MIMO Relay Signal Relaying Interference Removal
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Solution Overview
Problem
In half duplex relay communication systems, the maximum transmission rate decreases linearly with the number of hops, and there is a need to address inter relay interference (IRI) that occurs when using two-way relay technology to enhance data transmission rates.
Innovation Solution
The implementation of a method and apparatus for high-speed signal relaying in MIMO based relay communication systems using space time block code (STBC) two-way relay technology, which involves receiving data signals by multiple relays, removing inter relay interference using MIMO signal detection, and transmitting data signals through selected relays during specific time slots to improve transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If half duplex relay is used to extend coverage, then coverage area is improved, but transmission rate linearly decreases as number of hops increases
Solution Approach 1:
The patent combines multiple relays to work simultaneously in a coordinated manner. By merging the capabilities of multiple relays and using them together in a multi-relay system, the transmission rate degradation problem is addressed while maintaining extended coverage area.
Solution Approach 2:
The patent introduces signal detection and processing mechanisms as intermediaries between the relays and the end devices. These intermediary processing steps enable the system to manage the complexity of multiple hops while maintaining transmission quality and rate.
2Productivity
If two-way relay technology is used to improve transmission rate, then transmission rate is improved, but inter relay interference (IRI) occurs between multiple relays
Solution Approach 1:
The patent extracts and removes the inter relay interference component from the received signal through signal detection and processing. By taking out the harmful IRI component separately, the system can recover the desired signal while eliminating the interference generated by multiple relays operating simultaneously.
Solution Approach 2:
The patent changes the signal parameters through detection and processing operations. By transforming the received signal parameters and separating the interference component, the system manages to improve transmission rate while controlling the harmful effects of inter relay interference.
3Area of stationary object
If multiple relays are used to extend coverage further, then coverage area is improved, but transmission rate continues to decrease
Solution Approach 1:
The patent merges multiple relays into a coordinated system where they work together rather than independently. This combining approach allows the system to extend coverage further while maintaining transmission rate by utilizing the collective capability of multiple relays in a unified manner.
Solution Approach 2:
The patent makes the relay system multi-functional by enabling relays to perform both signal forwarding and interference management functions. This universality allows the same relay infrastructure to simultaneously extend coverage and maintain transmission rate through coordinated operation.
Data Source
AI summary
An object of the present disclosure is to provide a method for high-speed signal relaying based on an MIMO based relay communication system and an apparatus thereof, which use a space time block code (STBC) based two-way relay technology in order to improve transmission rate reduction which occurs upon relaying a transmission signal by using a half duplex relay, and removes an inter relay interference which occurs between a plurality of relays used when using the two-way relay technology by using multiple input multiple output (MIMO) signal detection. In order to achieve the object, the method for high-speed signal relaying in the MIMO based relay communication system includes: receiving, by a plurality of relays, data signals transmitted from a sender by a reception unit during respective time slots; and removing, by a removal unit, an inter relay interference (IRI) component generated by using the plurality of relays.