Multiple-antenna space multiplexing system using enhancement signal detection and method thereof
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Solution Overview
Problem
Existing multiple-antenna communication systems face challenges in improving data transmission rates due to the complexity of nonlinear detection methods, which increase operational complexity while offering better performance compared to linear detection methods.
Innovation Solution
A BLAST system employing enhancement signal detection that transforms the channel matrix and received signal vector to reduce noise and improve bit error rate (BER) performance, maintaining lower complexity compared to sequential interference cancellation nonlinear detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nonlinear detection method (ZF-SIC or MMSE-SIC) is used, then system performance is improved, but device complexity increases significantly
Solution Approach 1:
The patent segments the detection process into two distinct stages: first performing linear detection to obtain initial signal estimates, then applying interference cancellation only to residual interference. This segmentation avoids the full complexity of traditional nonlinear detection while retaining performance benefits by selectively removing interference after linear detection.
Solution Approach 2:
The patent applies partial interference cancellation by performing interference removal based on linear detection results rather than complete iterative cancellation. This partial action achieves sufficient performance improvement without incurring the full computational burden of traditional nonlinear detection algorithms.
2Device complexity
If linear detection method is used, then device complexity is reduced, but system performance deteriorates
Solution Approach 1:
The patent introduces an intermediary step between linear detection and final decision: interference cancellation based on the linear detection results. This intermediary process removes residual interference that degrades performance while maintaining the low complexity advantage of linear detection by avoiding full iterative nonlinear processing.
Solution Approach 2:
The patent substitutes the complex mechanical iterative process of traditional nonlinear detection with a simplified interference cancellation mechanism that operates on linear detection outputs. This substitution replaces the heavy computational machinery of iterative algorithms with a more efficient single-stage or reduced-stage processing approach.
Data Source
AI summary
The multiple-antenna space multiplexing system using enhancement signal detection comprising: a code modulation module for coding and modulating bit information; a signal transmission module for transmitting the modulated signals; a signal reception module for receiving the signals; a signal form transform module for transforming form of a channel matrix H and the received signal vector r; a signal detection module for detecting the received signals; a signal reconstruction module for reconstructing the detection results of in the signal detection module, and obtaining a detected signal; a demodulation decoding module for demodulating and decoding the output of the signal reconstruction module, and outputting bit information. Compared with the conventional detection methods, the system performance is improved in considering the realization complexity.