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diff --git a/Transceiver52M/README b/Transceiver52M/README deleted file mode 100644 index 491693c..0000000 --- a/Transceiver52M/README +++ /dev/null @@ -1,35 +0,0 @@ -The Transceiver - -The transceiver consists of three modules: - --- transceiver - --- radioInterface - --- USRPDevice - -The USRPDevice module is basically a driver that reads/writes -packets to a USRP with two RFX900 daughterboards, board -A is the Tx chain and board B is the Rx chain. - -The radioInterface module is basically an interface b/w the -transceiver and the USRP. It operates the basestation clock -based upon the sample count of received USRP samples. Packets -from the USRP are queued and segmented into GSM bursts that are -passed up to the transceiver; bursts from the transceiver are -passed down to the USRP. - -The transceiver basically operates "layer 0" of the GSM stack, -performing the modulation, detection, and demodulation of GSM -bursts. It communicates with the GSM stack via three UDP sockets, -one socket for data, one for control messages, and one socket to -pass clocking information. The transceiver contains a priority -queue to sort to-be-transmitted bursts, and a filler table to fill -in timeslots that do not have bursts in the priority queue. The -transceiver tries to stay ahead of the basestation clock, adapting -its latency when underruns are reported by the radioInterface/USRP. -Received bursts (from the radioInterface) pass through a simple -energy detector, a RACH or midamble correlator, and a DFE-based demodulator. - -NOTE: There's a SWLOOPBACK #define statement, where the USRP is replaced -with a memory buffer. In this mode, data written to the USRP is actually stored -in a buffer, and read commands to the USRP simply pull data from this buffer. -This was very useful in early testing, and still may be useful in testing basic -Transceiver and radioInterface functionality. |