_rach_ind_param {
int8_t rssi; /*!< RSSI of RACH indication */
uint16_t ber10k; /*!< BER in units of 0.01% */
int16_t acc_delay_256bits;/* !< Burst TA Offset in 1/256th bits */
+ int16_t lqual_cb; /* !< Link quality in centiBel */
};
/*! for PH-[UNIT]DATA.{req,ind} | PH-RTS.ind */