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Abstract: Next-generation base stations deploying MIMO and Active Antenna features present a design challenge in terms of managing the latency/synchronization and interconnect between signal processing elements and multiple high-speed converter devices within the radio. The JESD204 and JESD204A specifications provide a solution for managing the interconnect with the use of high-speed serial links, thereby providing a reduction in board complexity and power consumption compared to traditional parallel based converter interfaces.
The ability to accurately control the delay through the JESD204 link is one of the key additions to the JESD204B specification. Along with careful component selection and board design, JESD204B allows system implementors to design radio subsystems for MIMO and AAS designs while achieving fixed latency with zero cycle uncertainty across the JESD204B link.
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