Digital Fronthaul Microwave Transmission with Pilot Interleaving
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Solution Overview
Problem
In distributed base stations, the quality of radio signal information transmitted via microwave channels is degraded due to multipath, phase noise, frequency offset, and I/Q imbalance, making it difficult to compensate using channel parameters from common information, thereby degrading system performance.
Innovation Solution
A digital fronthaul data transmission method where a microwave air interface frame is generated in a time division multiplexing manner, with common information and radio signal information encapsulated and a pilot included in a microwave overhead, allowing for channel damage compensation using estimated microwave channel parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency division multiplexing is used to transmit common information and radio signal information on separate microwave channels, then both types of information can be transmitted simultaneously, but channel damage compensation becomes difficult because different microwave channels experience different damage
Solution Approach 1:
The patent merges common information and radio signal information into a single microwave carrier for transmission. By combining these previously separate channels into one unified transmission medium, the system ensures that both types of information experience identical channel conditions, enabling effective damage compensation using channel parameters derived from common information to restore radio signal information quality.
Solution Approach 2:
The patent makes a single microwave carrier serve multiple functions by simultaneously carrying both common information and radio signal information. This multi-functional approach allows the system to use the same transmission channel for different types of data, ensuring uniform channel characteristics and enabling cross-information compensation strategies.
2Reliability
If separate microwave channels are used for common information and radio signal information, then channel damage can be independently managed, but hardware complexity and costs increase
Solution Approach 1:
The patent reduces hardware complexity by merging separate transmission channels into a single microwave carrier. This consolidation eliminates the need for multiple independent channel management systems, reducing hardware requirements while maintaining the ability to manage different information types through software-based multiplexing and demultiplexing operations.
Data Source
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AI summary
The present invention discloses a digital fronthaul data transmission method, device, and system, which relate to the communications field and improve system performance of a distributed base station. A specific solution is: a first microwave device receives digital fronthaul data; obtains common information and radio signal information from the digital fronthaul data; performs digital QAM on the common information to obtain I/Q data of the common information; generates a microwave air interface frame in a time division multiplexing manner based on the radio signal information and the I/Q data of the common information, where the radio signal information and the I/Q data of the common information are encapsulated in a payload area of the microwave air interface frame, and a pilot in a microwave overhead and the payload area are arranged at a preset interval in an interleaved manner; and sends the microwave air interface frame. The present invention is applied to a digital fronthaul data transmission process.