RSoft suite incorporates MMSE DFE EDC and advanced D(Q)PSK models

July 17, 2007
JULY 17, 2007 -- RSoft's Optical Communication Design Suite version 4.7 includes a new DFE/FFE EDC model with MMSE criterion coefficient optimization and advanced D(Q)PSK models for bit rates up to 100 Gbits/sec and beyond, say company representatives.

JULY 17, 2007 -- RSoft Design Group (search for RSoft), provider of photonics design automation software, today announced the release of its Optical Communication Design Suite version 4.7, which includes OptSim and its multimode companion ModeSYS. The new release includes a new decision-feedback equalizer/feedforward-equalizer (DFE/FFE) electronic dispersion compensation (search for EDC) model with minimum mean square error (MMSE) criterion coefficient optimization and advanced Differential (Quadrature) Phase-Shift Keying (search for DQPSK) models for bit rates up to 100 Gbits/sec and beyond, claim company representatives. RSoft says it is the first to introduce such critical models to optical communication design.

With this new DFE EDC with automatic coefficient optimization model, OptSim becomes the ideal framework to design and simulate multimode and singlemode systems deploying EDC at the receiver, based on standards such as 10GBASE-LRM and ITU G.959.1, claim RSoft representatives. The model enables OptSim 4.7 users to specify many options, including the number of feed-forward and feedback taps. When the number of feedback taps is equal to zero, the model degenerates into a FFE EDC. The coefficients also can be manually inserted so that users can perturb their optimal value to study the system resilience to sub-optimal EDC.

Advanced D(Q)PSK is an increasing important modulation format, currently the only technology capable of reaching a single-channel serial bit rate of 100 Gbits/sec and beyond, says RSoft. OptSim 4.7 has several capabilities that can be used to further investigate D(Q)PSK system design, including new transmitters, receivers, and BER models, as well as its accurate nonlinear fiber model.

Other notable highlights within OptSim 4.7 include new Liekki Application Designer interface for device-level fiber laser/amplifier simulation inside a system simulation, updated Jones Matrix Transfer Function model to support latest Luna Technology's measurement files, and a new Compact Transient EDFA model. Other graphical user interface (GUI) and framework enhancements include a new Application Gallery for conveniently organizing built-in examples and user-designed project files, direct access to application notes from project layout, and enhanced project archiving wizard. In addition, OptSim 4.7 officially supports the latest Microsoft Vista Operating System, reports the company.

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