Uplink Waveform Identification via Reference Signal Embedding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless communication systems typically employ a single type of waveform for uplink transmission, limiting flexibility and adaptability in wireless communication environments, which can lead to suboptimal performance under varying conditions.
Innovation Solution
The system allows access terminals to select and indicate the type of waveform used for uplink transmission, such as SC-FDMA or OFDMA, by generating a reference signal based on the chosen waveform, enabling the base station to detect and adapt to the employed waveform type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single type of waveform is used for uplink transmission, then the system complexity is reduced and base station processing is simplified, but the adaptability and flexibility of the system deteriorates
Solution Approach 1:
The access terminal performs preliminary action by embedding waveform indication information directly into the reference signal before transmission. The base station then detects this pre-embedded information to identify the waveform type, eliminating the need for separate signaling channels and reducing overall system complexity while enabling waveform adaptability.
Solution Approach 2:
The reference signal serves as an intermediary carrier that indirectly conveys waveform type information. Instead of directly transmitting waveform indication through separate control signals, the patent uses the reference signal as a mediator to embed and transmit waveform information, achieving adaptability without proportionally increasing system complexity.
2Measurement precision
If waveform type information is explicitly signaled, then the base station can accurately detect the waveform type, but the overhead and transmission time increase
Solution Approach 1:
The patent merges waveform indication information with the reference signal transmission. Instead of sending waveform information separately as explicit signaling, the access terminal combines the waveform type indication with the reference signal itself, allowing the base station to detect waveform type simultaneously with reference signal reception, thereby reducing transmission time while maintaining detection accuracy.
Solution Approach 2:
The reference signal is given multi-functionality: it serves both as a signal for channel estimation and as a carrier for waveform type indication. This universal use of the reference signal eliminates the need for separate dedicated signaling for waveform indication, reducing overhead and transmission time while ensuring accurate waveform detection.
3Adaptability or versatility
If multiple waveform types are supported, then the system flexibility and performance adaptability improve, but the base station processing complexity increases
Solution Approach 1:
The access terminal performs self-service by autonomously selecting the optimal waveform type based on local transmission conditions and embedding this selection information directly into the reference signal. The base station simply detects the embedded information without requiring complex negotiation or configuration procedures, thereby achieving waveform flexibility while limiting base station processing complexity to primarily detection and decoding functions.
Data Source
AI summary
Systems and methodologies are described that facilitate indicating a type of waveform utilized for uplink transmission in a wireless communication environment. An access terminal can select a type of waveform from a set of possible waveform types. Moreover, a reference signal can be generated based upon the selected type of waveform. For instance, a sequence employed to yield the reference signal can be generated and/or chosen as a function of the selected type of waveform. According to another illustration, a tone location and/or a symbol location of the reference signal can be based upon the selected type of waveform. Further, the reference signal can be sent as part of the uplink transmission to the base station from the access terminal. The base station can detect the selected type of waveform utilized by the access terminal for the uplink transmission based upon parameter(s) recognized from the reference signal.