Core Concepts
Proposing a single-carrier transmission with delay-Doppler domain equalization (SC-DDE) to address high PAPR issues in wireless communications.
Abstract
The content discusses the SC-DDE system proposal for compensating doubly-selective fading channels. It introduces the concept of delay-Doppler domain equalization, highlighting the need for embedded pilot-aided channel estimation. The system's complexity is compared to other modulation schemes like OTFS and SC-FDE, emphasizing its advantages and challenges.
Structure:
- Introduction to Doubly-Selective Channels
- Frequency-selective fading challenges in wireless communication.
- Single-Carrier Transmission Overview
- Description of SC block transmission with CP insertion.
- Channel Model Explanation
- Consideration of maximum delay and Doppler shift values.
- Received Signal Representation
- Continuous-time received signal expression and SNR calculation.
- Single-Carrier Delay-Doppler Domain Equalization (SC-DDE)
- System model description and computational complexity analysis.
- Channel Estimation Design for SC-DDE
- Derivation of DD domain input-output relation for SC transmission.
- Embedded Pilot-Aided Channel Estimation
- Introduction of pilot symbols in the DD domain for channel estimation.
Stats
Since equalization is performed in the DD domain, the SC-DDE receiver should acquire the channel delay-Doppler response.
Through computer simulation, distribution of PAPR and BER performance are compared with conventional OTFS and SC-FDE systems.
Quotes
"The proposed SC-DDE significantly outperforms SC-FDE in terms of BER at the expense of additional computational complexity."