Single Transmitter Transmission Diversity Using Phase Adjustment

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Solution Overview

Problem

In wireless communication systems, existing transmission diversity methods require multiple transmitters, leading to complex hardware configurations, increased power consumption, and high production costs, making it difficult to implement transmission diversity in applications with limited power resources.

Innovation Solution

A method and apparatus using a single transmitter with a phase adjustment coupler and Single Resonator Multiple Mode (SRMM) antennas to transmit data symbols and their complex conjugates through two antennas in alternating time slots, allowing for transmission diversity with reduced power consumption and simpler hardware.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple transmitters are used for transmission diversity, then transmission reliability is improved, but device complexity and power consumption increase

Engineering Contradiction:

Improvetransmission reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple transmitter functions into a single transmitter by using time-division multiplexing. The single transmitter alternates between transmitting the original signal and its complex conjugate through different antennas in different time slots, achieving transmission diversity without requiring multiple simultaneous transmitters. This merging approach reduces device complexity while maintaining transmission reliability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements periodic action by alternating the transmission of original signals and complex conjugate signals through different antennas in successive time slots. This periodic switching enables the system to achieve diversity gain over time without requiring multiple transmitters to operate simultaneously, thus reducing hardware complexity while improving transmission reliability.

Inventive Principle:

Principle #19Periodic action

2Reliability

If multiple transmitters are used for transmission diversity, then transmission reliability is improved, but power consumption increases

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent merges multiple transmitter operations into a single transmitter that operates in time-division mode. By consolidating the transmission functions into one transmitter that alternates between different signal types and antenna configurations, the system achieves transmission diversity while significantly reducing power consumption compared to having multiple transmitters operating simultaneously.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The periodic alternation between transmitting original signals and complex conjugate signals through different antenna pairs allows a single transmitter to achieve diversity gain over time. This time-division approach ensures the transmitter is active but not continuously at maximum power, reducing overall power consumption while maintaining reliability.

Inventive Principle:

Principle #19Periodic action

3Reliability

If multiple transmitters are used for transmission diversity, then transmission reliability is improved, but production cost increases

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the functionality of multiple transmitters into a single transmitter unit. By using one transmitter to perform the roles of multiple transmitters through time-division multiplexing and signal processing, the system achieves transmission diversity while reducing the number of components that need to be manufactured and assembled, thereby lowering production costs.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single transmitter is designed with multi-functionality to perform both original signal transmission and complex conjugate signal transmission. This universal design allows one transmitter unit to replace multiple specialized transmitters, simplifying the manufacturing process and reducing production costs while maintaining the reliability benefits of transmission diversity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11159226B2Method and apparatus for implementing transmission diversity using single transmitter

Publication Date: 2021.10.26 KOOKMIN UNIV IND ACAD COOP FOUND

AI summary

A method and an apparatus for implementing transmission diversity using a single transmitter in a wireless communication system are provided. The method of operating a transmitter for transmission diversity in a wireless communication system includes generating a first data symbol by receiving a baseband signal from a data source, generating a second data symbol having an equal phase to the first data symbol, generating a first complex conjugate symbol by performing a complex conjugate operation for the first data symbol, generating a second complex conjugate symbol having a phase difference of 180 degrees from the first complex conjugate symbol, transmitting the first data symbol through a first transmission antenna and transmitting the second data symbol through a second transmission antenna in a first time slot, and transmitting the first complex conjugate symbol through the first transmission antenna and transmitting the second complex conjugate symbol through the second transmission antenna in a second time slot.