CPRI
The Common Public Radio Interface (CPRI) is an initiative to define a publicly available specification that standardizes the protocol interface between the radio equipment control (REC) and the radio equipment (RE) in wireless basestations. CPRI allows the use of a distributed architecture where basestations, containing the REC, are connected to remote radio heads via lossless fibre links that carry the CPRI data.
eASIC and Radiocomp now offers a complete easy-to-use intellectual property (IP) core for building CPRI v4.1 and lower interfaces to speed development time and allow you to focus on product differentiation. The IP core uses eASIC’s low power 6.5 Gbps MGIO transceivers to implement the CPRI Physical Layer and provides a compact and customizable Data Link Layer implemented in the eASIC logic fabric.
Features
- Highly configurable
- Built-in support for CPRI v4.1 REC and backwards compatible mapping methods
- REC mode configuration support
- Programmable line rates up to 6.144 Gbps as introduced in CPRI specification v4.1
- Support for basic and advanced IQ data mapping modes
- Up to 32 antenna carriers per IP core
- 16-bit and lower sampling widths
- Integrated 10/100 Ethernet MAC and HDLC controllers for control and management layers
- WiMAX and WDCMA/LTE mapping support. Mapping
support for other standards is opti onal. - Auxiliary port can be used to enable multi-hop system topologies
- Source code license available for additional fee
- Easy to use
- Portable design to enable easy migration from FPGA to eASIC
- Accurate delay measurement and calibration
- Included test bench guides you through the operation of typical system configuration and provides example code for common CPRI start-up sequences
The following diagram shows a high-level block diagram for Radiocomp and eASIC CPRI IP solution.
