diff options
Diffstat (limited to 'grc/trx/gsm_trx_burst_if.xml')
| -rw-r--r-- | grc/trx/gsm_trx_burst_if.xml | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/grc/trx/gsm_trx_burst_if.xml b/grc/trx/gsm_trx_burst_if.xml new file mode 100644 index 0000000..99427b3 --- /dev/null +++ b/grc/trx/gsm_trx_burst_if.xml @@ -0,0 +1,58 @@ +<?xml version="1.0"?> +<block> + <name>TRX Burst Interface</name> + <key>gsm_trx_burst_if</key> + <import>import grgsm</import> + <make>grgsm.trx_burst_if($remote_addr, $base_port)</make> + + <param> + <name>base_port</name> + <key>base_port</key> + <value>5700</value> + <type>string</type> + </param> + + <param> + <name>remote_addr</name> + <key>remote_addr</key> + <value>127.0.0.1</value> + <type>string</type> + </param> + + <sink> + <name>bursts</name> + <type>message</type> + <optional>1</optional> + </sink> + + <source> + <name>bursts</name> + <type>message</type> + <optional>1</optional> + </source> + + <doc> + OsmoTRX like UDP burst interface for external applications. + + There are two UDP connections, where each message carries + one radio burst with header. Give a base port B (5700 by default). + One connection at port P=B+100+2 is used for sending received bursts + to an external application. Another one at port P=B+2 is used to + obtain to be transmitted bursts. + + Received burst format: + 1 byte timeslot index + 4 bytes GSM frame number, big endian + 1 byte RSSI in -dBm + 2 bytes correlator timing offset in 1/256 symbol steps, + 2's-comp, big endian + 148 bytes soft symbol estimates, 0 -> definite "0", + 255 -> definite "1" + + To be transmitted burst format: + 1 byte timeslot index + 4 bytes GSM frame number, big endian + 1 byte transmit level wrt ARFCN max, -dB (attenuation) + 148 bytes output symbol values, 0 & 1 + </doc> +</block> |