fixes for precoding (turning off if nb_antennas_tx=1), configuration files, timing advance with 3/4 sampling on 20 MHz, logging in MAC

Result of testing as eNodeB. modifications for .vcd logging, bugfix in eNB_thread_FH (subframe counter), update of .conf file for new threading parameters. Updates to gtkwave configuration file for new threading.

added Timing advance tracing to .vcd output. Increase maximum UL RB count to 45. Measured UL throughput @ 15 Mbit/s (40 PRBs).

added configuration file for lowband of SoDeRa

increase maximum users in eNodeB to 16

some changes in logging for XFORMS and UL scheduling (activation in all subframes and retransmissions only via PHICH)

handling of timing advance is improved. MAC retrieves timing advance from phy once prior to DL scheduling and clears the statistic in PHY. A timer for controlling the timing advance periodicity was introduced.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7800 818b1a75-f10b-46b9-bf7c-635c3b92a50f

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7670 818b1a75-f10b-46b9-bf7c-635c3b92a50f

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git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6025 818b1a75-f10b-46b9-bf7c-635c3b92a50f

fixed bug in lte-softmodem for USRP and other minor updates
other small fixes
tested on EXMIMO and USRP



git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5936 818b1a75-f10b-46b9-bf7c-635c3b92a50f

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git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5906 818b1a75-f10b-46b9-bf7c-635c3b92a50f