Multi-chip MMW Transceiver Interface for Signal Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing millimeter-wave (MMW) communication technologies face limitations due to high atmospheric attenuation, bandwidth constraints, and the need for noise-sensitive local oscillator (LO) signal generation, which complicates the implementation of millimeter-wave front-end blocks and restricts their application to close proximity to antennas, limiting throughput and increasing die area.
Innovation Solution
A multi-chip MMW transceiver system that enables direct transmission and reception of modulated signals at the same carrier frequency, eliminating the need for LO generation and multiplication in front-end ICs, allowing for channel bonding and simplified control link and DC power transmission, while supporting flexible radio architectures like homodyne and direct conversion radio architectures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If millimeter-wave front-end blocks are placed in close proximity to antennas to reduce signal loss, then transmitter output power and receiver noise figure are improved, but die area increases and system flexibility is reduced
Solution Approach 1:
The system is divided into separate front-end blocks and antenna modules that can be independently optimized. The front-end blocks are placed close to antennas to improve signal quality, while the segmentation allows each component to have optimized die area without compromising overall system performance.
2Productivity
If intermediate frequency signals are transmitted to handle large fractional bandwidth, then bandwidth capability is improved, but severe bandwidth limitation occurs due to high losses in millimeter-wave interconnects
Solution Approach 1:
The patent replaces the mechanical/electrical intermediate frequency conversion system with a direct digital synthesis approach. Digital signals are processed and converted directly to millimeter-wave frequencies, eliminating the need for analog IF interconnects and avoiding the associated signal losses while maintaining full bandwidth capability.
3Device complexity
If direct conversion radio architecture is used to simplify the system, then device complexity is reduced, but noise-sensitive local oscillator signal generation and multiplication are still required in front-end chips
Solution Approach 1:
The patent introduces a digital intermediary layer between the baseband and RF stages. Digital signal processing performs the frequency conversion functions, acting as an intermediary that eliminates the need for noisy analog local oscillators and multiplication circuits in the front-end, while maintaining direct conversion architecture benefits.
Data Source
AI summary
Systems and methods are provided for millimeter-wave (MMW) communication, the system includes a transceiver chip to generate and to receive signals. An interface is used to communicate the signals between the transceiver chip and one or more active antenna modules. The signals include modulated MMW signals and control signals. The transceiver chip includes baseband circuitry, up and down conversion mixers, and RF front-end circuitry. An active antenna module receives a first modulated MMW signal from the interface for transmission via antennas and to receive a second modulated MMW signal from the antennas for transmission through the interface to the transceiver chip.