MIMO Bandwidth Module Interleaving for 160 MHz Wireless Throughput
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Solution Overview
Problem
The increasing demand for higher bandwidth in wireless communication systems, particularly with the 802.11ac standard, poses challenges in designing next-generation network architecture that balances higher bandwidth support with backwards compatibility and reduced time to market, while traditional solutions struggle with scaling analog and digital components effectively.
Innovation Solution
The implementation of a wireless transmitter with multiple bandwidth modules that process data across different frequency bands, utilizing MIMO stream parsing, interleaving, and inverse Fast Fourier Transform (IFFT) units to generate and transmit MIMO streams, allowing for efficient reuse of 80 MHz bandwidth modules to cover 160 MHz bandwidths, thereby improving signal dispersion and error correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional single data path design is used, then device complexity is reduced, but bandwidth support is limited and cannot meet higher throughput requirements
Solution Approach 1:
The patent divides the data path into multiple parallel paths (first data path and second data path), each capable of independent signal processing. This segmentation allows the system to support wider bandwidths (e.g., 160 MHz) by combining multiple narrower bandwidth paths (e.g., two 80 MHz paths), thereby increasing productivity without requiring a complete redesign of the entire data path.
Solution Approach 2:
The patent implements a hierarchical structure where multiple 80 MHz bandwidth modules are nested within a 160 MHz bandwidth framework. Each bandwidth module contains complete signal processing functionality (encoding, interleaving, IFFT), and these modules are combined to form the larger bandwidth system, enabling scalable bandwidth support while reusing proven design components.
2Productivity
If new data path design is implemented for higher bandwidth, then bandwidth support is improved, but time to market increases due to redesign and verification requirements
Solution Approach 1:
The patent reuses previously designed and verified 80 MHz bandwidth modules in the new 160 MHz configuration. By preparing and validating the base bandwidth module design in advance, the system can be scaled to higher bandwidths without requiring complete redesign and re-verification, significantly reducing time to market while maintaining reliability.
Solution Approach 2:
The bandwidth module is designed with universal functionality that can operate independently at 80 MHz or be combined with other identical modules to achieve 160 MHz bandwidth. This multi-functionality allows the same hardware design to serve multiple bandwidth requirements, eliminating the need for separate design cycles for different bandwidth configurations.
3Speed
If bandwidth modules operate at higher clock speeds, then data transfer rates are improved, but signal integrity and error rates worsen due to timing and noise issues
Solution Approach 1:
The patent segments the high-speed data path into multiple parallel lower-speed paths (e.g., two 80 MHz paths instead of one 160 MHz path). Each segment operates at manageable clock speeds with maintained signal integrity, while the combined output achieves the desired high data transfer rate. This segmentation prevents timing and noise issues associated with operating a single path at excessively high speeds.
Solution Approach 2:
The patent combines multiple parallel data paths after individual processing stages (encoding, interleaving, IFFT) to achieve high aggregate data transfer rates. By merging the outputs of multiple reliable lower-speed paths, the system attains high overall speed while each individual path maintains signal integrity through operation at lower, more stable clock speeds.
Data Source
AI summary
A wireless transmitter can include a plurality of bandwidth modules, each bandwidth module processing data based on a predetermined frequency band. In one embodiment, such a wireless transmitter can include encoding components for receiving transmit data and generating encoded data. A multiple-input multiple-output (MIMO) stream parser can receive the encoded data and generate a plurality of MIMO streams. A first module parser coupled to a first MIMO stream can generate a first plurality of partial MIMO streams. A first bandwidth module can include a first interleaver that interleaves bits of the first partial MIMO stream and generates first interleaved data. A second bandwidth module can include a second interleaver that interleaves bits of the second partial MIMO stream and generates second interleaved data. A first inverse fast Fourier transform (IFFT) unit can combine and process the first and second interleaved data and generate a first transmission MIMO stream.