Wideband Time Frequency Coding
| Autor: | Salman Salamatian, Kathleen Yang, Muriel Medard, Rafael G. L. D'Oliveira |
|---|---|
| Rok vydání: | 2023 |
| Předmět: |
Signal Processing (eess.SP)
FOS: Computer and information sciences Computer science Computer Networks and Communications Computer Science - Information Theory Aerospace Engineering Data_CODINGANDINFORMATIONTHEORY 02 engineering and technology Topology Upper and lower bounds 020210 optoelectronics & photonics FOS: Electrical engineering electronic engineering information engineering 0202 electrical engineering electronic engineering information engineering Wireless Fading Electrical Engineering and Systems Science - Signal Processing Wideband Electrical and Electronic Engineering Computer Science::Information Theory Frequency-shift keying business.industry Information Theory (cs.IT) 020206 networking & telecommunications Time–frequency analysis Duty cycle Pulse-position modulation Automotive Engineering business |
| Zdroj: | PIMRC |
| ISSN: | 1939-9359 0018-9545 |
| DOI: | 10.1109/tvt.2023.3262162 |
| Popis: | In the wideband regime, the performance of many of the popular modulation schemes such as code division multiple access and orthogonal frequency division multiplexing falls quickly without channel state information. Obtaining the amount of channel information required for these techniques to work is costly and difficult, which suggests the need for schemes which can perform well without channel state information. In this work, we present one such scheme, called wideband time frequency coding, which achieves rates on the order of the additive white Gaussian noise capacity without requiring any channel state information. Wideband time frequency coding combines impulsive frequency shift keying with pulse position modulation, which allows for information to be encoded in both the transmitted frequency and the transmission time period. On the detection side, we propose a non-coherent decoder based on a square-law detector, akin to the optimal decoder for frequency shift keying based signals. The impacts of various parameters on the symbol error probability and capacity of wideband time frequency coding are investigated, and the results show that it is robust to shadowing and highly fading channels. When compared to other modulation schemes such as code division multiple access, orthogonal frequency division multiplexing, pulse position modulation, and impulsive frequency shift keying without channel state information, wideband time frequency coding achieves higher rates in the wideband regime, and performs comparably in smaller bandwidths. |
| Databáze: | OpenAIRE |
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