Uplink MIMO Sigma-Delta Transmitter for Smaller Power Amplifiers
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Solution Overview
Problem
Traditional MIMO techniques in 5G-NR mobile communication devices require bulky power amplifiers for each transceiver chain, leading to increased footprint, power consumption, and costs, which compromises performance and user experience.
Innovation Solution
The implementation of a sigma-delta circuit that creates summed and difference signals from original signals, which are then amplified and reconstructed to match the original signals at a desired amplified level, allowing for the use of smaller power amplifiers and reducing the overall size, power consumption, and cost of the uplink MIMO transmitter apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional MIMO techniques use a separate power amplifier for each transceiver chain, then the required output power level is achieved, but the footprint, power consumption, and costs increase
Solution Approach 1:
The patent combines multiple transceiver chains into a single power amplifier by summing their output signals. The power amplifier amplifies the combined signal, and the amplified signals are then separated and distributed to respective antennas. This merging approach eliminates the need for multiple separate power amplifiers, reducing footprint while maintaining required output power levels for each transceiver chain.
Solution Approach 2:
The patent segments the signal processing into distinct stages: signal summation, power amplification, and signal separation. By separating the amplification function from the individual transceiver chains and placing it at the combined signal level, the system achieves efficient power utilization while reducing the number of power amplifiers needed.
2Power
If traditional MIMO techniques use a separate power amplifier for each transceiver chain, then the required output power level is achieved, but power consumption increases
Solution Approach 1:
By merging multiple transceiver chain signals into a single combined signal before amplification, the system amplifies once rather than multiple times. This single amplification stage consumes less power compared to having separate power amplifiers for each chain, while still delivering the required output power level to all antennas through subsequent signal separation.
3Power
If traditional MIMO techniques use a separate power amplifier for each transceiver chain, then the required output power level is achieved, but costs increase
Solution Approach 1:
The patent reduces costs by merging multiple transceiver chains into a single power amplifier architecture. This eliminates the need to manufacture and procure multiple separate power amplifiers, reducing component costs, assembly complexity, and overall system manufacturing costs while maintaining the required output power capability.
4Area of stationary object
If the footprint of power amplifiers is reduced, then a more compact transmitter apparatus is achieved, but the ability to handle required power levels may be compromised
Solution Approach 1:
The patent resolves this contradiction by combining multiple low-power amplifier outputs into a single high-power amplifier. The single power amplifier handles the combined signal at the required power level, eliminating the need for multiple bulky high-power amplifiers. The signal separation stage then distributes the amplified signals to individual antennas, maintaining the required power handling capability in a compact form factor.
Data Source
AI summary
An uplink multiple input-multiple output (MIMO) transmitter apparatus includes a transmitter chain that includes a sigma-delta circuit that creates a summed (sigma) signal and a difference (delta) signal from two original signals to be transmitted. These new sigma and delta signals are amplified by power amplifiers to a desired output level before having two signals reconstructed from the amplified sigma and amplified delta signals by a second circuit. These reconstructed signals match the two original signals in content but are at a desired amplified level relative to the two original signals. The reconstructed signals are then transmitted through respective antennas as uplink signals. By employing this uplink MIMO transmitter apparatus, it is possible to use smaller power amplifiers, which may reduce footprint, power consumption, and costs of the uplink MIMO transmitter apparatus.