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These issues can be addressed with the use of two special signal processing functions to precondition the RF signal to amplify - Crest Factor Reduction (CFR) and Digital Predistortion (DPD). However, near antenna logic for MIMO-based RRH systems were implemented using high end, premium FPGAs which typically resulted in high power and cost forcing vendors to sacrifice design flexibility and attempt expensive ASIC conversions.
This solution supports the integration of all RRH processing into a single mid-range, low-power, low-cost LatticeECP3 FPGA device. The solution also delivers the lowest dynamic power for programmable logic DPD solution at 400mW per antenna. This makes it ideal for various wireless applications including WCDMA, LTE, WiMAX/WiBro, TD-SCDMA, DVB-T/S/H.
Ordering InformationFor more information on the RRH solution or for pricing and availability please contact Affarii. |
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In a Distributed Base Station architecture the Baseband is connected to the Remote Radio Head (RRH) located near the antenna using high speed optical link in order to reduce site costs while allowing for flexible upgrades. The RRH is responsible for converting digital data on the optical link to RF carriers for radio transmission and reception. 
Power consumption and cost of the RF Power Amplifier (PA) are two of the biggest concerns vendors have. High signal peak to average power ratio (PAPR) requires the PA to transmit high power levels very infrequently adding significantly to the amplifier cost. RF transistors also exhibit non-linearity at high power levels resulting in signal distortion and out of band emissions.
Affarii’s unique digitalTRX™ technology provides vendors an unprecedented RRH solution that includes:
Factory Configurable
IPexpress User Configurable
Standard Configurable