In the following end-market pages, Altera provides all the design tools and information systems that you need to implement your communications system applications using Altera® products:
Wireless infrastructure standards define an interface between the radio equipment control and the radio equipment in wireless basestations. Most common interfaces are Open Base Station Standard Initiative (OBSAI) RP3 and Common Protocol Radio Interface (CPRI).
Digital IF Processing
Digital intermediate frequency (IF) extends the scope of digital signal processing (DSP) beyond the baseband domain out to the antenna—to the RF domain. This increases the flexibility of the system while reducing manufacturing costs. Moreover, digital frequency conversion provides greater flexibility and higher performance (in terms of attenuation and selectivity) than traditional analog techniques.
Digital communications standards, especially wireless, are continuously evolving to support higher data rates through the introduction of advanced baseband processing techniques such as adaptive modulation and coding, space-time coding (STC), beamforming, and multiple-input multiple-output (MIMO) antenna techniques.
The baseband signal processing devices require enormous processing bandwidth to support such computationally intensive algorithms. It often requires both DSP processors and FPGAs, where the processor handles system control and configuration functions while the FPGA implements the computationally-intensive signal processing datapath and control, to minimize the latency in the system.