MIMO Signal Processor Frequency to Spatial Diversity
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Solution Overview
Problem
Current MIMO communication systems face challenges in seamlessly transitioning between wireline and wireless signaling modes, particularly in maintaining efficient data transmission and capacity across different communication mediums and devices, due to limitations in frequency and spatial diversity.
Innovation Solution
The proposed solution involves a MIMO communication system that includes a signal processor capable of converting frequency diverse signals to spatially diverse signals, using a combination of codeword multiplexing, modulation mapping, OFDM processing, and converter devices to facilitate simultaneous transmission over multiple paths, while also incorporating a third end station to preprocess signals for wireless transmission, ensuring compatibility with various devices and mediums.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO systems transmit data simultaneously over multiple paths using multiple transmitting and receiving antennas, then data transmission capacity is increased, but system complexity increases
Solution Approach 1:
The patent segments the data stream into multiple independent codewords that can be transmitted simultaneously over different spatial paths. Each codeword is processed independently through modulation and antenna mapping, allowing parallel transmission that increases capacity while maintaining manageable processing complexity through modular operation.
Solution Approach 2:
The patent transitions from single-path frequency-division multiplexing to multi-path spatial multiplexing by introducing a new dimension of spatial diversity. Multiple antennas create independent transmission channels in the spatial domain, enabling simultaneous data streams that increase capacity beyond what single-path systems can achieve.
2Productivity
If frequency diverse signals are converted to spatially diverse signals using multiple antennas, then throughput is enhanced, but device complexity increases
Solution Approach 1:
The patent introduces signal processors as intermediary devices that perform codeword multiplexing, modulation mapping, and antenna element mapping. These intermediaries transform frequency-diverse input signals into spatially-diverse output signals, enabling throughput enhancement while concentrating complexity in dedicated processing units rather than distributed across the entire system.
Solution Approach 2:
The patent changes the fundamental parameter of signal diversity from frequency domain to spatial domain. By mapping different codewords to different spatial paths through multiple antennas, the system achieves diversity gain in the spatial dimension, enabling higher throughput through parallel spatial channels rather than frequency multiplexing.
3Adaptability or versatility
If seamless transition between wireline and wireless signaling modes is implemented, then adaptability is improved, but system complexity increases
Solution Approach 1:
The patent designs the MIMO system with universal signal processing capabilities that can operate in both wireline and wireless modes. The same signal processors, codeword multiplexing mechanisms, and antenna mapping structures serve dual purposes, allowing seamless mode transition without requiring separate dedicated systems for each communication type.
Data Source
AI summary
A multiple-input multiple-output (MIMO) capable system is contemplated. The communication system may include a signal processor configured to separate an input stream into multiple signal paths to facilitate simultaneous transport through a communication medium. The capability to simultaneously transmit multiples signal paths may be beneficial in order to maximize throughput and/or minimize expense.