Lattice Semiconductor has developed three new Intellectual Property (IP) core and reference design products targeting the wireless communications market.
The products include RF/IF processing functionality, as well as upgraded support for industry-standard base station connectivity protocols. The designs are optimised to run on the LatticeECP2M FPGA family in order to provide complete, low cost wireless base station solutions.
The three designs include a digital up/down conversion reference design (DDC/DUC) and IP cores supporting two popular industry standard baseband interface protocols, the Open Base Station Architecture Initiative (OBSAI-RP3-01) and the Common Public Radio Interface (CPRI). The DDC/DUC is a single channel, WiMAX reference design that leverages the embedded DSP blocks of the LatticeECP2M fabric to provide a highly integrated RF card solution. The DUC/DDC package also automatically configures the Lattice ispLeverCORE IP cores for the finite input response (FIR) filter and numerically controlled oscillator (NCO) functions.
Both IP cores have been recently updated to address the expanding landscape of remote radio head base station deployments. The CPRI core is compliant with v3.0 of the specification, supporting 614M, 1,2 and 2,4 Gbps data rates by virtue of the embedded SERDES channels in the LatticeECP2M FPGAs. The IP core has also been upgraded to address the concerns of latency variation and enhanced Fast C&M Ethernet control plane requirements that are required for multihop remote topologies.
The OBSAI core has been updated to support v4.0 of the specification, which adds a protocol overlay called RP3-01 to the preceding version in order to address the needs of a remote base station topology. Enhancements to the transport layer include support for the mapping of RP1 control plane data into an RP3 message, reducing connectivity by allowing both data and control plane messaging to be delivered over a common RP3 electrical link. Also offered is a mux/demux capability that further aids in the aggregation and distribution of multiple OBSAI links.
Lattice offers development boards and demonstrations to further aid in the design cycle process.
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