AR# 29448

描述

• New Features
• Supported Devices
• Resolved Issues
• Known Issues

解决方案

• If my input data is very regular and I do not see the expected Bit Error Rate, what can I do? See (Xilinx Answer 22374).
• How do I calculate the data rates for the LogiCORE Viterbi Decoder operating in various configurations? See (Xilinx Answer 22641).

LogiCORE Viterbi Decoder v8.0

• Initial Release in ISE 13.4

New Features

• ISE 13.4 software support
• AXI interface

Supported Devices

• Zynq-7000*
• Virtex-7 XC XT/HT/T
• Virtex-7 -2L XC XT/T
• Virtex-6 XC CXT/LXT/SXT/HXT
• Virtex-6 XQ LXT/SXT
• Virtex-6 -1L XQ LXT/SXT
• Virtex-6 -1L XC LXT/SXT
• Kintex-7 XC
• Kintex-7 -2L XC
• Artix-7 XC
• Spartan-6 XC LX/LXT
• Spartan-6 XA
• Spartan-6 XQ LX/LXT
• Spartan-6 -1L XQ LX
• Spartan-6 -1L XC LX

Resolved Issues

• None

Known Issues

• None

LogiCORE Viterbi Decoder v7.0

• Initial Release in ISE 11.2

• ISE 11.2 software support
• Virtex-6 and Spartan-6 FPGA support
• Asynchronous reset input removed
• Speed option for Virtex-5 FPGA removed

• CR442529: Design fails when two Viterbi Decoders are instantiated on a Virtex-5 device
• Naming conflict on packing caused failure in the mapper.

• CR 580351 - Why am I unable to change the traceback length in the GUI for the IP CORE Generator 12.3? See (Xilinx Answer 38797).

• Initial Release in ISE 9.2i IP Update 2

• ISE 9.2i software support

• CR442529: Design fails when two Viterbi Decoders are instantiated on a Virtex-5 device
  • Naming conflict on packing caused failure in the mapper
• BER performance with best state on Virtex-5
  • Best state selection was not optimal
• CR449260: Packet Options
  • Incorrect delay on packet start signal

• How can I extend the data format for soft coding beyond the three bits listed in table 1 of the Viterbi data sheet? See (Xilinx Answer 29940).
• Why does the latency in simulation not tie up with the latency equations in the data sheet? See (Xilinx Answer 31263).
• How can the latency for the core be determined? See (Xilinx Answer 31275).

• Initial Release in ISE 9.1i IP Update 3

• Support added for:
  • Spartan-3A DSP
  • ISE 9.1i

• CR 431791 : For constraint length 9, the BER performance is not optimal at high SNR; the BER plot shows an error floor
• CR 435735 : In serial mode, if the ND signal is not periodic, the Viterbi Decoder v6.0 does not work correctly

链接问答记录

子答复记录