Multicarrier Receiver Bandwidth Reconfiguration for Non-Adjacent Carrier Support
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Solution Overview
Problem
Conventional multicarrier communication systems in wireless communication, such as HSDPA and LTE, face challenges in receiving non-adjacent carriers due to non-contiguous spectrum allocations, which are problematic for contiguous-bandwidth low-complexity receivers, leading to issues like dynamic range problems and interference.
Innovation Solution
A method and apparatus that configure a receiver's bandwidth to switch between adjacent and non-adjacent carrier modes based on an imbalance metric, calculated from received signal strength indications, to optimize signal reception and mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a contiguous-bandwidth low-complexity receiver is used to receive non-adjacent carriers, then device complexity is reduced, but signal quality deteriorates due to dynamic range problems and interference
Solution Approach 1:
The receiver bandwidth is made dynamically reconfigurable between contiguous and non-contiguous modes. The system monitors signal conditions and automatically switches between adjacent carrier mode (contiguous bandwidth) and non-adjacent carrier mode (non-contiguous bandwidth), allowing the receiver to adapt to different spectrum allocation scenarios while maintaining signal quality and managing complexity.
2Ease of operation
If adjacent carriers are received on the same band, then reception is simplified for contiguous-bandwidth receivers, but adaptability to modern spectrum allocations is reduced
Solution Approach 1:
The receiver is designed to dynamically switch between adjacent carrier mode and non-adjacent carrier mode based on network configuration and spectrum allocation. This allows the system to maintain simplicity when carriers are adjacent while adapting to modern non-contiguous spectrum allocations, thereby resolving the contradiction between ease of operation and adaptability.
Solution Approach 2:
The receiver is designed to support multiple carrier configurations (both adjacent and non-adjacent carriers on the same band) using a single contiguous-bandwidth hardware architecture. By making the receiver universal and capable of handling different spectrum allocation patterns through software control and bandwidth reconfiguration, the system achieves both simplicity and adaptability.
Data Source
AI summary
Embodiments of the invention are concerned with multicarrier communication support, such as non-adjacent multicarrier support for a contiguous-bandwidth receiver. One embodiment includes receiving one or more carriers in a configurable contiguous bandwidth, calculating an imbalance metric representing a receiving imbalance over a set of carriers, said imbalance metric representing a difference between a first value based on received signal strength indication on each of one or more carriers and a second value based on received signal strength indication on each of one or more carriers, verifying, based on the calculated imbalance metric, whether a threshold condition relating to a current mode of an adjacent carrier mode and non-adjacent carrier mode is satisfied, and reporting an event for triggering reconfiguration of said configurable contiguous bandwidth to switch the current mode between said adjacent and non-adjacent carrier modes, if the threshold condition is satisfied.