RF Front-End Time-Staggered Antenna Diversity Without Antennaplexers
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Solution Overview
Problem
Modern RF wireless communication systems face challenges in achieving higher data rates, improved reliability, and enhanced capacity while reducing hardware cost without compromising signal-to-noise ratio (SNR) and achievable gain, due to the duplication of hardware and components in existing RF front-end architectures.
Innovation Solution
A radio frequency front-end system with a time-staggered diversity mode that controls an antenna switch to connect different antennas in sequential time slots for transmitting or receiving, eliminating the need for antennaplexers and reducing hardware duplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmit/receive components and multiple antennaplexers are used to support MIMO operation modes, then the system can achieve higher data rates and improved reliability, but the hardware cost increases due to duplication of components
Solution Approach 1:
The patent merges multiple transmit/receive components into a single shared component that is time-multiplexed across multiple antennas. Instead of having separate components for each antenna, one component serves multiple antennas by switching between them in different time slots, thereby reducing hardware duplication and cost while maintaining MIMO functionality.
Solution Approach 2:
The patent introduces dynamic time-staggered operation where the single transmit/receive component dynamically switches between different antennas based on time slots. This dynamic allocation allows the system to achieve diversity and multiplexing gains without requiring static dedicated components for each antenna, thus reducing hardware complexity.
2Reliability
If multiple antennaplexers are used to enable concurrent transmission and reception on multiple antennas, then the system achieves better signal-to-noise ratio and gain, but the insertion loss increases due to additional switching components
Solution Approach 1:
The patent employs periodic time-slot allocation where the single transmit/receive component is activated in alternating time slots for different antennas. This periodic operation reduces the number of simultaneous switching operations required compared to concurrent multi-component operation, thereby reducing cumulative insertion loss while still achieving diversity gain through time-diversity combining.
3Productivity
If all antennas are activated simultaneously to operate in parallel for MIMO modes, then the system achieves higher capacity, but the power consumption increases due to multiple active components
Solution Approach 1:
The patent activates only one transmit/receive component at a time instead of all components simultaneously. By using time-staggered activation where each antenna gets dedicated time slots with a single active component, the system achieves the necessary capacity through time-division multiplexing while consuming significantly less power than having all components active concurrently.
Data Source
AI summary
A radio frequency front end is configurable in a time-staggered diversity receive mode to control an antenna switch to connect a different one of a plurality of antennas to a receive path in each of a series of sequential time slots that do not overlap in time, such that the transmit/receive component redundantly receives the same data in each of the series of sequential time slots using a different one of the plurality of antennas.