Channelized Baseband Transport for Flexible DAS Signal Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing telecommunications systems, particularly distributed antenna systems (DAS), face challenges in efficiently transporting digital baseband signals while minimizing bandwidth requirements and reducing interference, noise, and optimizing channel allocation.
Innovation Solution
A method for channelized digital baseband signal transport in DAS, involving digital down-conversion, channelization, and packet scheduling, which allows for efficient transport of baseband modulation information over synchronous or asynchronous digital links, enabling flexible channel assignment and interference suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital baseband signals are transported in traditional telecommunications systems, then call information can be transmitted, but bandwidth requirements are excessive and inefficient
Solution Approach 1:
The patent applies segmentation by dividing the digital baseband signal into multiple channels using channel filters. Each channel carries specific call information, allowing selective transport of only necessary signal components rather than transporting the entire baseband signal, thereby reducing bandwidth requirements while maintaining transport efficiency.
2Reliability
If traditional signal transport methods are used in DAS, then signals can be transmitted, but noise and interference increase
Solution Approach 1:
The patent extracts specific channel information from the digital baseband signal using channel filters and digital down-converters. By extracting only the required channel components for transport, the system eliminates unnecessary signal components that would contribute to noise and interference, thereby improving signal quality while reducing harmful factors.
3Adaptability or versatility
If channelized digital baseband signals are processed without packet scheduling, then signal transport is possible, but channel allocation is inefficient
Solution Approach 1:
The patent implements preliminary action by packetizing channelized digital baseband signals before transport and using packet scheduling to organize them for efficient transmission. This preliminary organization of signals into packets with proper scheduling allows flexible channel allocation and adaptive resource management, achieving versatility while managing complexity through structured preprocessing.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Communication methods, in a distributed antenna system that includes a head end unit for communicating channelized digital baseband signals with remotely located units, are provided. The channelized digital baseband signals include call information for wireless communication. The head end unit includes a channelizer section and a transport section. The channelizer section can extract, per channel, the channelized digital baseband signals using channel filters and digital down-converters. The transport section can format the channelized digital baseband signals for transport together using a transport schedule unit for packetizing and packet scheduling the channelized digital baseband signals. A signal processing subsystem can control a gain of uplink digital baseband signals, independently, that are received from the remotely located units prior to summing the uplink digital baseband signals.