Reverse Link Mobile Transmit Diversity MIMO Phase Adjustment
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Solution Overview
Problem
Current cellular network technologies face challenges in processing increasing voice and data traffic, particularly with single antenna systems, and there is a need for a method to adjust the relative phase, delay, and power in MIMO systems to improve data throughput.
Innovation Solution
A wireless communication system with an access terminal and access network that includes communication modules, a receiver, processor, transmitter, and channel estimator to adjust and modulate channel state information, enabling the adjustment of transmit gain and phase for improved data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single antenna systems are used, then device complexity is reduced, but data throughput and network capacity deteriorate
Solution Approach 1:
The patent segments the transmission function by using multiple antennas (first and second transmit antennas) to transmit different signal streams or the same signal through separate paths. This segmentation allows the system to achieve higher data throughput by utilizing spatial diversity while maintaining manageable complexity through modular antenna design
Solution Approach 2:
The patent transitions from a single-antenna (one-dimensional) system to a multi-antenna (multi-dimensional) system by introducing spatial dimension. Multiple antennas transmit signals through different spatial paths, creating additional degrees of freedom for data transmission, thereby increasing throughput without proportionally increasing system complexity
2Productivity
If MIMO techniques are employed with multiple transmitter/receiver pairs, then data throughput increases, but system complexity and difficulty of control increase
Solution Approach 1:
The patent implements feedback mechanisms where the receiver measures channel conditions and provides information back to the transmitter. This feedback enables dynamic adjustment of transmission parameters (phase, delay, power) for each antenna, allowing the system to adapt to changing channel conditions and optimize performance without requiring complex centralized control
Solution Approach 2:
The patent employs dynamic parameter adjustment where phase, delay, and power settings for each antenna are continuously optimized based on real-time channel conditions. This dynamic adaptation allows the MIMO system to maintain high throughput while managing complexity through flexible, condition-based control rather than fixed complex configurations
3Productivity
If relative phase, delay, and power are adjusted in MIMO systems, then link-budget and sector capacity improve, but control complexity increases
Solution Approach 1:
The patent systematically adjusts key transmission parameters (phase, delay, power) for each antenna to optimize system performance. By changing these parameters dynamically based on channel conditions, the system achieves improved link-budget and sector capacity while using standardized parameter adjustment techniques that manage control complexity
Data Source
AI summary
An access network is wirelessly coupled to an access terminal. The access network comprises a plurality of communication modules, a transmitter and a channel estimator. The plurality of communication modules coupled to the access terminal and configured to transmit a plurality of signals. The transmitter coupled to the access terminal and configured to send an index which indicates number of the plurality of signals. The channel estimator, configured to adjust and modulate a channel state information into the plurality of signals.