Changes between Version 75 and Version 76 of OFDMReferenceDesign/Changelog

Timestamp:

Feb 17, 2011, 4:06:36 PM (13 years ago)

Author:

murphpo

Comment:

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OFDMReferenceDesign/Changelog

@@ -15 +15 @@
 The OFDM Reference Design now includes channel coding. The PHY implements a K=7 convolutional code with support for four code rates (1/2, 2/3, 3/4 and 1). This is the same code used by 802.11a/g. When coding is enabled, packet headers are sent as 1/2 rate coded QPSK, and payloads are encoded according to the codeRate field in the header. The payload code rate is configured per-packet; the receiver configures its decoder based on the codeRate field in the header. Payloads can be modulated with BPSK, QPSK or 16-QAM (all 12 combinations of payload modulation/code rate are supported).
 
-The PHY is identical for FPGA v1 and v2. The same .mdl file (ofdm_txrx_supermimo_coded.mdl) is used to generate the pcores for both versions. The only difference is the target device selected in the System Generator token (XC2VP70-FF1517-6 for v1 and XC4VFX100-FF1517-11 for v2). 
+The PHY is identical for FPGA v1 and v2. The same .mdl file ([source:/ResearchApps/PHY/MIMO_OFDM/ConvCoded ofdm_txrx_supermimo_coded.mdl]) is used to generate the pcores for both versions. The only difference is the target device selected in the System Generator token (XC2VP70-FF1517-6 for v1 and XC4VFX100-FF1517-11 for v2). 
 
 Because of limitations in the number of multipliers in the Virtex-4 FPGA, the decimation filters in the rate_change_filters pcore use non-embedded multipliers (i.e. implemented in fabric) in the v2 design. The rate_change_filter source model is in the repository ([source:/ResearchApps/PHY/MIMO_OFDM/Rate%20Change%20Filters /ResearchApps/PHY/MIMO_OFDM/Rate Change Filters]), along with a .m script which enables/disables embedded multipliers in the decimation filters.