Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Method for Estimating Vector/Matrix Parameter of Communication System
Technology Category/Market
Category – Information & Communication Technology (ICT)
Applications -Base-stations, Software /Hardware implementations, Communication systems
Industry- Wireless Technology, ICT
Market -The global information technology market grew from $8179.48 billion in 2022 to $8852.41 billion in 2023 at a compound annual growth rate(CAGR) of 8.2%. The information technology market is expected to grow to $11995.97 billion in 2027 at a CAGR of 9.7%.
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Problem Statement
- In communication systems data points (pilot symbols) are known, and data symbols are estimated/ hypothesized symbols unknown to receivers ,which if incorrectly estimated leading to outlier effect while estimating the parameter vector.
- Decision directed approach involves decisions that are obtained at the receiver and are used in addition to pilots to improve the estimation of the parameter , but contains outliners and lead to error propagation
Technology
- The invention discloses a method for estimating a vector/matrix parameter of a communication system
- The said method mitigates error propagation by selecting reliable set of data symbols and utilizing those data symbols for estimating the vector/matrix parameter. (Fig. 1)
- The method includes computing a Log Likelihood Ratio (LLR) , which is the reliability criterion of each bit for each data symbol of the first set
- The data symbols of the first set are in a predetermined order based on the average LLR of each data symbol.
- The second set consists of a predetermined number of data symbols from the first set with highest average LLR
- In case of any hardware implementations, various networking devices or external I/O devices may be connected to the computing environment (Fig.2) in order to support the implementation through the networking unit and the I/O device unit
- The technique comprising of instructions and codes required for the implementation are stored in either the memory unit or the storage or both and later executed by the processing unit
Key Features/Value Proposition
Technical Perspective:
- Improved accuracy of the estimated vector/matrix parameter
- The selection of data symbols on the reliability criterion prevents error propagation due to outliner effect
Industrial Perspective:
- The said technique can be used as electronic device or computer program product implemented on base station / mobile unit
- Useful in generic wireless transmitter /receiver decision directed schemes to estimate parameters of wireless systems.
Questions about this Technology?
Contact for Licensing
Research Lab
Prof. Sheetal Kalyani
Department of Electrical Engineering
Intellectual Property
- IITM IDF Ref. 1357
- IN420632 (Granted)
Technology Readiness Level
TRL- 2
Technology Concept Formulated