Massive MIMO Power Amplifier Split for Broadcast and Unicast
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Solution Overview
Problem
Conventional M-MIMO systems face challenges in efficiently communicating both broadcast and unicast signals simultaneously due to coverage gaps and uneven power outputs, as they use the same transmission drive circuitry for both, leading to suboptimal performance in maintaining signal-to-noise ratios and power distribution.
Innovation Solution
The use of separate power amplifier sets for transmitting broadcast and unicast signals, where one set is optimized for broadcast and another for unicast, allowing for optimized coverage and power management, with the ability to share antennas and reduce power consumption by powering down unused amplifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same transmission drive circuitry is used for both broadcast and unicast signals, then device complexity is reduced, but signal performance deteriorates due to coverage gaps and uneven power outputs
Solution Approach 1:
The patent divides the transmission drive circuitry into separate power amplifier sets: one dedicated to broadcast signals and another to unicast signals. This segmentation allows each amplifier set to be optimized for its specific signal type, eliminating coverage gaps and power distribution issues that occur when using shared circuitry.
Solution Approach 2:
The patent applies local quality by configuring different power amplifier sets with different characteristics suited to their specific functions. The broadcast amplifier set is optimized for wide coverage, while the unicast amplifier set is optimized for targeted signal delivery, allowing each component to have locally optimized properties.
2Reliability
If separate power amplifier sets are used for broadcast and unicast signals, then signal performance is improved, but device complexity increases
Solution Approach 1:
The patent implements universality by enabling the broadcast and unicast power amplifier sets to share common antennas. This multi-functionality allows the same antenna array to serve both signal types, reducing the overall device complexity despite having separate amplifier sets.
Solution Approach 2:
The patent merges the broadcast and unicast transmission paths at the antenna level, where both amplifier sets feed into the same antenna array. This combining approach reduces hardware duplication and simplifies the overall system architecture while maintaining separate amplification paths.
3Use of energy by stationary object
If separate power amplifier sets are used for broadcast and unicast signals, then power consumption is increased due to more amplifiers, but power management is improved by ability to power down unused amplifiers
Solution Approach 1:
The patent applies dynamics by implementing dynamic power management where the broadcast and unicast power amplifier sets can be independently powered on or off based on transmission requirements. This dynamic control allows the system to consume power only when needed for each signal type, improving overall power efficiency.
Solution Approach 2:
The patent enables periodic activation of power amplifier sets based on transmission schedules. When broadcast transmission is required, the broadcast amplifier set is activated; when unicast transmission is required, the unicast amplifier set is activated. This periodic action pattern reduces average power consumption compared to having all amplifiers continuously active.
Data Source
AI summary
A transmitter adapted for massive multiple-input multiple-output (M-MIMO) operation includes a first set of power amplifiers (PAs) that amplifies a first signal to produce an amplified first signal, and a second set of PAs that amplifies a second signal to produce an amplified second signal, wherein PAs in the first set of PAs are different from PAs in the second set of PAs. The transmitter includes an antenna array operatively coupled to the first set of PAs and the set of second PAs, the antenna array including a plurality of transmit antennas, wherein the antenna array transmits one or more of the amplified signals.