Differences

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--- doc:lps:tdoa:protocol [2017-08-31 16:57]
arnaud [Packets format]
+++ doc:lps:tdoa:protocol [2019-09-05 14:43]
kimberly
@@ Line 1: / Line 1: @@
+<WRAP center round important 60%>
+This page is deprecated and is moved to the main Bitcraze website. Please go to:
+ [[https://www.bitcraze.io/docs/lps-node-firmware/master/tdoa_protocol/]]
+</WRAP>
 ====== TDoA Anchor protocol V2 ======
@@ Line 22: / Line 31: @@
 typedef struct rangePacket_s {
   uint8_t type;
-  uint8_t seqs[NSLOTS];  // Packet sequence number of the timestamps
+  uint8_t seqs[8];  // Packet sequence number of the timestamps
-  uint8_t timestamps[NSLOTS][TS_TX_SIZE];  // Relevant time for anchors
+  uint32_t timestamps[8];  // Relevant time for anchors
-  uint16_t distances[NSLOTS];
+  uint16_t distances[8];
 } __attribute__((packed)) rangePacket_t;
 </code>
@@ Line 40: / Line 49: @@
      * **If i != anchor_id** Time of flight between current anchor and anchor **i** in radio timer tick expressed in current anchor clock
+===== Tag implementation =====
+A TDoA tag is simply an UWB sniffer. A sniffer can use the data in the packets together with the packet receive timestamps to calculate its position.
+In order to save some electric power, a tag implementation can choose to track the TDMA timeslots and only listen when packets are transmitted. Though this is not a requirement.
+===== Calculating TDoA =====
+[[doc:lps:tdoa:principles|Please see TDoA positioning principles]]

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