Synopsys has added Time Division Duplex (TDD) mode to their Long-term Evolution (LTE) Model Library for physical layer system simulation. TDD mode helps developers of semiconductors for LTE network equipment and devices to quickly and reliably extend designs to support the third Generation Partnership Project (3GPP) LTE standard. The TDD-enhanced LTE Model Library is available now for use in SPW. Support for System Studio will be available this year. Existing licensees of the LTE Model Library will receive the TDD enhancement as a regular maintenance update.