Single-Carrier Packet Extensions Overlapping OFDM Cyclic Prefix
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Devices with power consumption restrictions face challenges in operating in OFDM communication systems due to high power consumption associated with OFDM transmission, leading to potential data loss during cyclic prefix removal.
Innovation Solution
A method of generating a single-carrier packet with equal-duration packet sections, prepending a first extension portion that overlaps with the OFDM signal cyclic prefix, allowing partial overlap or equal duration, and optionally appending a second extension portion to minimize data loss during cyclic prefix removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If single-carrier packets are transmitted without extension portions, then power consumption is reduced and transmission simplicity is improved, but data loss occurs during cyclic prefix removal
Solution Approach 1:
The patent applies preliminary action by prepending an extension portion to the single-carrier packet before transmission. This extension portion is specifically designed to overlap with the cyclic prefix that will be removed at the receiver, ensuring that any data loss during cyclic prefix removal does not affect the actual payload data. The extension portion acts as a protective buffer that is discarded along with the cyclic prefix, preserving the integrity of the main data portion.
2Loss of information
If the first extension portion completely covers the cyclic prefix duration, then data loss during cyclic prefix removal is minimized, but transmission time and packet length increase
Solution Approach 1:
The patent applies partial action by making the extension portion's duration equal to or greater than the cyclic prefix duration. This ensures sufficient coverage to prevent data loss during cyclic prefix removal, while avoiding excessive extension that would unnecessarily increase transmission time. The extension portion is precisely calibrated to match the cyclic prefix requirements.
3Device complexity
If packet sections have equal duration, then transmission structure is simplified and synchronization is improved, but flexibility in adapting to variable cyclic prefix lengths is reduced
Solution Approach 1:
The patent applies dynamics by making the extension portion's duration variable rather than fixed. The extension portion can be adjusted to match different cyclic prefix lengths dynamically, allowing the system to adapt to varying channel conditions and cyclic prefix requirements while maintaining the overall simplicity of equal-duration packet sections. This dynamic adjustment enables flexibility without compromising the regular packet structure.
Data Source
AI summary
A method is disclosed of generating a single-carrier packet using packet sections with equal duration for transmission to a receiver configured to receive an OFDM signal. The method includes establishing a data portion (DATA) of the single-carrier packet, and prepending a first extension portion (EXT1) to the data portion, wherein a time interval for transmission of the first extension portion overlaps, at least partially, with a time interval for OFDM signal cyclic prefix. A method is also disclosed of processing a received signal by a receiver configured to receive an OFDM signal. The method includes applying FFT to the received signal after discarding a part of the received signal that corresponds to a length of an OFDM signal cyclic prefix, and processing a baseband representation of the received signal as a single-carrier packet. Corresponding computer program product, apparatuses, devices, packet format, and signal are also disclosed.