Logic Design for Digital Communication

Development of Standards Based Physical Layer Modulators and Demodulators
in FPGA or ASIC

Modulation Formats:  OFDM QAM QPSK 8-VSB GSM CPM, PCM-FM

Capabilities: Viterbi Decoding, Reed Solomon Decoding, Variable Rate Filtering, Carrier
Recovery, Symbol Timing Recovery, Channel Estimation, Equalization, Synchronization,
trellis demodulation

Standards:  IEEE 802.16 (WIMAX)  DVB-S, DVB-C,  ATSC, DVB-H,  GSM/GPRS, GPS,
WIMEDIA,  ARTM PCM-FM (tier 0) ,  ARTM SOQPSK-TG (tier 1)

System Analysis, Simulation and Algorithm Development:   Matlab

Implementation:  Altera Quartus, Verilog, Matlab
Michael Paff
consultant

Mr Paff has extensive experience in developing baseband hardware for satellite
communication, cable modems, cellular and fixed wireless systems.  He is capable in system
design, modulator/demodulator implementation and forward error correction
implementation.  He holds patents in the areas of cable modem and satellite receiver and
OFDM technology.  He has participated in cable modem standards process and IEEE
802.16a standards activity.  He has a BSEE from Bucknell University and an MSEE from
Syracuse University.

Mr Paff is a strong believer in FPGA verification of complex communication algorithms.  In
fact, FPGAs have replaced full ASIC in many communication applications with lower cost
and shorter design time.  Mr. Paff has developed a large inventory of communication IP
based on Altera technology.  This IP is based on Verilog and is easily ported to other
technology.

Mr Paff can augment your design team by providing existing logic IP cores for modules such
as Viterbi Decoder, Reed Solomon, OFDM modulator/demodulator, variable rate RRC filter,
trellis demodulator or ATSC transmitter.  He can implement a custom module to your
specifications.  He can provide system engineering support or help troubleshoot immediate
problems.
Paff Engineering
mpaff@paffengineering.com
650 941 2954 or 650 704 9645 (cell)                                                                                                                                     Los Altos CA 94024
Algorithm Development
Modeling & Simulation
Logic Implementation
Prototype Development
Prototype printed circuit board development
Digital Modulators  and Digital Demodulators
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