Multi-Sector Signal Processing via Composite Channel Matrix
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Solution Overview
Problem
Existing wireless communication systems in multi-sectored base stations face challenges in dynamically utilizing all information from multiple sectors, leading to reduced throughput due to interference and computational complexity, especially when detecting target signals across sectors.
Innovation Solution
A method and system that dynamically process signals by combining channel matrices and received signal vectors from multiple sectors to generate a larger channel matrix and vector, allowing for interference cancellation and efficient detection of target signals, using techniques such as mean square error, zero forcing, or maximum likelihood detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If very narrow beams are created to reduce interference from multiple paths, then interference reduction is achieved, but received signal power is reduced and throughput is affected
Solution Approach 1:
The patent combines channel matrices and received signal vectors from multiple sectors to create a larger composite channel matrix. This merging allows the system to process signals from all sectors simultaneously, capturing both desired signals and interfering signals, then apply interference cancellation techniques to separate them, thereby maintaining signal power while reducing interference.
Solution Approach 2:
The patent converts the harmful interfering signals received from multiple sectors into useful information by incorporating them into the larger channel matrix. Through interference cancellation algorithms, the system identifies and removes the harmful interference components while preserving the desired signals, thus transforming the harmful multi-path effects into beneficial signal enhancement.
2Device complexity
If signals from multiple sectors are processed separately with demodulation and interference cancellation, then computational load is reduced, but channel capacity and throughput are limited
Solution Approach 1:
The patent merges channel matrices from multiple sectors into a single larger composite channel matrix, allowing simultaneous processing of all sector signals. This unified approach increases channel capacity by utilizing all available spatial information while managing computational complexity through efficient matrix operations and interference cancellation algorithms.
3Productivity
If a larger channel matrix is generated by combining multiple sectors, then interference cancellation is improved and channel capacity increases, but computational complexity increases
Solution Approach 1:
The patent dynamically adjusts the processing approach by first determining which sectors contain the target signal, then selectively combining only those sector matrices. This dynamic adaptation optimizes the size of the composite channel matrix, achieving improved interference cancellation and channel capacity while minimizing unnecessary computational complexity from processing all sectors uniformly.
4Object-affected harmful factors
If narrow beams are directed to target mobile units, then interference is reduced, but part of transmitted signal is ignored and received signal power is reduced
Solution Approach 1:
The patent creates a universal processing framework that handles signals from all sectors simultaneously through a composite channel matrix. This multi-functional approach captures all transmitted signals regardless of their direction or path, then applies interference cancellation to separate desired signals from interference, thereby maintaining received signal power while reducing interference.
Data Source
AI summary
Disclosed is a signal processing system in a base station that receives and processes single carrier or multiple carrier signals from transmitting units in a sectored coverage area with at least one transmit antenna and at least one receive antenna, the signal power gain between transmit and receive antennas within each sector being represented as a channel matrix with path gains. The system comprises: a detection unit that determines if signals from a given target transmitting unit is available in the signal received in a sector, and generates a detect signal for a combination unit; a decision unit that selects size of interference cancellation matrix; and an interference cancellation unit. When the signal from detection unit indicates that signal from a target transmitting unit is in the signal associated with at least two sectors, the decision unit joins channel matrices associated with the sectors to generate a large channel matrix, and using the resulting large channel matrix, the interference cancellation unit eliminates interference or generates originally transmitted signal. When the signal from detection unit indicates that signal from a target transmitting unit is in the signal of only one sector, the interference cancellation unit eliminates interference from the received signal, using the channel matrix associated with the one sector.