Transceiver Group Using QAM Carrier Multiplexing
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Solution Overview
Problem
High-speed communication bus systems face challenges in increasing transmission speed while minimizing power consumption and transition time, particularly with wide parallel bus transmission where power summation is high and limited by transition time.
Innovation Solution
The use of a transceiver system employing Quadrature Amplitude Modulation (QAM) with multiple carriers of distinct frequencies to transmit data streams over differential transmission lines, reducing the need for physical pins and interconnects by allowing wider bandwidth and higher data throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wide parallel bus transmission is used to increase data throughput, then transmission capacity is improved, but power consumption increases due to power summation of each signal unit
Solution Approach 1:
The patent transitions from parallel bus transmission to serial transmission using multiple carriers with different frequencies. Instead of transmitting multiple signals simultaneously over parallel lines, the system modulates multiple data streams onto separate frequency carriers and transmits them sequentially over a single differential pair, thereby achieving high throughput without proportional power increase.
Solution Approach 2:
The patent changes the transmission parameter from spatial parallelism to frequency diversity. By assigning different frequency carriers to different data streams and using QAM modulation, the system achieves multiplexing capability that allows multiple signals to share a single transmission medium, reducing the number of physical connections and associated power consumption.
2Speed
If transition time is reduced to increase transmission speed, then transmission speed is improved, but power consumption increases
Solution Approach 1:
The patent employs periodic carrier waves with distinct frequencies to transmit data streams. Each carrier operates at its own frequency and follows periodic cycles, allowing data to be transmitted in a structured, time-multiplexed manner. This periodic action enables high-speed transmission without requiring excessively short transition times for each signal unit.
3Productivity
If multiple signals are transmitted simultaneously to increase throughput, then data throughput is improved, but the number of I/O pins and interconnects increases
Solution Approach 1:
The patent makes a single differential transmission line perform multiple functions by using frequency-division multiplexing. The same physical medium carries multiple data streams simultaneously through the use of different frequency carriers, making the transmission line universal for multiple communication channels without requiring separate pins or interconnects for each channel.
Solution Approach 2:
The patent creates frequency-domain copies of the transmission medium. Instead of physically duplicating transmission lines, the system generates virtual copies through frequency modulation, where each carrier frequency represents a copied channel that can be independently addressed and controlled, achieving multi-channel capability without physical multiplication of interconnects.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances data throughput by enabling more signals to be transmitted simultaneously, reduces the number of I/O pins and interconnects, and maintains lower transmission frequency bandwidth within each carrier frequency, thereby improving overall communication efficiency.
Implementation Method 1
The use of a transceiver system employing Quadrature Amplitude Modulation (QAM) with multiple carriers of distinct frequencies to transmit data streams over differential transmission lines
Implementation Method 2
transmit data streams over differential transmission lines
Data Source
AI summary
A transceiver group includes a plurality of transceivers; wherein the transceiver group performs transmission and receiving through a wire, and each of the transceivers includes a transmitter and a receiver, and the transmitter includes: a carrier generator arranged to generate a plurality of carriers having different frequencies for a plurality of data streams to be transmitted; a modulator, coupled to the data streams to be transmitted and the carrier generator, to generate a plurality of modulated data streams carried on the plurality of carriers; and a summer arranged to merge the plurality of modulated data streams to an output signal to the wire; and the receiver includes: a carrier generator arranged to generate a plurality of carriers having different frequencies for an input signal received from the wire; and a demodulator, coupled to the input signal and the carrier generator, to generate a plurality of demodulated data streams.