Space-Frequency Transmission Diversity for Antenna Utilization
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Solution Overview
Problem
Current technologies, such as MIMO systems, do not effectively utilize multiple transmission antennas for all terminals, especially when transmitting preambles and broadcasting messages, leading to inefficiencies in data transmission and power usage.
Innovation Solution
The implementation of space-frequency transmission diversity, which groups data or signals into multiple groups and transmits them through different sub-carriers using different transmission antennas, allowing for efficient use of multiple antennas without requiring MIMO support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO system is used to transmit data through multiple paths using multiple transmission antennas, then transmission capacity is increased, but terminals that cannot support MIMO system cannot effectively use multiple transmission antennas
Solution Approach 1:
The patent segments the frequency spectrum into multiple sub-carrier groups and assigns different groups to different transmission antennas. This allows the system to provide multiple transmission paths for MIMO-capable terminals while maintaining compatibility with non-MIMO terminals by transmitting all sub-carriers across all antennas, ensuring universal accessibility.
Solution Approach 2:
The patent applies different transmission strategies to different frequency resources (sub-carriers) based on terminal capabilities. For MIMO-capable terminals, specific sub-carrier groups are assigned to specific antennas to enable spatial multiplexing, while for non-MIMO terminals, all sub-carriers are transmitted across all antennas to ensure compatibility.
2Reliability
If MIMO system is applied for transmitting preambles and broadcasting messages, then transmission diversity can be achieved, but it is difficult to apply MIMO system regardless of terminal support
Solution Approach 1:
The patent segments preambles into multiple preamble groups and assigns each group to different transmission antennas. This provides transmission diversity for all terminals regardless of MIMO capability, as non-MIMO terminals can still receive all preamble groups across different antennas while MIMO-capable terminals benefit from the diversity gain.
Solution Approach 2:
The patent creates a universal transmission scheme that works for both MIMO-capable and non-MIMO terminals. By transmitting multiple preamble groups across multiple antennas with a structure that all terminals can decode, the system achieves transmission diversity universally without requiring MIMO support.
3Loss of energy
If multiple transmission antennas are used without MIMO support, then transmission power can be reduced through diversity gain, but traditional diversity schemes do not effectively utilize multiple antennas for all signal types
Solution Approach 1:
The patent segments data into multiple sub-carrier groups and preambles into multiple preamble groups, assigning them to different transmission antennas. This effective segmentation and distribution enables the system to achieve diversity gain and reduce transmission power while fully utilizing all transmission antennas for both data and control signals.
Data Source
AI summary
The present invention relates to a transmission device and method using space-frequency transmission diversity in a communications system. The transmission device and method using space-frequency transmission diversity according to the present invention is characterized in that data or signals are grouped into 2 or more groups which are then transmitted through different transmission antennae by using different sub-carriers.