Signal Modification via Diversity Parameter Adjustment
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Solution Overview
Problem
Existing wireless communication systems face interference issues due to multiple antenna elements transmitting signals along different paths, leading to destructive interference, which previous techniques have not adequately addressed.
Innovation Solution
A communication network that modifies signals based on diversity parameter adjustments, synchronized with frame timing, using feedback information to optimize transmit diversity control, thereby reducing interference by adjusting transmission power and phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antenna elements transmit signals simultaneously, then spectral efficiency is enhanced and more users can be served, but destructive interference occurs due to different propagation paths and phases
Solution Approach 1:
The patent implements a feedback mechanism where the receiving device measures signal quality metrics (such as SINR) and sends feedback information to the transmitting device. Based on this feedback, the transmitting device adjusts diversity parameters (like phase shifts or amplitude weights) of antenna elements to optimize signal transmission and minimize destructive interference, thereby maintaining high spectral efficiency.
Solution Approach 2:
The patent dynamically changes transmission parameters (phase, amplitude, frequency) of signals from different antenna elements based on channel conditions and feedback information. By adjusting these parameters in real-time, the system can transform destructive interference patterns into constructive ones, enabling more users to be served simultaneously on the same frequency band.
2Reliability
If diversity parameter adjustments are made without frame timing synchronization, then adaptive interference reduction is achieved, but activation of diversity control is not concurrent with transmit power changes
Solution Approach 1:
The patent applies transmit diversity control techniques in advance according to frame timing to determine the next diversity parameter adjustment before the actual transmission occurs. This preliminary action ensures that diversity parameter adjustments are synchronized with frame boundaries and concurrent with transmit power changes, eliminating timing misalignment and ensuring reliable interference reduction.
Data Source
AI summary
A signal is modified according to a current diversity parameter adjustment, and is transmitted from a modifying communication device to a feedback communication device. A feedback signal reflecting feedback information describing the signal as received by the feedback communication device is received. The feedback signal comprises frames, and a frame comprises slots, where a slot has a slot power value. The frame timing of the frames is established from the slot power values. The signal is modified according to a next diversity parameter adjustment in accordance with the frame timing.