AD9375 数字预失真
适用于小蜂窝和大规模 MIMO 的 AD9375
在从 4G 过渡到 5G 的过程中，小蜂窝和大规模 MIMO 基站的部署对系统功率、尺寸和成本提出了越来越高的要求。凭借对市场机遇和技术难题的深入洞悉，ADI 工程师预见到了准 5G 无线通信所面临的电源扩展问题，并制定出以下解决方案：AD9375 是全球首款带有集成数字预失真 (DPD) 功能的宽带 RF 收发器。
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The AD9375
The AD9375 is the first RF transceiver to incorporate the digital pre-distortion algorithm on-chip. Building on the foundations laid by the award winning AD9371, the AD9375 adds a DPD solution that reduces DPD power by 90% over FPGA based solutions and cuts the number of SERDES lanes in half, reducing FPGA complexity and cost. The power savings, integration and system cost reduction make it an ideal solution for low-power, small form factor applications such as small cell and massive Multiple-Input Multiple-Output (MIMO). Meanwhile, ADI’s RadioVerse offers a robust design ecosystem that enables faster time to market, including a tested PA library, a small cell reference design, and an evaluation kit. The AD9375 integrated DPD solution supports 3G and 4G waveforms with an instantaneous signal bandwidth of up to 40MHz.
AD9375 概览
了解 AD9375 DPD 解决方案如何减小系统外形尺寸，降低功耗和成本，同时提供出色的易用性并简化部署。
AD9375 的特性和优势
超低功耗 DPD
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两个发射器的功耗低于 100mW – 是其他基于 FPGA 的解决方案的十分之一
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DPD 算法针对受功率和区域限制的 3G/4G 小蜂窝和大规模 MIMO 应用场合（最高带宽 40MHz）进行了优化
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支持使用高效功率放大器 (PA) 来降低系统功耗
高度集成的通用解决方案
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智能系统分区:DPD 的集成降低了接口带宽，将 SERDES 线路数量减少了 50%，同时降低了系统功耗并缩小了外形尺寸
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通用性：提供适用于小蜂窝和大规模 MIMO 应用场合的通用平台设计，覆盖从 300MHz 到 6GHz 的所有 3GPP 频段
Ease of Use
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Complete development toolkit to accelerate time to market
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Library of tested power amplifiers from leading vendors
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Detailed user guides, complete application program interface (API), Control GUIs
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Evaluation kit with power amplifier daughtercard Complete 2x2 LTE 250mW small cell radio reference design
Reduced FPGA Size and Cost
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The AD9375 is the first RF transceiver to incorporate the digital pre-distortion (DPD) algorithm on-chip – a design breakthrough that reduces DPD power consumption by 90 percent with performance optimized for Small Cell and Massive MIMO applications
AD9375 评估系统
使用带有 AD9375 DPD 功能的 ADRV9375 评估系统。
AD9375 小蜂窝无线电参考设计
AD9375 小蜂窝无线电参考设计是一种完整的 JESD204B 对天线无线电解决方案，可助您加快上市速度。集成了无线电所需的所有组件，包括 AD9375 收发器、PA、LNA 和电源解决方案，此参考设计支持 2x2 20MHz LTE，每个天线的输出功率为 250mW。
通过下载和查看AD9375设计文件包，在设计过程中迈出第一步。
功率放大器测试报告
ADI与全球领先的功率放大器供应商携手，凭借AD9375 DPD优化高效率PA的线性化性能。PA测试报告以及不同的输出功率和频率如下所示。
| PA 供应商 | 零件号 | 工作频率范围 (MHz) | 增益 (dB) | 效率 (%) | 平均 Pout (dBm RMS) | 测试的带宽 (MHz) | 报告链接 |
| Huatai | HTN7G21P160H | 1805-1880 | 14 | 32 | 42 | 20 | |
| Huatai | HTN7G21P160H | 2110-2170 | 15 | 29 | 42 | 20 | |
| NXP | A2I25D025GN | 2300-2400 | 28-29 | 38-40 | 38 | 20, 40 | |
| NXP | A2I25D025GN | 2496-2690 | 28-29 | 38-40 | 38 | 20, 40 | |
| Richardson | DE705 | 758-803 | 55 | 45 | 39.5 | 10, 20 | |
| Skyworks | SKY66297-11 | 2496-2690 | 32 (最小值) | 32 | 28 | 20 | |
| Skyworks | SKY66292-11 | 2300-2400 | 35.5 | 36.6 | 28 | 20 | |
| Skyworks | SKY66295-11 | 850-900 | 33 (最小值) | 35 | 27 | 10 | |
| Skyworks | SKY66296-11 | 700-800 | 34 (最小值) | 36 | 28 | 10 | |
| Skyworks | SKY66288-11 | 5150-5925 | 34.5 (最小值) | 28.4 | 28 | 20 | |
| Skyworks | SKY66294-11 | 2100-2200 | 36 (最小值) | 33 | 28 | 20 | |
| Skyworks | SKY66293-21 | 3400-3800 | 33.5 (最小值) | 27 | 28 | 20 | |
| Skyworks | SKY66391-12 | 1800-1900 | 36 | 35 | 28 | 40, 60* | |
| Skyworks | SKY66394-11 | 2110-2170 | 35 | 34 | 28 | 40 | |
| Skyworks | SKY66397-12 | 2496-2690 | 35 | 31 | 28 | 40 | |
| Skyworks | SKY66399-11 | 1900-2000 | 36.5 | 35 | 28 | 40 |
*ADI仅支持高达40MHz线性化带宽的AD9375 DPD。
NanoSemi 开发出突破性数字补偿器 IP，从而实现了无线无线电、数字转换器和光收发器等非线性动态系统的线性化。其性能，特别是频谱效率和低功耗性能可为客户在仪器仪表、便携和通信器材市场上提供显著的竞争优势。