RF-Baseband Serial Interface for High-Speed Low-Power Links
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Solution Overview
Problem
Current wireless communication systems require complex redesigns and are energy inefficient due to the need for high-speed, low-overhead serial digital interfaces between RF IC chips and baseband IC chips, especially for multi-standard and multi-band transceivers.
Innovation Solution
A device providing a serial digital interface between an RF IC chip and a baseband controller, featuring analog-to-digital converters, serializers, deserializers, digital-to-analog converters, and a control module, which converts signals between analog and digital domains and manages power efficiently using a serial peripheral interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high-speed serial digital interface is implemented between RF IC chip and baseband IC chip, then data transfer speed is improved, but device complexity and power consumption increase
Solution Approach 1:
The interface is segmented into distinct functional blocks including ADC, DAC, serializer, and deserializer, each handling specific signal processing tasks. This segmentation allows for modular design and reduces overall interface complexity while maintaining high-speed data transfer capability between RF and baseband chips.
Solution Approach 2:
An intermediary interface chip is introduced between the RF IC chip and baseband IC chip to handle the complex serial digital interface functions. This intermediary contains the ADC, DAC, serializer, and deserializer, thereby simplifying the RF and baseband chip designs while enabling high-speed communication.
2Speed
If a high-speed serial digital interface is implemented between RF IC chip and baseband IC chip, then data transfer speed is improved, but power consumption increases
Solution Approach 1:
The interface employs periodic clock signaling and structured data framing with idle cycles, allowing the system to enter low-power states during periods of reduced activity while maintaining readiness for high-speed data transfer when needed, thus balancing speed requirements with power consumption.
3Adaptability or versatility
If complex redesign of RF IC chip and baseband chip is performed to meet multi-standard requirements, then adaptability is improved, but device complexity increases
Solution Approach 1:
The interface chip is designed with universal functionality to support multiple wireless communication standards including GSM, W-CDMA, Wi-Fi, and LTE. By consolidating the multi-standard interface logic in a separate dedicated chip, the RF and baseband chips can maintain simpler designs while the interface chip provides the necessary adaptability across different standards through its configurable ADC, DAC, serializer, and deserializer blocks.
Data Source
AI summary
One embodiment of the present invention provides a device for interfacing between a baseband controller and an RF integrated circuit (IC) chip having a modulator and a demodulator. The device includes an analog-to-digital converter (ADC) coupled to the demodulator located on the RF IC chip. The ADC is configured to receive demodulated analog signals from the demodulator. The device further includes a serializer configured to generate a serial data frame based on the ADC's output, a first serial data port configured to send the serial data frame to the baseband controller, and a control module coupled to the baseband controller.