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path: root/Transceiver52M/Transceiver.h
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2016-06-22transceiver: Add an option to emulate a RACH delay in random filler mode.Alexander Chemeris1-2/+2
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2016-06-22transceiver: Log channel number in DEBUG output of demoded bursts.Alexander Chemeris1-1/+1
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2016-04-26transceiver: Do not pass transceiver state struct to function where it's not ↵Alexander Chemeris1-2/+2
used.
2016-04-20transceiver: Add an option to generate random Access Bursts.Alexander Chemeris1-0/+1
2016-04-20transceiver: Properly handle MAXDLY.Alexander Chemeris1-1/+2
Previously MAXDLY value was applied to Normal Bursts, which was nice when working with sloppy test equipment like CMD57, but useless for real world usage. At the same time documentation and de facto usage of MAXDLY in OsmoBTS and OpenBTS assumed that it actually applies to Access Bursts (RACH). So this patch changes osmo-rx behavior to apply MAXDLY to RACH bursts and introduces a new command MAXDLYNB for the old behavior.
2016-03-08EDGE: Add random burst generator filler optionTom Tsou1-1/+2
When EDGE is enabled with the '-e' option, the random burst generator switches from GMSK normal bursts to 8-PSK EDGE bursts. $ ./osmo-trx -e -r 7 Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2016-03-08EDGE: Add interfaces to enable EDGE transceiverTom Tsou1-1/+4
Create EDGE slot type in the Transceiver. When EDGE mode is enabled for a particular slot, blind detection will be performed by correlating against EDGE followed by normal bursts if no EDGE burst is found. Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2016-03-06EDGE: Setup variable sampling on receive pathTom Tsou1-1/+1
Allow setting the device to non single SPS sample rates - mainly running at 4 SPS as the signal processing library does not support other rates. Wider bandwith support is required on the receive path to avoid 8-PSK bandlimiting distortion for EDGE. Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2016-03-06sigproc: Remove normal burst DFE equalizerTom Tsou1-14/+7
DFE equalizer is unused and has been experiencing code rot for multiple years. The effect is a significant amount of baggage being carried in the Transceiver and interfaces. Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2015-07-30Transceiver: Add support for OsmoBTS style handover.Alexander Chemeris1-0/+1
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2015-07-30Transceiver: Fix whitespace.Alexander Chemeris1-2/+2
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2015-07-30transceiver: Add a debug option to dump selected timeslots to disk.Alexander Chemeris1-0/+1
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2015-07-30Transceiver: Update noise level only when the timeslot is marked as IDLE.Alexander Chemeris1-1/+1
We can't rely on an assumption that if we can't decode a burst - it's noise. There are many rasons why we can't decode a burst even if it's well above the noise level. Just one example is a RACH burst which can be overlapped with another RACH burst up to a level both are completely unrecognizable. Another example is when a burst is destroyed by bad multi-path. Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2015-07-30Transceiver: Fix clipping detection.Alexander Chemeris1-6/+6
There are two primary changes in this commit: 1) Return values of detect functions changed form bool to int to actually pass the return value from the inner function and notify higher levels about clipping. Previously the information was lost due to conversion to bool. 2) Clipping level is not the final verdict now. We still try to demod a burst and mark it as clipped only if the level is above the clipping level AND we can't demod it. The reasoning for this is that in real life we want to do as much as possible to demod the burst, because we want to get as much from our dynamic range as possible. So a little bit of clipping is fine and is expected. We just don't want too much of it to break our demod. Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2015-07-30Transceiver: Print noise level for each burst in debug mode.Alexander Chemeris1-1/+2
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2015-07-30osmo-trx: Add a command line option for the dBFS to dBm offset.Alexander Chemeris1-6/+9
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
2015-05-24osmo-trx: Fix random filler command line option.Alexander Chemeris1-1/+1
Filler types was of "bool" type, which prevented it from taking values greter than 1. And RAND filler type has integer value of 2, which was casted to 1 on assigning, which led to a normal filler table being used instead of the RAND one.
2015-05-19test: Add command line random normal burst optionTom Tsou1-64/+68
2014-12-15Transceiver52M: Implement POWEROFF commandTom Tsou1-5/+11
Add stop and restart capability through the POWEROFF and POWERON commands. Calling stop causes receive streaming to cease, and I/O threads to shutdown leaving only the control handling thread running. Upon receiving a POWERON command, I/O threads and device streaming are restarted. Proper shutdown of the transceiver is now initiated by the destructor, which calls the stop command internally to wind down and deallocate threads. Signed-off-by: Tom Tsou <tom@tsou.cc>
2014-12-15Transceiver52M: Allow setting gain before POWERONTom Tsou1-1/+3
There is no reason gain settings should not be modifiable when the radio is running or not. Signed-off-by: Tom Tsou <tom@tsou.cc>
2014-01-26Transceiver52M: Disable filler table retransmissions by defaultThomas Tsou1-2/+6
Burst selection at a particular time works in the following order of priority. 1. Slot is disabled with channel combination set to NONE (default) 1. Burst exists in priority queue for the current time. 2. Filler table entry is used This patch sets default behaviour to force all filler table entries to zero and disallows filler table changes. This effectively means that only bursts received from upper layers will be transmitted and nothing will be automatically transmitted in the absence or delay of incoming burts at a particular time. New Command line option "Enable C0 filler table" allows reverting to previous idle burst generation and retransmission behaviour on TRX0. Retransmission cannot be enabled on non-C0 channels. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-16Transceiver52M: Create new osmo-trx executableThomas Tsou1-0/+3
Create new main executable with full command line option parsing of relevant parameters. Database configuration table still exists (and must exist because of the global gConfig object), but can be bypassed with command line options. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-15Transceiver52M: Use independent noise vectors for each channelThomas Tsou1-3/+4
Each ARFCN channel may be independently configureted and possibly on separate hardware, so don't share a single vector for noise estimate calculations. Allow a non-pointer based iterator so we can get away with using the default copy constructor. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-15Transceiver52M: Refactor receive path outer burst handlingThomas Tsou1-0/+16
Separate the large pullRadioVector() call, which forms the central portion of the receive path burst processing. Break out RACH, normal burst, and demodulation into separate methods. This makes the burst handling from the FIFO read to soft bit output somewhat more manageable. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-15Transceiver52M: Add vectorized radio burst capabilityThomas Tsou1-1/+1
This patch allows multiple signalVectors to be stored within a single radioVector object. The motivation is to provide a facility for diversity and/or MIMO burst handling. When no channel value is specified, single channel bevhaviour is maintained. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-15Transceiver52M: Set variable thread priority levelsThomas Tsou1-1/+1
The transceiver and underlying device drivers are threaded. use the following priority levels. 0.50 - UHD driver internal threads 0.45 - Receive device drive thread 0.44 - Transmit device drive thread 0.43 - UHD asynchronous update thread (error reporting) 0.42 - Receive burst processing thread(s) Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-15Transceiver52M: Add multi channel transceiver supportThomas Tsou1-39/+49
This patch primarily addresses devices with multiple RF front end support. Currently device support is limited to UmTRX. Vectorize transceiver variables to allow multiple asynchronous threads on the upper layer with single downlink and uplink threads driving the UHD I/O interface synchronously. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-08Transceiver52M: Separate transceiver per-slot state informationThomas Tsou1-31/+69
Collect the slot information into an indpendent state object. This will allow us to easily create multiple instances of internal state variables without having to replicate the transceiver object itself. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-08Transceiver52M: Delay socket allocation to heapThomas Tsou1-5/+5
For multiple transceiver connections, it is inappropriate to allocate all sockets in the transceiver constructor due to not knowing how many connections are avaialble in advance and for error checking purposes. Instead, store the base socket address port combination and setup the sockets in the initialization call. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-11-08Transceiver52M: Remove transmit logging optionThomas Tsou1-15/+0
The current status and operability of this compile option is unknown. Remove due to lack of use, demand, and maintenance. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-10-18Transceiver52M: Update noise measurement calculationThomas Tsou1-2/+2
Previous removal of the energy detector requirement broke the noise level calculation loop. The previous adaptive approach was finicky - noticably at high gain levels. Since we no longer use the energy threshold for primary burst gating, we can return to a simpler world. In the new approach, we compute a running average of energy levels and track them with a noise vector. A timeslot that passes the correlator threshold is a valid burst. These are not used in the noise calculation. Everything else is considered noise and used to compute the noise level with respect to full scale input level, which for almost all supported devices is 2^15. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-10-18Transceiver52M: Setup dual sample rate transceiverThomas Tsou1-1/+2
This patch applies oversampling, when selected with 4 sps, to the downlink only, while running the receiver with minimal sampling at 1 sps. These split sample rates allow us to run a highly accurate downlink signal with minimal distortion, while keeping receive path channel filtering on the FPGA. Without this patch, we oversample the receive path and require a steep receive filter to get similar adjacent channel suppression as the FPGA halfband / CIC filter combination, which comes with a high computational cost. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-10-18Transceiver52M: Separate main transmit and receive drive threadsThomas Tsou1-4/+8
This patch primarily addresses observed repeated overrun conditions in embedded environments - namely ARM. The heartbeat of the transceiver is derived from the receive sample stream, which drives the main GSM clock. Detach the transmit thread from the receive loop to avoid interfering with the receive I/O, which is sensitive to overrun conditions if pull process is interrupted. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-10-18Transceiver52M: Make GSM pulse filter internal to implementationThomas Tsou1-2/+1
There is no reason expose the pulse shaping filter outside of the signal processing calls. The main transceiver object makes no use of the filter and there's no reason to pass it around. Initialize the pulse shape with the signal processing library, and maintain an internal static member like many of the other library variables. Similarly destroy the object when the library is closed. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-10-18Transceiver52M: Rename samples-per-symbol variable namesThomas Tsou1-3/+3
Because repeatedly typing mSamplesPerSymbol is giving me carpal tunnel syndrome. Replace with the much shorter, easier to type, and just as clear name of 'sps'. Signed-off-by: Thomas Tsou <tom@tsou.cc>
2013-06-15Transceiver52M: Add more complete specification of GPRS typesttsou1-5/+7
Submitted by: Ivan Kluchnikov <kluchnikovi@gmail.com> Signed-off-by: Thomas Tsou <tom@tsou.cc> git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@5690 19bc5d8c-e614-43d4-8b26-e1612bc8e597
2013-06-15Transceiver52M: Add GPRS combinations to correlation typesttsou1-1/+5
Submitted-by: Andreas Eversberg <jolly@eversberg.eu> Signed-off-by: Thomas Tsou <tom@tsou.cc> git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@5677 19bc5d8c-e614-43d4-8b26-e1612bc8e597
2011-11-26uhd: inline thread priority settingkurtis.heimerl1-1/+4
Push the ability to set thread priority out to the 52M Transceiver interface, because that's where the thread control exists. Signed-off-by: Thomas Tsou <ttsou@vt.edu> git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@2644 19bc5d8c-e614-43d4-8b26-e1612bc8e597
2011-10-12Adding in the missing Transceiver52M directorydburgess1-0/+207
git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@2307 19bc5d8c-e614-43d4-8b26-e1612bc8e597
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